HMS99C52 Datasheet, PDF (13/43 Pages) Hynix Semiconductor – 8-BIT SINGLE-CHIP MICROCONTROLLERS

HMS99C5X Series
FUNCTIONAL DESCRIPTION
The HMS99C5X 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 HMS99C5X series
XTAL1
XTAL2
RESET
EA/VPP
ALE/PROG
PSEN
OSC & TIMING
RAM
128/256×8
FRASH
4K/8K
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
Figure 1. Block Diagram of the HMS99C5X series
Jan. 2003 Ver 1.0
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