GMS90 Series
FUNCTIONAL DESCRIPTION
The GMS90 series is fully compatible to the standard 8051 microcontroller family.
It is compatible with the general 8051 family. While maintaining all architectural and operational characteristics
of the general 8051 family.
Figure 1 shows a block diagram of the GMS90 series
ROM/EPROM
RAM
XTAL1
XTAL2
4K/8K/16K
24K/32K
OSC & TIMING
128/256×8
CPU
Timer 0
RESET
EA/V
PP
Port 0
8-bit Digit. I/O
Port 0
Port 1
ALE/PROG
PSEN
Timer 1
Port 1
8-bit Digit. I/O
Timer 2
Port 2
8-bit Digit. I/O
Port 2
Port 3
Interrupt Unit
Serial Channel
Port 3
8-bit Digit. I/O
Figure 1. Block Diagram of the GMS90 series
Dec. 1998 Ver 3.0
11
HYNIX [ HYNIX SEMICONDUCTOR ]
