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'dwd 6khhw 2ughu 1r 0' 2fwrehu 56/3&, +rvw3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv introduction the rockwell RS56L-PCI (softk56) host-processed v.90/k56flex ? modem device supports high speed analog data up to 56 kbps, 14.4 kbps fax, voice/tam, cellular phone, and speakerphone (optional) operation. the modem operates with pstn telephone lines as well as analog and digital cellular phones in the u.s. and world-wide depending upon model and installed software drivers. the modem models are listed in table 1. the modem is packaged in a single 144-pin thin quad flat pack (tqfp) that combines the pci bus interface (bif) and line/voice codec (lvc) functions. figure 1 identifies the major hardware signal interfaces supported by each model. host modem and cellular phone driver software is provided. operating with +3.3v power, this device set supports 32- bit host applications in such cellular-based mobile designs as laptop, notebook, and palmtop computers. the device is easily integrated into pci bus-based embedded motherboards, system boards, or plug-in cards. modem data pump and controller functions, traditionally enabled using dedicated hardware, are processed in a pentium mmx-compatible cpu using host-signal processing modem software. in itu-t v.90/k56flex data mode, the modem can receive data at speeds up to 56 kbps from a digitally connected v.90 or k56flex-compatible central site modem. a v.90/k56flex modem takes advantage of the pstn which is primarily digital except for the client modem to central office local loop and is ideal for applications such as remote access to an internet service provider (isp), on- line service, or corporate site. in this mode, the modem can transmit data at speeds up to v.34 rates. in v.34 data mode, the modem operates at line speeds up to 33.6 kbps. when applicable, error correction (v.42/mnp 2-4) and data compression (v.42 bis/mnp 5) maximize data transfer integrity and boost average data throughput. non-error-correcting mode is also supported. all models support remote audio recording and remote audio playback over the telephone line interface using a- law, m -law, or linear coding at 8000 or 7200 hz sample rate to support applications such as digital telephone answering machine (tam) and voice annotation. the sp model also supports position independent, full- duplex speakerphone (fdsp) operation. fax group 3 send and receive rates are supported up to 14.4 kbps with t.30 protocol. v.80 synchronous access mode supports host-controlled communication protocols, e. g., h.324 video conferencing. cellular phone operation is supported by a generic hardware interface meeting multiple standards and host software specific to a particular cell phone type. reference designs are available to minimize application design time and costs. features data modem - itu-t v.90, k56flex, v.34 (33.6 kbps), v.32 bis, v.32, v.22 bis, v.22, v.23, and v.21; bell 212a and 103 - v.42 lapm and mnp 2-4 error correction - v.42 bis and mnp 5 data compression - v.250 (ex v.25 ter) and v.251 (ex v.25 ter annex a) commands fax modem send and receive rates up to 14.4 kbps - itu-t v.17, v.29, v.27 ter, and v.21 channel 2 - eia/tia 578 class 1 and t.31 class 1.0 commands voice, telephony, tam - v.253 commands - 8-bit m -law/a-law coding (g.711) - 8-bit/16-bit linear coding - 8000/7200 hz sample rate - music on hold from host or analog hardware input - tam support with concurrent dtmf detect, ring detect, and caller id v.80 synchronous access mode supports host-controlled communication protocols - h.324 interface support v.8/v.8bis and v.251 (ex v.25 ter annex a) commands data/fax/voice call discrimination switching to/from data and fax full-duplex speakerphone (fdsp) mode (sp model) - external microphone and speaker interface - microphone gain and muting - speaker volume control and muting - adaptive acoustic and line echo cancellation - loop gain control, transmit and receive path agc cellular phone interface - hardware interface supports multiple standards - cell phone specific software supports different types and models multiple country support - call progress, blacklisting single profile stored in host modem and audio paths concurrent across pci bus
