Port B I/O Register (Pbior) - Hitachi SH7032 Hardware Manual

• Bits 1 and 0 (PA0 Mode (PA0MD1 and PA0MD0)): PA0MD1 and PA0MD0 select the
function of the PA0/CS4/TIOCA0 pin.
Bit 1: PA0MD1 Bit 0: PA0MD0
0 0
1
1 0
1
15.3.3

Port B I/O Register (PBIOR)

The port A I/O register (PAIOR) is a 16-bit read/write register that selects input or output for the
16 pins of port A. Bits PB15IOR–PB0IOR correspond to pins of port B. PBIOR is enabled when
the port B pins function as input/outputs (PB15–PB0), for ITU input capture and output compare
(TIOCA4, TIOCA3, TIOCA2, TIOCB4, TIOCB3, and TIOCB2), and as serial clocks (SCK1,
SCK0). For other functions, they are disabled. For port B pin functions PB15–PB0, and TIOCA4,
TIOCA3, TIOCA2, TIOCB4, TIOCB3, and TIOCB2, and SCK1/SCK0, a given pin in port B is an
output pin if its corresponding PBIOR bit is set to 1, and an input pin if the bit is cleared to 0.
PBIOR is initialized to H'0000 by a power-on reset; however, it is not initialized by a manual
reset, or in standby mode or sleep mode.
Bit:
Bit name:
Initial value:
R/W:
Bit:
Bit name:
Initial value:
R/W:
Function
Input/output (PA0)
Chip select output (CS4)
ITU input capture/output compare (TIOCA0)
Reserved
15 14
PB15 PB14 PB13
IOR IOR IOR
0 0
R/W R/W R/W
7 6
PB7 PB6 PB5
IOR IOR IOR
0 0
R/W R/W R/W
13 12 11
PB12 PB11
IOR IOR
0 0 0
R/W R/W
5 4 3
PB4 PB3
IOR IOR
0 0 0
R/W R/W
(Initial value)
10 9
PB10 PB9 PB8
IOR IOR IOR
0 0
R/W R/W R/W
2 1
PB2 PB1 PB0
IOR IOR IOR
0 0
R/W R/W R/W
8
0
0
0
433