38C3 datasheet(70/224 Pages) RENESAS

70 / 224 page

2-5

APPLICATION

2.1 I/O port

38C3 Group User’s Manual

Fig. 2.1.7 Structure of PULL register A

Fig. 2.1.6 Structure of Port P7 direction register

Port P7 direction register

b7 b6 b5 b4 b3 b2 b1 b0

Port P7 direction register

(P7D: address 0F16)

0 : Port P70 input mode

1 : Port P70 output mode

Name

Functions

At reset R W

0 : Port P71 input mode

1 : Port P71 output mode

Port P7 direction

Nothing is arranged for these bits. When these

bits are read out, the contents are undefined.

b7 b6 b5 b4 b3 b2 b1 b0

PULL register A

(PULLA: address 1616)

0: No pull-down control

1: Pull-down control

Name

Functions

At reset R W

0: No pull-down control

1: Pull-down control

0: No pull-down control

1: Pull-down control

Port P00–P07

pull-down control

Port P10–P17

pull-down control

Port P20–P27

pull-down control

Port P70, P71

pull-up control

Port P80–P87

pull-up control

Nothing is arranged for this bit. This is a write

disabled bit. When this bit is read out, the

contents are “1”.

Nothing is arranged for this bit. This is a write

disabled bit. When this bit is read out, the

contents are “0”.

Nothing is arranged for this bit. This is a write

disabled bit. When this bit is read out, the

contents are “0”.

0: No pull-up control

1: Pull-up control

0: No pull-up control

1: Pull-up control

Note: The pin which is set to output port is cut off from pull-up control.

PULL register A

38C3 Datasheet(PDF) 70 Page - Renesas Technology Corp

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