56/3&, +rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 0' features (continued) system compatibilities - windows 95, windows 95 osr2, windows 98, windows nt 4.0, windows nt 5.0 operating systems - microsoft's pc 98 design initiative compliant - unimodem/v compliant 32-bit pci local bus interface - conforms to the pci local bus specification, production version, revision 2.1 - pci bus mastering interface to the lvc - 33 mhz pci clock support supports pci bus power management - conforms to pci bus power management specification, rev. 1.1 - acpi power management registers - apm support - pme# support thin package supports low profile designs - r6794: 144-pin tqfp (1.6 mm max. height) +3.3v operation with +5v tolerant digital inputs +5v or +3.3v analog operation table 1. modem models and functions 0rgho2ughu3duw 1xpehuv 6xssruwhg )xqfwlrqv 0dunhwlqj 0rgho 1xpehu &rpelqhg %xv ,qwhuidfh %,) dqg /lqh9rlfh &rghf /9& ru /lqh &rghf /& lq 74)3 3duw 1r 6ljqdo 3urfhvvlqj +rvw %xv 9.ioh[ 'dwd 9 )d[ 9rlfh7$0 &hooxodu )'63 56/3&, 5 +rvw 3urfhvvru 3&, < 2 56/633&, 5 +rvw 3urfhvvru 3&, < < 1rwhv 0rgho rswlrqv 63 )xoogxsoh[ vshdnhuskrqh 3&, 3&, %xv 6xssruwhg ixqfwlrqv < 6xssruwhg 1rw vxssruwhg )'63 )xoogxsoh[ vshdnhuskrqh yrlfh sod\edfn dqg uhfrug wkurxjk olqh ru plfvshdnhu 9rlfh7$0 9rlfh sod\edfn dqg uhfrug wkurxjk olqh k56flex is a trademark of rockwell international and lucent technologies. mnp is a trademark of compaq computer corporation. microsoft and windows are registered trademarks of microsoft corporation.
+rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 56/3&, 0' RS56L-PCI single device combined bus interface and line codec (lc) [r6794-14: 144-pin tqfp] pci bus rs56l/sp-pci single device combined bus interface and line/voice codec (lvc) [r6794-11: 144-pin tqfp] cellular phone speaker cellular interface telephone line/ mic and speaker interface circuit mic pstn telephone line digital speaker (call progress) a. data/fax model interface b. data/fax/voice/speakerphone model interface pstn telephone line cellular phone cellular interface telephone line interface circuit digital speaker (call progress) pci bus md232f1-ghi figure 1. modem major hardware signal interfaces
56/3&, +rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 0' description general the RS56L-PCI modem provides the processing core for a complete system design featuring data/fax modem, voice/tam, cellular phone, and speakerphone support, depending on specific model (table 1). note: the term, softk56, refers to the family of rs56 modem models listed in table 1. modem operation, including dialing, call progress, telephone line interface, cell phone interface, and host interface functions are supported and controlled through the command set. the modem hardware connects to the host processor via a pci bus interface. the oem adds a crystal circuit, eeprom, telephone line interface, cellular phone interface, and audio interface, as required and supported by the modem model to complete the system. host modem software the host modem software performs two distinct tasks: 1. general modem control, which includes command sets, fax class 1, voice/tam, speakerphone, error correction, data compression, voiceview, cell phone drivers, and operating system interface functions. 2. modem data pump signal processing, which includes data and facsimile modulation and demodulation, as well as voice sample formatting. configurations of the modem software are provided to support modem models listed in table 1. binary executable modem software is provided for the oem. data/fax modes as a v.90/k56flex data modem, the modem can receive data from a digital source using a v.90- or k56flex- compatible central site modem over the digital telephone network portion of the pstn at line speeds up to 56 kbps. asymmetrical data transmission supports sending data up to v.34 rates. this mode can fallback to full-duplex v.34 mode, and to lower rates as dictated by line conditions. as a v.34 data modem, the modem can operate in 2-wire, full-duplex, asynchronous modes at line rates up to 33.6 kbps. data