Hitachi SH7750 series, Hardware Manual

Page: 792 / 1037

Rev. 6.0, 07/02, page 742 of 986
18.2 Register Descriptions
18.2.1 Port Control Register A (PCTRA)
Port control register A (PCTRA) is a 32-bit readable/writable register that controls the
input/output direction and pull-up for each bit in the 16-bit port (port 15 pin to port 0 pin). As the
initial value of port data register A (PDTRA) is undefined, all the bits in the 16-bit port should be
set to output with PCTRA after writing a value to the PDTRA register.
PCTRA is initialized to H'00000000 by a power-on reset. It is not initialized by a manual reset or
in standby mode, and retains its contents.
Bit: 31 30 29 28 27 26 25 24
PB15PUP PB15IO PB14PUP PB14IO PB13PUP PB13IO PB12PUP PB12IO
Initial value: 0 0 0 0 0 0 0 0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 23 22 21 20 19 18 17 16
PB11PUP PB11IO PB10PUP PB10IO PB9PUP PB9IO PB8PUP PB8IO
Initial value: 0 0 0 0 0 0 0 0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 15 14 13 12 11 10 9 8
PB7PUP PB7IO PB6PUP PB6IO PB5PUP PB5IO PB4PUP PB4IO
Initial value: 0 0 0 0 0 0 0 0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W
Bit: 7 6 5 4 3 2 1 0
PB3PUP PB3IO PB2PUP PB2IO PB1PUP PB1IO PB0PUP PB0IO
Initial value: 0 0 0 0 0 0 0 0
R/W: R/W R/W R/W R/W R/W R/W R/W R/W