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GMS90X5XC Series HYUNDAI MicroElectronics
Jan. 2001 Ver 1.0 9
FUNCTIONAL DESCRIPTION
The GMS90X5XC 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 GMS90X5XC series
Figure 1. Block Diagram of the GMS90X5XC series
ROM/EPROM
4K/8K/16K
RAM
128/256
×
8
OSC & TIMING
CPU
Timer 0
Timer 1
Timer 2
Interrupt Unit
Serial Channel
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
XTAL1
XTAL2
RESET
EA
/V
PP
ALE/PROG
PSEN