modem modes perform complete handshake and data rate negotiations. using v.34 modulation to optimize modem configuration for line conditions, the modem can connect at the highest data rate that the channel can support from 33600 bps down to 2400 bps with automatic fallback. automode operation in v.34 is provided in accordance with pn3320 and in v.32 bis in accordance with pn2330. all tone and pattern detection functions required by the applicable itu or bell standard are supported. in fax modem mode, the modem can operate in 2-wire, half-duplex, synchronous modes and can support group 3 facsimile send and receive speeds of 14400, 12000, 9600, 7200, 4800, or 2400 bps. fax data transmission and reception performed by the modem are controlled and monitored through the fax eia/ia-578 class 1 and t.31 class 1.0 command interface. full hdlc formatting, zero insertion/deletion, and crc generation/checking are provided. synchronous access mode (sam) - video conferencing v.80 synchronous access mode between the modem and the host/dte is provided for host-controlled communication protocols, e.g., h.324 video conferencing applications. voice-call-first (vcf) before switching to a videophone call is also supported. voice/tam mode voice/tam mode features include 8-bit m -law, a-law, and linear coding at 8000 hz and 7200 hz sample rates. tone detection/generation, call discrimination, and concurrent dtmf detection are also supported. adpcm (4-bit ima) coding is also supported to meet microsoft whql logo requirements. voice/tam mode is supported by three submodes: 1. online voice command mode supports connection to the telephone line or, for the sp model, a microphone/speaker. 2. voice receive mode supports recording voice or audio data input at the rin pin, typically from the telephone line or, for the sp model, a microphone. 3. voice transmit mode supports playback of voice or audio data to the txa1/txa2 output, typically to the telephone line or, for the sp model, a speaker. speakerphone mode (sp model) the sp model includes additional external microphone and speaker interfaces which support voice and full- duplex speakerphone (fdsp) operation. hands-free full-duplex telephone operation is supported in speakerphone mode under host control. speakerphone mode features an advanced proprietary speakerphone algorithm which supports full-duplex voice conversation with acoustic and line echo cancellation. parameters are constantly adjusted to maintain stability with automatic fallback from full-duplex to pseudo-duplex operation. the speakerphone algorithm allows position independent placement of microphone and speaker. the host can separately control volume, muting, and agc in microphone and speaker channels. cellular phone support cellular phone operation is supported by a generic hardware interface meeting multiple standards and host software specific to a particular phone type. development of software for specific phones is supported by a software developer's kit. this kit allows for straightforward porting of analog and digital cellular phone drivers to the modem. consult software release notes for the latest supported types and models.
+rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 56/3&, 0' hardware interface signals bus interface and codec (bic) interface the bic (r6794) major functional interface signals are shown in figure 2. the bic (r6794) 144-pin tqfp hardware interface signals are shown in figure 3. the bic (r6794) 144-pin tqfp pin signal assignments are shown in figure 4. cellular interface signals the i/o signals assigned to the cellular phone interface depending upon phone type are listed in table 2. gpio pins the default gpio signal assignments are listed in table 3. these assignments are configured by the .inf file. package dimensions the package dimensions for the 144-pin tqfp are shown in figure 5. electrical and environmental specifications the current and power requirements are listed in table 4. the absolute maximum ratings are listed in table 5. additional information additional information is described in the RS56L-PCI modem designers guide (order no. 1202) and in the command reference manual (order no. 1118).
