3803 Datasheet, PDF (21/119 Pages) Renesas Technology Corp – SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

3803 Group (Spec.L)
b7
b0
Port P2 pull-up control register
(PULL2: address 0FF216)
P20 pull-up control bit
0: No pull-up
1: Pull-up
P21 pull-up control bit
0: No pull-up
1: Pull-up
P22 pull-up control bit
0: No pull-up
1: Pull-up
P23 pull-up control bit
0: No pull-up
1: Pull-up
P24 pull-up control bit
0: No pull-up
1: Pull-up
P25 pull-up control bit
0: No pull-up
1: Pull-up
P26 pull-up control bit
0: No pull-up
1: Pull-up
P27 pull-up control bit
0: No pull-up
1: Pull-up
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
b7
b0
Port P3 pull-up control register
(PULL3: address 0FF316)
P30 pull-up control bit
0: No pull-up
1: Pull-up
P31 pull-up control bit
0: No pull-up
1: Pull-up
Not used
(return “0” when read)
P34 pull-up control bit
0: No pull-up
1: Pull-up
P35 pull-up control bit
0: No pull-up
1: Pull-up
P36 pull-up control bit
0: No pull-up
1: Pull-up
P37 pull-up control bit
0: No pull-up
1: Pull-up
Note:
Pull-up control is valid when the corresponding
bit of the port direction register is “0” (input).
When that bit is “1” (output), pull-up cannot be
set to the port of which pull-up is selected.
Fig 17. Structure of port pull-up control register (2)
Rev.1.00 Apr 2, 2007 Page 21 of 117
REJ03B0212-0100