sames
SA9203/5
PDS039-SA9203/5-001 REV. A 20-08-96
FEATURES
n Six (SA9203) or three (SA9205) 8-Bit
I/O Ports
n Each bit of one port independently
programmable as input or output
n Five (SA9203) or two (SA9205)
remaining ports can be individually
configured as input or output. (Direction
applicable to all 8 pins of each port.)
n One 8-Bit port programmable as either
atched or transparent inputs
n Supports byte-wide and bit-wide I/O
port addressing modes on all ports
n Readback of all control and port
registers
n Interfaces directly with multiplexed
address and data bus microprocessors/
microcontrollers
n Internal address latch
n Single +5V power supply
n Low power CMOS
n Completely static operation
n TTL-level compatibility
4491
1/14
6/3 X 8 PORT EXPANDER
DESCRIPTION
The SAMES SA9203/5 Port Expander is a
CMOS device suited to microprocessor
based applications requiring input/output
port expansion. The device interfaces very
simply to any microcontroller/micro-
processor with a multiplexed address/data
bus structure.
The SA9203 includes 8 independently
programmable I/O pins for Port A and Port
B to F (5 ports) independently programmable
as I/O. It is packaged in a PCB efficient 68
pin PLCC package. The SA9205 includes
8 independently programmable I/O pins for
Port A with Port B and Port C as indepen-
dently programmable I/O, packaged in a
cost effective 44 pin PLCC package.
FIGURE 1: PIN CONNECTION FOR
SA9203
2
SA9203
35
0
19
28
DR-01266
1
4
5
7
PB
PB
PB
PB
2
PB
3
PB
6
PB
27
20
21
22
23
24
26
25
31
33 34
29 30
32
9
PA
1
2
3
5
6
4
0
PA
PA
PA
PA
PA
PA
V
7
PA
PB
17
11
10
12
13
14
15
16
18
DD
876 543
PE
50
41
42
40
36 37 38 39
PE
PE
PE
PE
PE
PE
43
46
45
44
47
48
49
63
1 6665646768
PF
PF
PF
PF
PF
PF
PF
PE
V
53
57
58
56
55
54
59
52
51
PF
6162
60
