7540 datasheet(80/366 Pages) RENESAS

80 / 366 page

2-4

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

APPLICATION

7540 Group

2.1 I/O port

Fig. 2.1.4 Structure of Port Pi direction register (i = 0, 2, 3)

Port Pi direction register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

Port Pi direction register

Port Pi direction register (PiD) (i = 0, 2, 3) [Address : 01 16, 0516, 0716]

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: The 32-pin package versions have nothing to be allocated for the following:

•Bits 6 and 7 of P2D

•Bits 5 and 6 of P3D.

Fig. 2.1.5 Structure of Port P1 direction register

Port P1 direction register

b7 b6 b5 b4 b3 b2 b1 b0

Function

At reset

Name

Port P1 direction register

Port P1 direction register (P1D) [Address : 03 16]

0 : Port P10 input mode

1 : Port P10 output mode

0 : Port P11 input mode

1 : Port P11 output mode

0 : Port P12 input mode

1 : Port P12 output mode

0 : Port P13 input mode

1 : Port P13 output mode

0 : Port P14 input mode

1 : Port P14 output mode

Nothing is allocated for these bits.

When these bits are read out, the values are undefined.

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