GMS90C3X Datasheet, PDF (15/59 Pages) Hynix Semiconductor – HYNIX SEMICONDUCTOR INC. 8-BIT SINGLE-CHIP MICROCONTROLLERS

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
XTAL1
XTAL2
RESET
EA/VPP
ALE/PROG
PSEN
OSC & TIMING
CPU
Timer 0
Timer 1
Timer 2
Interrupt Unit
Serial Channel
RAM
128/256×8
ROM/EPROM
4K/8K/16K
24K/32K
Port 0
Port 1
Port 2
Port 3
Port 0
8-bit Digit. I/O
Port 1
8-bit Digit. I/O
Port 2
8-bit Digit. I/O
Port 3
8-bit Digit. I/O
Figure 1. Block Diagram of the GMS90 series
Oct. 2000 Ver 3.1a
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