8-bit Microprocessors

V25
Manufacturer NEC
Category 8 bit single-chip microcomputer
Introduction  
History

Technology

CMOS device; 63.000 transistors on a chip 5.5 mm by 6.3 mm; the V25 has a 16-bit internal bus and an 8-bit external bus; complete software compatibility with V20 to V50 microprocessors; for realtime applications the V25 can be used in conjunction with a realtime kernel for task and interrupt management; in operation the V25 can address 1 Mbyte of memory and 64 Kbyte I/O space; also available on-chip is a 256-byte RAM for CPU registers and a 256-byte RAM to allocate/define special function registers;
Max. Clock Frequency

10 MHz

Example





Package

Comment
NEC
D 70320 L 		NEC
D 70320 GJ-8
84 pin PLCC 94 pin QFP
- -

 


Manufactured
devices

Type Clock
[MHz]		 Package Pins ROM
uPD 70320 L 5 PLCC 84 ROM-less
uPD 70320 L-8 8 PLCC 84 ROM-less
uPD 70320 GJ 5 plastic miniflat 94 ROM-less
uPD 70320 GJ-8 8 plastic miniflat 94 ROM-less
uPD 70322 L 5 PLCC 84 Mask ROM
uPD 70322 L-8 8 PLCC 84 Mask ROM
uPD 70322 GJ 5 plastic miniflat 94 Mask ROM
uPD 70322 GJ-8 8 plastic miniflat 94 Mask ROM
uPD 70P322 L 5 PLCC 84 PROM (OTP)
uPD 70P320 K 5 LCC 84 EPROM
Second source  
Peripherals uPD 71011: Clock Pulse Generator for V20/V30 (using 50 % Duty Cycle)
uPD 71051: Programmable Coomunication Interface
uPD 71054: Programable Timers / Counters
uPD 71055: Programable Parallel Interface
uPD 71059: Programmable Interrupt Controller
uPD 71071: DMA Controller with programmable 8 or 16 bit Buswidth
uPD 71082: Octal Latch
uPD 71083: Octal Latch
uPD 71084: Clock Pulse Generator (33 % Duty Cycle)
uPD 71086: Bus Transceiver, 8 bit
uPD 71087: Bus Transceiver, 8 bit
uPD 71088: System Bus Controller