SH7059 Datasheet, PDF (668/1042 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

22. Pin Function Controller (PFC)
22.3 Register Descriptions
22.3.1 Port A IO Register (PAIOR)
Bit: 15
14
13
12
11
10
9
8
PA15 PA14 PA13 PA12 PA11 PA10 PA9 PA8
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
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
PA7 PA6 PA5 PA4 PA3 PA2 PA1 PA0
IOR
IOR
IOR
IOR
IOR
IOR
IOR
IOR
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
The port A IO register (PAIOR) is a 16-bit readable/writable register that selects the input/output direction of the 16 pins
in port A. Bits PA15IOR to PA0IOR correspond to pins PA15/RxD0/SSI0 to PA0/TI0A. PAIOR is enabled when port A
pins function as general input/output pins (PA15 to PA0), ATU-II input/output pins or transmit/receive input/output for
the SSU* (SSI0 and SSO0), and disabled otherwise. For bits 3 to 0, when ATU-II input capture input is selected, the
PAIOR bits should be cleared to 0.
When port A pins function as PA15 to PA0, ATU-II input/output pins or transmit/receive input/output for the SSU* (SSI0
and SSO0), a pin becomes an output when the corresponding bit in PAIOR is set to 1, and an input when the bit is cleared
to 0.
PAIOR is initialized to H'0000 by a power-on reset (excluding a WDT power-on reset), in hardware standby mode, and in
software standby mode. It is not initialized in sleep mode.
Note: * SSU: Synchronous Serial Communication Unit
22.3.2 Port A Control Registers H and L (PACRH, PACRL)
Port A control registers H and L (PACRH, PACRL) are 16-bit readable/writable registers that select the functions of the
16 multiplex pins in port A. PACRH selects the functions of the pins for the upper 8 bits of port A, and PACRL selects the
functions of the pins for the lower 8 bits.
PACRH and PACRL are initialized to H'0000 by a power-on reset (excluding a WDT power-on reset), in hardware
standby mode, and in software standby mode. They are not initialized in sleep mode.
Rev.3.00 Mar. 12, 2008 Page 578 of 948
REJ09B0177-0300