56/3&, +rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 0' md232f2 si pci bus clkrun# pciclk pcirst# frame# idsel devsel# irdy# trdy# par req# gnt# inta# stop# perr# serr# cbe0# cbe1# cbe2# cbe3# ad[31:0] pme# sromclk sromcs sromout sromin xin xout 28.224 mhz crystal circuit RS56L-PCI modem device [r6794: 144-pin tqfp] daa interface oh# (gpio0) cid# (gpio1) ringwake# (input0) cid_data (input1) iring# (input3) ext_l# (input4) lcs_l#/rh_l# (input5) rxa txa1 txa2 cellular phone interface tch_clk (cel_clk) (gpio6) tch_tx (cel_data) (gpio5) tch_rx (cel_bsy_in) (gpio4) tch_frame (cel_bsy_out) (gpio3) usart_rxd2 (cell_rxd) usart_txd (cell_txd) 256 x 16 or 128 x 16 serial eeprom gnd thru 1k vio vdd avdd avaa gnd agnd pci bus: vi/o (+3.3v or +5v) +3.3v (vdd) +3.3v (vdd) +3.3va (vaa) gnd agnd vpcien# vauxen# vpcidet vauxdet power detection and switching circuit * speakerphone models only audio interface dspkout skpmute spkout* mic_v* gpio9 gpio14 figure 2. RS56L-PCI (r6794) major hardware interface signals
+rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 56/3&, 0' +3.3v +3.3v analog_ia_power vcc vaux vaux vi/o +3.3v pcipme# filter m_ctrl ad14 ad5 ad4 txa2 mic_v ad25 dspkout cel_clk m_strobe m_clk m_rxout c/be0# vc ad10 gpol1 c/be2# ad15 ad2 ad0 sromin req# ad11 v_ctrl spkmute cel_bsy_out xtalout v_strobe xtalin perr# ad26 ad3 pcireset# devsel# v_sclk m_sclk ad27 clkrun# idsel iasleep cell_rxd ad29 c/be1# sromout ad23 ad16 ad8 txa1 ad22 ad13 ad1 cell_txd ad31 dreset# ad7 dreset# oh# par ad24 ad18 trdy# v_rxout gnt# ad21 ad6 sromclk ad9 m_txsin serr# pme# pciclk sromcs set3v# ad30 ad17 frame# vref gpol14 cid# inta# c/be3# ad19 ad12 irdy# spkout cel_data cel_bsy_in v_txsin ad28 stop# ad20 vi/o1 rxasel adp y1 28.224mhz c46 27pf 5% c47 27pf 5% r15 0 r11 1k in1 insulator for y1 + c43 10uf + c45 10uf c44 0.1uf l2 r10 0 r9 1k q1 2n7002 g d s r12 0 r13 0 r14 1m r48 0 l6 u3 8 6 4 2 7 1 3 5 vdd pe do sk pre cs di gnd r8 47k c42 0.1uf u2 r6794 59 89 71 87 79 88 80 116 93 130 57 78 70 90 117 91 67 95 131 118 132 123 94 92 96 127 128 45 133 83 21 17 134 18 82 19 136 137 138 139 114 3 4 5 12 6 8 9 22 10 11 23 24 26 27 28 33 31 32 140 36 37 38 39 41 42 43 44 85 124 126 129 144 13 14 15 16 99 119 120 121 122 1 46 72 86 52 76 48 74 50 77 47 49 69 60 61 62 66 64 63 56 58 65 53 68 54 55 100 40 81 97 115 125 135 2 7 20 25 84 113 141 142 143 30 34 35 51 109 75 73 29 107 98 101 102 103 104 105 106 112 111 110 108 avdd v_rxout vdd v_txsin vdd v_sclk set3v# gpoh1 / cell_txd m_sclk ad31 agndv agnd agnd v_strobe gpoh0 / cell_rxd m_strobe agndm m_clk ad30 gpol1 ad29 inta# m_txsin m_rxout m_ctrl gnt# req# gpol0 / dreset# ad28 xin par stop# ad27 perr# xout serr# ad26 ad25 ad24 cbe3# input[7] / vauxdet ad23 ad22 ad21 cbe2# ad20 ad19 ad18 cbe1# ad17 ad16 ad15 ad14 ad13 ad12 ad11 cbe0# ad9 ad8 vio1 ad7 ad6 ad5 ad4 ad3 ad2 ad1 ad0 pme# pcirst# pciclk clkrun# idsel frame# irdy# trdy# devsel# gpio[9] sromcs sromout sromin sromclk vio2 iasleep# / gpio[15] mctrlsin v_ctrl vctrlsin mrxout vrxout mtxsin vtxsin mstrobe vstrobe vsck dspkout spkout txa1 txa2 rxa vc vref telin telout mic_v iasleep por / reset# agnd agnd speaker mute / gpio[8] vdd vdd vdd vdd vpcidet/vdd vddpci vddpci vddpci vdd vddpci gnd gnd gnd gnd gnd vddpci vddpci gnd vclkin input[1] / caller id data msck