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lsi ls 6055 7 digit world time watch version 0.2(15.02.01) features * 7 digit lcd display * hour:minute second display * month date weekday display * alarm with chime * 32 world time display. * dst function * 2/3 keys operation * 12/24hour display * 1/2 bias 1/3 duty lcd format * built in el driver. * very low power consumption * 32768 crystal oscillator * single 3.0v operation. general description the LS6055 is a 7 digit lcd watch i.c. with hour:mi nute second, month date weekday display. it support 12h/24 h display format and has a time ala rm and hourly chime function. it has built-in world time display of 32 major city. dst functio n for all cities can be enable/disabled individuall y. it can support 2/3 keys operation : km, ks, kr. it h as built-in el driver controlled by kel. lcd display p m 2 4 h p m 2 4 h
lsi LS6055 version 0.2 (15.02.01) 2 p m 2 4 h p m 2 4 h p m 2 4 h 2 4 h p m 2 4 h p m 2 4 h p m
lsi LS6055 version 0.2 (15.02.01) 3 bonding option bop description gnd 3 key operation : km, ks, kr + kel vdd 2 key operation : km, ks + kel operation modes the LS6055 has 4 modes ? clock, date, world time an d alarm mode. by pressing km, it is shift from one mode to anoth er as follow : time mode => date mode => world time mode=> alar m mode => time mode?. in date mode, the 6055 display current month date, and weekday. in alarm mode, the 6055 display the alarm time. time mode in time mode , the LS6055 display the current time information, hour, minute, second. it also display the on/off status of alarm and chime and 12 hr/24hr format. in time mode, press kr to toggle between 12hr and 2 4hr display format (if 3 key is used). set mode at time mode, press ks to enter set mode as follow : time set alarm/chime enable/disable set alarm hour set alarm minute set weekday set month set date set hour set minute reset second time press km to adjust the setting value. in setting mode, press kr to exit from setting mode and go to time mode. if alarm time is adjusted, press ks will go to time mode after setting alarm minute. 12h/24h can be selected during set hour second can only be reset.
lsi LS6055 version 0.2 (15.02.01) 4 world time mode in world time mode, if 3 key is used (bop==gnd), press kr to review different time zone, press ks to enter world time setting mode . the setting sequence is : world time dst on/off world time hour world time minute world time mode. (press km to set the value). in world time mode, if 2 key is used (bop==vdd), press ks to review different time zone. press ks over 2 second enters world time setting mo de . the setting sequence is : world time dst on/off world time hour world time minute world time mode. (press km to set the value). el output when kel is pressed, r0,r1 provide the waveform to drive external el circuit, the el delay is around 2 ? 3 second. the r0, r1 output waveform is as follows :
lsi LS6055 version 0.2 (15.02.01) 5 oscillator trim capacitor the 32khz crystal is connected across pad oi and oo when external trim capacitor is used. the oi15pf can be used instead of oi which use int ernal capacitor of around 10-15pf. all segment on when power up, the system will turns on all lcd se gment for 2 ? 3 seconds. 32 world time is built-in the LS6055 as: zone relative to gmt hnl -10 honolulu anc -9 lax -8 los angeles den -7 denver chi -6 chicago, mexico city nyc -5 new york, toronto ccs -4 rio -3 rio de janeiro lon 0 london par +1 paris ams +1 amsterdam fra +1 frankfurt cai +2 cairo jrs +2 jed +3 mcw +3 moscow thr +3 1/2 dxb +4 kbl +4 1/2 kabul khi +5 karachi del +5 1/2 new delhi dac +6 rgn +6 1/2 bkk +7 bangkok hkg +8 hong kong pek +8 beijing tpe +8 taipei tyo +9 tokyo adl +9 1/2 syd +10 sydney nou +11 wlg +12 wellington
