38K2 datasheet(152/358 Pages) RENESAS

152 / 358 page

2.1 I/O port

Rev.2.00

Oct 15, 2006

page 3 of 112

38K2 Group

REJ09B0338-0200

APPLICATION

2.1.2 Related registers

Fig. 2.1.2 Structure of Port Pi (i = 0 to 6)

Fig. 2.1.3 Structure of Port Pi direction register (i = 0 to 6)

Port Pi

b7 b6b5b4b3b2b1b0

BFunction

At reset

R W

Name

Port Pi0

Port Pi1

Port Pi2

Port Pi3

Port Pi4

Port Pi5

Port Pi6

Port Pi7

In output mode

Write

Read

Port latch

In input mode

Write : Port latch

Read : Value of pins

Port Pi (Pi) (i = 0, 1, 2, 3, 4, 5, 6) (Note)

[Address : 0016, 0216, 0416, 0616, 0816, 0A16, 0C16]

Note: Since the following ports are not allocated, the corrrsponding bits can not be used.

• P20 to P23

• P44 to P47

• P64 to P67

Port Pi direction register

b7b6b5b4b3b2b1b0

Function

At reset

Name

Port Pi direction register

Port Pi direction register (PiD) (i = 0, 1, 2, 3, 4, 5, 6) (Note)

[Address : 0116, 0316, 0516, 0716, 0916, 0B16, 0D16]

0 : Port Pi0 input mode

1 : Port Pi0 output mode

0 : Port Pi1 input mode

1 : Port Pi1 output mode

0 : Port Pi2 input mode

1 : Port Pi2 output mode

0 : Port Pi3 input mode

1 : Port Pi3 output mode

0 : Port Pi4 input mode

1 : Port Pi4 output mode

0 : Port Pi5 input mode

1 : Port Pi5 output mode

0 : Port Pi6 input mode

1 : Port Pi6 output mode

0 : Port Pi7 input mode

1 : Port Pi7 output mode

Note: Since the following ports are not allocated, the corrrsponding bits can not be used.

• P20 to P23

• P44 to P47

• P64 to P67

Do not set bits of the direction register corresponding to ports P20–P23 (bits 0–3 of port P2 direction

If writing to these bits, write “0”.

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