GMS90C320

8

OCT. 2000 Ver 1.2

Function Description

The GMS90 series is fully compatible to the standard 8051 microcontroller family.

It is compatible with the standard 80C32. While maintaining all architectural and operational characteristics of the standard

80C32, the GMS90C320 incorporates some enhancements in the Timer 2 unit.

Figure 1 shows a block diagram of the GMS90C320

Figure 1 Block Diagram of the GMS90C320

RAM

256 x 8

Port 0

Port 0

8-bit Digital I/O

Port 1

Port 1

8-bit Digital I/O

Port 2

Port 2

8-bit Digital I/O

Port 3

Port 3

8-bit Digital I/O

CPU

Timer 0

Timer 1

Timer 2

Interrupt Unit

Serial Channel

OSC & Timing

XTAL1

XTAL2

RESET

EA

ALE

PSEN