IA8044 Datasheet, PDF (15/49 Pages) InnovASIC, Inc – SDLC COMMUNICATIONS CONTROLLER

IA8044/IA8344
SDLC COMMUNICATIONS CONTROLLER
Data Sheet
Port 3 (P3):
General purpose, 8-bit I/O port with pullups and auxiliary functions. Bits on this port also
functions as the SIU data transmit/receive I/O, external interrupt inputs, timer inputs and the read
and write strobes for external memory accesses.
P3
Bit: 7
RD
6
WR
5
T1
4
T0
3
INT1
2
INT0
1
TxD
0
RxD
P3.0
RxD
Serial input pin.
P3.1
TxD
Serial output pin.
P3.2
INT0
External interrupt 0.
P3.3
INT1
External interrupt 1.
P3.4
T0
Timer/Counter 0 external input.
P3.5
T1
Timer/Counter 1 external input.
P3.6
WR
External Data Memory write strobe, active LOW.
P3.7
RD
External Data Memory read strobe, active LOW.
Copyright © 2003
innovASIC
The End of Obsolescence™
ENG210010112-00
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