M37161M8_15 Datasheet, PDF (26/131 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

M37161M8/MA/MF-XXXSP/FP,M37161EFSP/FP
Port P3 direction register
b7 b6 b5 b4 b3 b2 b1 b0
1
0
Port P3 direction register (D3) [Address 00C716]
B
Name
Functions
0 Port P3 direction register
(See note 1)
1
2 OUToutput selection bit
(OUTS) (See note 2)
0 : Port P30 input
1 : Port P30 output
0 : Port P31 input
1 : Port P31 output
0 : 2 value output
1 : 3 value output
3 Fix this bit to "0."
After reset R W
0 RW
0 RW
0 RW
0 RW
4 Nothing is assigned fix this bits.
When this bit are read out, the value are "0."
5 Fix this bit to "1."
0 R–
0 R–
6 Timer 3 (T3SC)
Refer to explanation of a timer 0 R W
7 ^{Timer 2 (T2SC)}
0 : P24 input
1 : P16 input
0 RW
Notes 1: When using the port as the I²C-BUS interface, set the Port P3 Direction Register to 1.
2: Use the Clock Control Register 3 (address 021216) bit 5 to select the binary
output level of OUT.
Fig. 8.4.3 Port P3 direction register
Timer return setting register
b7 b6 b5 b4 b3 b2 b1 b0
1 1 0 0 0 0 0 Timer return setting register (TMS) [Address 00CC16]
B
Name
0 to Fix these bits to "0."
4
5,6 Fix this bit to "1."
Functions
7 STOP mode return selection bit 0: Timer Count "07FF16"
(TMS)
1: Timer Count Variable
After reset R _W
0 RW
0 RW
0 RW
Fig. 8.4.4 Timer return setting register
Rev.1.00 2003.11.25 page 24 of 128