lsi LS6055 version 0.2 (15.02.01) 6 pin assignment designation type description b [0:1] output buzzer output vc1, vc2 output halfer output vee output halfer voltage t2, t1 input (pl) test pin oo output oscillator output oi input oscillator input vdd power +3.0v power supply gnd power ground i0-i5 input(pl) input key r[0:1] output motor output c[1:3] output lcd common output s[1:28] output lcd segment output note: (pl) ? pull low (ph) - pull high absolute maximum ratings supply voltage vdd - vss..........................0 to 5v input voltage vin.................................v ss to vdd operating temperature top .............-10 c to 60 c storing temperature tst ...................-40 c to 70 c comments stress above those listed under ?absolute maxim um ratings? may cause permanent damage to the device. these are stress rating only. fun ctional operation of this device at these or any ot her conditions above those indicated in the operational sections of this specification is not implied and exposure to absolute maximum rating conditions f or extended periods may affect device reliability. d.c. electrical characteristics (gnd = 0v, vdd = 3.0v, ta = 25 c unless otherwise specified) parameter symbol min. typ. max. unit conditions supply voltage vdd 2.5 3.0 3.6 v operating current idd - 3 6 a no load osc. built-in cap cd - 15 - pf bonding option buzzer output current ib 500 - - a vbd-vss=0.5 lcd frequency flcd - 64 - hz segment current is 0.15 - - a vseg=0.2v common current ic 3.0 - - a vcom=0.2v r[0:1] output current ir 0.8 - - ma vr-vss=0.7
lsi LS6055 version 0.2 (15.02.01) 7 pad coordinate pad x( ? m) y( ? m) pad x( ? m) y( ? m) c1 -1408.20 506.10 s26 942.20 -1513.90 s16 -1408.20 372.10 s27 1076.20 -1513.90 s15 -1408.20 238.10 s28 1210.20 -1513.90 s14 -1408.20 104.10 c3 1344.20 -1513.90 s13 -1408.20 -29.90 c2 1408.00 -1287.00 s12 -1408.20 -163.90 i4/bop 1408.00 -1151.00 s11 -1408.20 -297.90 i5 1408.00 -741.60 s10 -1408.20 -431.90 i0/km 1408.00 -597.60 s9 -1408.20 -565.90 i1/ks 1408.00 -188.20 s8 -1408.20 -699.90 i2/kr 1408.00 -44.20 s7 -1408.20 -833.90 i3/kel 1408.00 365.20 s6 -1408.20 -967.90 vdd 1408.00 509.20 s5 -1408.20 -1101.90 b0 1408.00 653.20 s4 -1408.20 -1235.90 t2 1408.00 797.20 s3 -1408.20 -1369.90 t1 1408.00 941.20 s2 -1408.20 -1503.90 b1 1408.00 1085.20 s1 -570.50 -1513.90 gnd 1408.00 1229.20 s17 -436.50 -1513.90 oi 1400.30 1423.00 s18 -238.70 -1513.90 oi 15pf 1400.30 1513.00 s19 -104.70 -1513.90 oo 184.00 1499.30 s20 93.10 -1513.90 r0 -56.30 1499.30 s21 227.10 -1513.90 r1 -425.20 1499.30 s22 406.20 -1513.90 pb -561.20 1499.30 s23 540.20 -1513.90 vc1 -1045.70 1499.30 s24 674.20 -1513.90 vc2 -1179.70 1499.30 s25 808.20 -1513.90 vee -1313.70 1499.30
lsi LS6055 version 0.2 (15.02.01) 8 pad location
lsi LS6055 version 0.2 (15.02.01) 9 application circuit
lsi LS6055 version 0.2 (15.02.01) 10 lcd drawing
lsi LS6055 version 0.2 (15.02.01) 11 ====================== sig| com1| com2| com3 ====================== c3 | | | c3 c2 | | c2 | c1 | c1 | | s1 | cc | cb | ca s2 | cf | ce | cd s3 | ci | ch | cg s4 | cl | ck | cj s5 | co | cn | cm s6 | bc | bb | ba s7 | bf | be | bd s8 | bi | bh | bg s9 | bl | bk | bj s10| bo | bn | bm s11| ac | ab | aa s12| af | ae | ad s13| ai | ah | ag s14| al | ak | aj s15| ao | an | am s16| | | s17| 4c | 4d | h24 s18| 4g | 4e | chime s19| 4b | 4f | *)) s20| 4a | | s21| 3c | 3d | dst s22| 3g | 3e | pm s23| 3b | 3f | co s24| 3a | | s25| 2c | 2d | 1c s26| 2g | 2e | 1adeg s27| 2b | 2f | 1b s28| 2a | | * s16 is not used modification hi story : version 0.2(15.02.01) update lcd table, 32 time zon e table.

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