D78054 データシートの表示（PDF） - NEC => Renesas Technology

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D78054

8-BIT SINGLE-CHIP MICROCOMPUTER

NEC => Renesas Technology 

µPD78001B(A), 78002B(A)

3.1 PORT PINS (2/2)

Pin Name

I/O

Function

P50 to P57

Input/

output

P60

Input/

output

P61

P62

P63

P64

P65

P66

P67

Port 5

8-bit input/output port.

LED can be driven directly.

Input/output can be specified bit-wise.

When used as an input port, pull-up resistor can be used by software.

Port 6

8-bit input/output port.

Input/output can be specified

bit-wise.

N-ch open-drain input/output port. On-

chip pull-up resistor can be specified by

mask option.

LED can be driven directly.

When used as an input port, pull-up

resistor can be used by software.

After

Reset

Input

Dual-

Function Pin

A8 to A15

Input

RD

WR

WAIT

ASTB

Caution When pull-up resistors are not used (specified by mask option), the low-level input leak current

increases with -200 µA (MAX.) under either of the following conditions.

1 When the external device expansion function is used and a low-level is input to the pin.

2 During the 3-clock period when a read instruction is executed on port 6 (P6) and the port mode

register (PM6).

11

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