Hitachi SH7751 Hardware Manual page 760

Bit: 31
PB31PUP
Initial value: 0
R/W: R
Bit: 23
PB27PUP
Initial value: 0
R/W: R
Bit: 15
PB23PUP
Initial value: 0
R/W: R
Bit: 7
PB19PUP
Initial value: 0
R/W: R/W
Bit 2n + 1 (n = 0–15)—Port Pull-Up Control (PBnPUP): Specifies whether each bit in the 16-
bit port B is to be pulled up with a built-in resistor. Pull-up is automatically turned off for a port
pin set to output by bit PBnIO.
Bit 2n + 1: PBnPUP
0
1
Bit 2n (n = 0–15)—Port I/O Control (PBnIO): Specifies whether each bit in the 16-bit port B is
an input or an output.
Bit 2n: PBnIO
0
1
30 29
PB31IO PB30PUP
0 0
R R
22 21
PB27IO PB26PUP
0 0
R R
14 13
PB23IO PB22PUP
0 0
R R
6 5
PB19IO PB18PUP
0 0
R/W R/W
Description
Bit m (m = 16–31) of 16-bit port B is pulled up
Bit m (m = 16–31) of 16-bit port B is not pulled up
Description
Bit m (m = 16–31) of 16-bit port B is an input
Bit m (m = 16–31) of 16-bit port B is an output
28 27
PB30IO PB29PUP PB29IO
0 0
R R
20 19
PB26IO PB25PUP PB25IO
0 0
R R
12 11
PB22IO PB21PUP PB21IO
0 0
R R
4 3
PB18IO PB17PUP PB17IO
0 0
R/W R/W
Rev. 3.0, 04/02, page 721 of 1064
26 25
PB28PUP PB28IO
0 0
R R
18 17
PB24PUP PB24IO
0 0
R R
10 9
PB20PUP PB20IO
0 0
R R
2 1
PB16PUP PB16IO
0 0
R/W R/W R/W
(Initial value)
(Initial value)
24
0
R
16
0
R
8
0
R
0
0