SA9203

sames FEATURES n 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 n 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 n n n n n n n n n n 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/micro60 PA 0 10 59 processor with a multiplexed address/data PA 1 11 58 PA 12 2 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 ...