sames
FEATURES
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SA9203/5
6/3 X 8 PORT EXPANDER
Six (SA9203) or three (SA9205) 8-Bit
I/O Ports
Each bit of one port independently
programmable as input or output
Five (SA9203) or two (SA9205)
remaining ports can be individually
configured as input or output. (Direction
applicable to all 8 pins of each port.)
One 8-Bit port programmable as either
atched or transparent inputs
Supports byte-wide and bit-wide I/O
port addressing modes on all ports
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Readback of all control and port
registers
Interfaces directly with multiplexed
address and data bus microprocessors/
microcontrollers
Internal address latch
Single +5V power supply
Low power CMOS
Completely static operation
TTL-level compatibility
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FIGURE 1: PIN CONNECTION FOR
DESCRIPTION
The SAMES SA9203/5 Port Expander is a
SA9203
CMOS device suited to microprocessor
based applications requiring input/output
port expansion. The device interfaces very
9 8 7 6 5 4 3 2 1 68 67 66 65 64 63 62 61
simply to any microcontroller/micro-
60
PA 0
10
59
processor with a multiplexed address/data
PA 1
11
58
PA 2
12
57
bus structure.
PA 3
13
56
PA 4
14
55
The SA9203 includes 8 independently
PA 5
15
54
PA 6
16
53
programmable I/O pins for Port A and Port
PA 7
17
52
SA9203
V DD
18
B to F (5 ports) independently programmable
51
PB 0
19
50
PB 1
20
as I/O. It is packaged in a PCB efficient 68
49
PB 2
21
48
pin PLCC package. The SA9205 includes
PB 3
22
47
PB 4
23
46
8 independently programmable I/O pins for
PB 5
24
45
PB 6
25
44
Port A with Port B and Port C as indepen-
PB 7
26
dently programmable I/O, packaged in a
27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43
cost effective 44 pin PLCC package.
STB
RST
INT
WR
RD
ALE
CS
A8
V SS
AD 7
AD 6
AD 5
AD 4
AD 3
AD 2
AD 1
AD 0
PC 4
PC 5
PC 6
PC 7
V SS
PD 0
PD 1
PD 2
PD 3
PD 4
PD 5
PD 6
PD 7
DR-01266
PF 7
PF 6
PF 5
PF 4
PF 3
PF 2
PF 1
PF 0
V DD
PE 7
PE 6
PE 5
PE 4
PE 3
PE 2
PE 1
PE 0
PC 0
PC 1
PC 2
PC 3
1/14
4491
PDS039-SA9203/5-001
REV. A
20-08-96
SAMES [ SAMES ]