mclkin ad10 vdd gpio[14] tch_clk / gpio[6] tch_tx / gpio[5] tch_rx / gpio[4] tch_frame / gpio[3] cid# / gpio[1] oh# / gpio[0] input[5] / remote_on# input[4] / ext_oh# input[3] / ring# input[0] / ringwake# req# stop# inta# c/be3# perr# txa1 c/be2# devsel# idsel c/be0# par irdy# rxa_cell pciclk gnt# dspkout serr# frame# trdy# pcireset# c/be1# ext_l# ring# ringwake# lcs_l#/rh_l# ad[0..31] spkout mic_v pcipme# rxa gpio14 vc1 cell_txd cel_bsy_in cell_rxd spkmute gpol1 cel_data cid# gpio9 cel_bsy_out cel_clk oh# txa2 for la y out: place vref and vc components near u7 ( r6787 ) r15 not installed = +5v ia operation (also install r3) r15 installed = +3.3v ia operation (also install r4) ferrite ** do not populate ** do not populate figure 3. RS56L-PCI (r6794) 144-pin tqfp hardware interface signals
56/3&, +rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 0' md232f4 po r6794 144t 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 108 107 106 105 104 103 102 101 100 99 98 97 96 95 94 93 92 91 90 89 88 87 86 85 84 83 82 81 80 79 78 77 76 75 74 73 144 143 142 141 140 139 138 137 136 135 134 133 132 131 130 129 128 127 126 125 124 123 122 121 120 119 118 117 116 115 114 113 112 111 110 109 vio vdd ad23 ad22 ad21 ad20 vdd ad19 ad18 ad17 ad16 cbe2# frame# irdy# trdy# devsel# stop# perr# serr# vdd par cbe1# ad15 ad14 vdd ad13 ad12 ad11 ad10 vdd ad9 ad8 cbe0# vdd gnd ad7 ringwake# (input0) vdd oh# (gpio0) cid# (gpio1) tch_frame (gpio3) tch_rx (gpio4) tch_tx (gpio5) tch_clk (gpio6) spkmute (gpio8) gpio9 gpio14 vdd m_ctrl m_clk m_txsin m_sclk m_rxout m_strobe v_strobe v_rxout v_sclk v_txsin v_ctrl pme# gnd xin xout vdd set3v# vdd agnd mstrobe mrxout msclk mtxsin mclkin idsel gnd gnd gnd vio cbe3# ad24 ad25 ad26 vdd ad27 ad28 ad29 ad30 ad31 clkrun# req# gnt# pciclk vpcidet pcirst# inta# sromclk sromin sromout sromcs gpol1 cell_rxd cell_txd vdd vauxdet gnd lcs_l#/rh_l# (input 5) ext_l# (input4) iring# (input3) cid_data (input1) ad6 ad5 ad4 vdd ad3 ad2 ad1 ad0 dreset# (gpol0) sleepo (gpio15) vstrobe/nc* vrxout/nc* vsclk/nc* vtxsin/nc* vclkin/nc* vctrlsin/nc* iasleep agnd agnd telin/nc* agndv/nc* telout/nc* avdd spkout txa1 txa2 vref vc mic_v/nc* rxa agndm reset# dspkout agnd vdd mctrlsin * nc on r6794-14 figure 4. RS56L-PCI (r6794) 144-pin tqfp pin signals
+rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 56/3&, 0' e b d detail a detail a a1 l1 c l a d2 d1 d1 a2 millimeters 0.05 21.75 0.5 0.17 0.11 1.6 max 0.15 1.4 ref 22.25 20.0 ref 17.5 ref 0.75 1.0 ref 0.50 bsc 0.27 0.17 0.08 max 0.0020 0.8563 0.0197 0.0067 0.0043 a a1 a2 d d1 d2 l l1 e b c coplanarity min. max. min. max. inches* dim. ref: 144-pin tqfp (gp00-d252) * metric values (millimeters) should be used for pcb layout. english values (inches) are converted from metric values and may include round-off errors. 0.0630 max 0.0059 0.0551 ref 0.8760 0.7874 ref 0.6890 ref 0.0295 0.0394 ref 0.0197 bsc 0.0106 0.0067 0.0031 max pd-tqfp-144 (040395) d1 d d2 d1 pin 1 ref figure 5. package dimensions - 144-pin tqfp
