SH7014 Datasheet, PDF (479/754 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

16. Pin Function Controller (PFC)
16.3 Register Descriptions
16.3.1 Port A I/O Register L (PAIORL)
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
Note: * R only in the SH7014
The port A I/O register L (PAIORL) is a 16-bit read/write register that selects input or output for
the 16 pins of port A (11 pins in the SH7014). Bits PA15IOR to PA0IOR correspond to pins
PA15/CK to PA0/RXD0. PAIORL is enabled when the port A pins function as general
input/outputs (PA15 to PA0), or with the serial clock (SCK1, SCK0). For other functions, it is
disabled.
When the port A pin functions PA15 to PA0 are SCK1, SCK0, a given pin in port A is an output
pin if its corresponding PAIORL bit is set to 1, and an input pin if the bit is cleared to 0.
PAIORL is initialized to H'0000 by external power-on reset; however, it is not initialized for reset
by WDT, standby mode, or sleep mode, so the previous data is maintained.
The settings of bits 14 to 10 of this register are functional only in the SH7016 and SH7017. In the
SH7014, there are no pins corresponding to bits 14 to 10; these bits are always read as 0, and their
write value should always be 0.
Rev.5.00 Sep. 27, 2007 Page 445 of 716
REJ09B0398-0500