NSC800 > NatSemiNSC800N
Modified: May 30, 2005, 10:01 pm
Manufacturer:National Semiconductor
Model:NSC800N
Speed:1 MHz
Type:NSC800
Data Code:8309
Introduced:1981
Transistors:11,000
Package:40PDIP
Process:??
Architecture:8 bit
Used in:Computers
Description:The NSC800 is an 8-bit CMOS microprocessor that functions
as the central processing unit (CPU) in National Semiconductor's
NSC800 microcomputer family. National's
microCMOS technology used to fabricate this device provides
system designers with performance equivalent to
comparable NMOS products, but with the low power advantage
of CMOS. Some of the many system functions incorporated
on the device, are vectored priority interrupts, refresh
control, power-save feature and interrupt acknowledge. The
NSC800 is available in dual-in-line and surface mounted
chip carrier packages.

Fully compatible with Z80 instruction set:
Powerful set of 158 instructions
10 addressing modes
22 internal registers
- Low power: 50 mW at 5V VCC
- Unique power-save feature
- Multiplexed bus structure
- Schmitt trigger input on reset
- On-chip bus controller and clock generator
- Variable power supply 2.4Vb6.0V
- On-chip 8-bit dynamic RAM refresh circuitry