7906 datasheet(416/531 Pages) RENESAS

416 / 531 page

7906 Group User’s Manual Rev.2.0

20-11

APPENDIX

Appendix 2. Control registers

Bit name

Bit

Port Pi register (i = 1, 2, 5 to 7)

(Addresses 316, 616, B16, E16, F16)

Funtion

At reset

R/W

Port pin Pi0

Port pin Pi1

Port pin Pi2

Port pin Pi3

Port pin Pi4

Port pin Pi5

Port pin Pi6

Port pin Pi7

Undefined

b7 b6 b5 b4 b3 b2 b1 b0

Notes 1: Nothing is assigned for bits 0 to 4 of the port P5 register. These bits are undefined at reading.

2: Nothing is assigned for bits 6 and 7 of the port P6 register. These bits are undefined at reading.

3: Nothing is assigned for bits 5 to 7 of the port P7 register. These bits are undefined at reading.

Data is input from or output to a pin by reading from

or writing to the corresponding bit.

0 : “L” level

1 : “H” level

Reference

5-4

Port Pi direction register (i = 1, 2, 5 to 7)

(Addresses 516, 816, D16, 1016, 1116)

Port Pi0 direction bit

Port Pi1 direction bit

Port Pi2 direction bit

Port Pi3 direction bit

Port Pi4 direction bit

Port Pi5 direction bit

Port Pi6 direction bit

Port Pi7 direction bit

b7 b6 b5 b4 b3 b2 b1 b0

Notes 1: Nothing is assigned for bits 0 to 4 of the port P5 direction register. These bits are undefined at reading.

2: Nothing is assigned for bits 6 and 7 of the port P6 direction register. These bits are undefined at reading.

3: Nothing is assigned for bits 5 to 7 of the port P7 direction register. These bits are undefined at reading.

4: Any of bits 0 to 5 of the port P6 direction register becomes “0” by input of a falling edge to pin P6OUTCUT/INT4. (Refer to

section “5.2.3 Pin P6OUTCUT/INT4.”)

0 : Input mode

(The port functions as an input port.)

1 : Output mode

(The port functions as an output port.)

Bit name

Bit

Function

At reset

R/W

Reference

5-3

Port P1

11-18

Port P2

6-20

7-10

8-6

9-9

Port P5

6-20

8-6

10-13

Port P6

5-6

7-10

Port P7

6-20

9-9

12-11

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