56/3&, +rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 0' table 2. cellular phone i/o signals i/o pin signal name pdc phones tch_clk/cell_clk (gpio6) tch_clk tch_tx/cell_data (gpio5) tch_tx tch_rx/cel_bsy_in (gpio4) tch_rx tch_frame/cel_bsy_out (gpio3) tch_frame cell_rxd cell_rxd cell_txd cell_txd gpio9 adp table 3. default gpio assignments gpio function r6794 pin no. r6794 signal gpio0 106 oh# gpio1 105 cid# gpio3 104 tch_frame gpio4 103 tch_rx gpio5 102 tch_tx gpio6 101 tch_clk gpio8 100 spkmute gpio9 99 -- gpio14 98 -- gpio15 46 sleepo input0 108 ringwake# input1 109 cid_data input3 110 iring# input4 111 ext_l# input5 112 lcs_l#/rh_l#
+rvw6riwzduh3urfhvvhg9.ioh[ ? 0rghp'hylfh)dplo\iru0reloh$ssolfdwlrqv 56/3&, 0' table 4. current and power requirements conditions current power device state (dx) and bus state (bx) pci bus power pci clock (pciclk) line connection typical current (ma) maximum current (ma) typical power (mw) maximum power (mw) d0, b0 on running yes 33 36 109 130 d0, b0 on running no 22 24 73 86 d3, b0 on running no 22 24 73 86 d3, b1 on running no 22 24 73 86 d3, b2, b3 (d3 hot) on stopped no 2.1 3.2 6.9 11.5 d3, b3 (d3 cold) off stopped no <1 1 <3.3 3.6 notes: operating voltage: vdd = +3.3v 0.3v. test conditions: vdd = +3.3 vdc for typical values; vdd = +3.6 vdc for maximum values. for all modes, +3.3v is supplied to modem. definitions: pci bus power on: pci bus +5v and +3.3v on (modem normally powered by +3.3v from pci bus +3.3v or regulated down from pci bus +5v); pcirst# not asserted. off: pci bus +5v and +3.3v off (modem normally powered by +3.3v from vaux or vpci); pcirst# asserted. pci clock (pciclk) running: pci bus signal pciclk running; stopped: pci bus signal pciclk stopped (off). line connection: yes: off-hook, ia powered. no: on-hook, ia powered down. device states: d3: low power state. suspend state can change the system power state; the resulting power state depends on the system architecture (os, bios, hardware) and system configuration (i.e., other pci installed cards). d0: full power state. device and bus states: d0, b0: any pci transaction, pciclk running, vcc present. d3, b1: no pci bus transactions, pciclk running, vcc present. d3, b2, b3: no pci transactions, pciclk stopped, vcc may be present. d3, b3: no pci transactions, pciclk stopped, no vcc. refer to the pci bus power management interface specification for additional information. table 5. absolute maximum ratings parameter symbol limits units supply voltage v dd -0.5 to +4.0 v input voltage v in -0.5 to (vio +0.5)* v operating temperature range t a -0 to +70 c storage temperature range tstg -55 to +125 c analog inputs v in -0.3 to (vaa + 0.5) v voltage applied to outputs in high impedance (off) state v hz -0.5 to (vio +0.5)* v dc input clamp current i ik 20 ma dc output clamp current i ok 20 ma static discharge voltage (25c) v esd 2500 v latch-up current (25c) i trig 400 ma * vio = +3.3v 0.3v or +5.0v 5% information provided by rockwell international corporation is believed to be accurate and reliable. however, no responsibility is assumed by rockwell international for its use, nor any infringement of patents or other rights of third parties which may result from its use. no license is granted by implication or otherwise under any patent rights of rockwell international other than for circuitry embodied in rock well products. rockwell international reserves the right to change circuitry at any time without notice. this document is subject to change wi thout notice.
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