SD60C32 Datasheet, PDF (3/13 Pages) AUK corp – CMOS SINGLE-COMPONENT 8-BIT MICROCOMPUTER

Pin Configuration
SD60C32/P SD60C52/P
Pin Description
V_CC : PIN 40 (DIP40), PIN 44 (PLCC44)
Supply voltage during normal, Idle and power down operations.
V_SS : PIN 20 (DIP 40), PIN 22 (PLCC44)
Circuit ground.
Port 0 : PIN 32~39 (DIP 40), PIN 36~43 (PLCC44)
Port 0 is an 8bit open drain bi-directional I/O port. As an output
port each pin can sink several LS TTL inputs. Port 0 pins that have 1's
written to them float, and in that state can be used as high impedance inputs.
Port 0 is also the multiplexed low-order address and data bus during accesses
to external program and data memory.
In this application it uses strong internal pullups when emitting 1's and source and
sink several LS TTL inputs. Port 0 outputs the code bytes during program verification
on the 60C52 external pullups resistors are required during program verification.
Port 1 : PIN 1~8 (DIP 40), PIN 2~9 (PLCC44)
Port 1 output buffers can drive LSI TTL inputs.
Port 1 is an 8bit bi-directional I/O port with internal pullups.
Port 1 pins that have 1's written to them are pulled high by the internal pullups,
and in that state can be used as inputs. As inputs, Port 1 pins that are externally
being pulled low will source current because of the internal pullups
KSI-W015-000
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