sames
SA9203/5
6/3 X 8 PORT EXPANDER
FEATURES
n
n
n
Six (SA9203) or three (SA9205) 8-Bit
I/O Ports
n
n
Readback of all control and port
registers
Interfaces directly with multiplexed
addressanddatabusmicroprocessors/
microcontrollers
Each bit of one port independently
programmable as input or output
Five (SA9203) or two (SA9205)
remaining ports can be individually
configuredasinputoroutput. (Direction
applicable to all 8 pins of each port.)
n
n
n
n
n
Internal address latch
Single +5V power supply
Low power CMOS
n
n
One 8-Bit port programmable as either
atched or transparent inputs
Completely static operation
TTL-level compatibility
Supports byte-wide and bit-wide I/O
port addressing modes on all ports
FIGURE1: PINCONNECTIONFOR
SA9203
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 amultiplexed address/data
bus structure.
9
8
7
6
5
4
3
2
1
68 67 66 65 64 63 62 61
PF
60
59
7
6
5
4
3
2
PA
10
0
1
2
3
4
5
6
PF
PF
PA
PA
PA
PA
PA
PA
11
12
58
57 PF
56 PF
55 PF
54 PF
53 PF
13
14
The SA9203 includes 8 independently
programmable I/O pins for Port A and Port
BtoF(5ports)independentlyprogrammable
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.
15
16
17
18
19
20
21
1
0
PA
V
V
DD
7
52
SA9203
PE
DD
51
7
PB
50 PE
49 PE
0
6
5
4
3
2
PB
PB
PB
PB
PB
1
2
PE
48
22
23
PE
PE
47
46
45
3
4
5
24
25
26
PE
1
0
PB
PB
44 PE
6
7
32 33 34
35 36
37 38 39 40 41
42 43
27 28
29 30
31
D R - 0 1 2 6 6
1/14
20-08-96
4491
PDS039-SA9203/5-001
REV. A