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V831TM 32-BIT RISC MICROCONTROLLER
The V831 microcontroller is the second member of NEC's V830TM family of 32-bit RISC microcontrollers. This high-performance, low-power microcontroller is well suited for embedded, image processing and networking applications. The V831 device integrates the V830 microprocessor core with on-chip external memory support and standard peripherals that include a DMA controller, DRAM/EDO/page-mode ROM controllers, UART, clocked serial interface, and timers. With its on-board peripherals, the V831 microcontroller provides a cost-effective solution for consumer electronics applications. S P E C I F I C AT I O N S -- Clock frequency: 33 to 100 MHz -- Performance - 118 Dhrystone MIPS at 3.3V - 157 MIPS/W -- 32-bit single-cycle MAC instruction (200 MOPS) -- 32-bit external data bus -- Power consumption: 750 mW at 100 MHz at 3.3V (max.) -- DRAM/EDO DRAM/page-mode ROM controllers -- Enhanced JTAG debugging (N-wire) -- UART, clocked serial interface, baud rate generator, and two timer/counters -- 20 interrupt sources with four programmable priority levels -- 16K of instruction and data cache/RAM -- Four-channel 8-/16-/32-bit DMA controller -- Three I/O ports -- 0.35-m CMOS process technology -- 3.3V VDD
BLOCK DIAGRAM
V830 CPU Core
NMI INTP [00:03] INTP [10:13] Programmable Interrupt Controller PC 64-Bit Barrel Shifter System Register ALU TI TCLR TO00 TO01 Real-Time Pulse Unit GeneralPurpose Registers (32-Bit x 32) ROMC Multiplier 32 x 32 + 32 DRAMC 64
BCU
RAS UUCAS ULCAS LUCAS LLCAS CS [7:1] MRD UUMWR ULMWR LUMWR LLMWR/MWR BCYST IORD IOWR A [23:1] D [31:0]
TxD RxD
UART
BRG
4K Instruction Cache 4K Instruction RAM
4K Data Cache 4K Data RAM
WCU BAU
READY BT16B HLDRQ HLDAK WE OE
SO SI SCLK
CSI
Debug Pins
DCU
Ports Clock Generator P2 P1 P0 System Control
CLKOUT X1 X2
DMARQ [3:0] DMAAK [3:0] TC/REFRQ 4-Channel DMAC
RESET
96YL-1131C (11/98)
F E AT U R E D E S C R I P T I O N CPU 200-MOPS MAC instruction -- High-performance microprocessor - Five-stage pipeline control - Thirty-two general-purpose 32-bit registers - 64-bit barrel shifter - 32-bit MAC unit -- Powerful RISC instruction set - 102 16- and 32-bit RISC instructions - Single-cycle MAC instruction (32 bits x 32 bits -- 64-bit result) > - Saturated arithmetic operation (with a saturation detection function) - One- and two-cycle double-word shift (64-bit data) - High-speed lookahead branch - Block load/store instructions -- Fast instruction execution: 10 ns at 100 MHz INTERRUPTS -- 20 maskable and prioritizable interrupts plus NMI -- Four programmable priority levels MEMORY -- 4KB instruction RAM with 4K instruction cache (direct mapping) -- 4KB data RAM with 4K data cache (direct mapping/write through) -- 128-MB linear address memory space EXTERNAL BUS INTERFACE -- Single and 16-byte burst transfer modes -- Separate 24-bit address and 32-bit data buses -- 32-/16-bit data bus sizing -- Bus hold/lock -- Seven chip select outputs OTHER FUNCTIONS -- Sleep/stop modes -- Internal clocks (3x PLL) PERIPHERALS -- DRAM controller (RAS/CAS and EDO mode) -- Page-mode ROM controller -- Two 16-bit timer/counters with five capture/compare registers -- UART and clocked serial ports with baud rate generator DMA CONTROLLER -- Four-channel controller -- 16-MB byte count -- 128-MB address range -- Memory < > memory and memory < > I/O -- -- -- 32-/16-/8-bit data width -- External terminal count pin DEVELOPMENT TOOLS -- High-performance optimized C compilers (NEC, Green Hills, MetroWerks) -- Real-time operating systems -- High-level language debugger with GUI -- ROM-ICE emulator -- N-wire ICE -- Evaluation board -- Middleware libraries - MH/MR/MMR - JBIG, JPEG, MPEG - SOFTMODEM -- PCI/I2O compatibility
O R D E R I N G I N F O R M AT I O N PART NUMBER PD705101GM-100-8ED PACKAGE 160-pin plastic QFP (24 mm x 24 mm)
For literature, call 1-800-366-9782 7 a.m. to 6 p.m. Pacific time or fax your request to 1-800-729-9288 or visit our Web site at www.nec.com
(c) 1998 NEC Electronics Inc. NEC, V800 and V831 are either trademarks or registered trademarks of NEC Corporation in the United States and/or other countries. All other trademarks are the property of their respective owners. No part of this document may be copied or reproduced in any form or by any means without the prior written consent of NEC Electronics Inc. (NECEL). The information in this document is subject to change without notice. ALL DEVICES SOLD BY NECEL ARE COVERED BY THE PROVISIONS APPEARING IN NECEL TERMS AND CONDITIONS OF SALES ONLY, INCLUDING THE LIMITATION OF LIABILITY, WARRANTY, AND PATENT PROVISIONS. NECEL makes no warranty, express, statutory, implied, or by description, regarding information set forth herein or regarding the freedom of the described devices from patent infringement. NECEL assumes no responsibility for any errors that may appear in this document. NECEL makes no commitments to update or to keep current information contained in this document. The devices listed in this document are not suitable for use in applications such as, but not limited to, aircraft control systems, aerospace equipment, submarine cables, nuclear reactor control systems, and life-support systems. "Standard" quality grade devices are recommended for computers, office equipment, communication equipment, test and measurement equipment, machine tools, industrial robots, audio and visual equipment, and other consumer products. For automotive and transportation equipment, traffic control systems, and anti-disaster and anti-crime systems, it is recommended that the customer contact the responsible NECEL salesperson to determine the reliability requirements for any such application and any cost adder. NECEL does not recommend or approve use of any of its products in life-support devices or systems or in any application where failure could result in injury or death. If customers wish to use NECEL devices in applications not intended by NECEL, customers must contact the responsible NECEL salespeople to determine NECEL's willingness to support a given application. Document # U12207EU4V0PB00

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