SH7059 Datasheet, PDF (729/1042 Pages) Renesas Technology Corp – 32-Bit RISC Microcomputer

23.11.1 Register Configuration
The port K register configuration is shown in table 23.19.
Table 23.19 Register Configuration
Name
Port K data register
Abbreviation
R/W
PKDR
R/W
Initial Value
H'0000
23. I/O Ports (I/O)
Address
H'FFFFF778
Access Size
8, 16
23.11.2 Port K Data Register (PKDR)
Bit: 15
14
13
12
11
10
9
8
PK15 PK14 PK13 PK12 PK11 PK10 PK9 PK8
DR
DR
DR
DR
DR
DR
DR
DR
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
PK7 PK6 PK5 PK4 PK3 PK2 PK1 PK0
DR
DR
DR
DR
DR
DR
DR
DR
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 K data register (PKDR) is a 16-bit readable/writable register that stores port K data. Bits PK15DR to PK0DR
correspond to pins PK15/TO8P to PK0/TO8A.
When a pin functions as a general output, if a value is written to PKDR, that value is output directly from the pin, and if
PKDR is read, the register value is returned directly regardless of the pin state.
When a pin functions as a general input, if PKDR is read, the pin state, not the register value, is returned directly. If a
value is written to PKDR, although that value is written into PKDR, it does not affect the pin state. Table 23.20
summarizes port K data register read/write operations.
PKDR 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.
Table 23.20 Port K Data Register (PKDR) Read/Write Operations
Bits 15 to 0:
PKIOR
0
1
Pin Function
Read
General input
Pin state
Other than general input Pin state
General output
PKDR value
Other than general
output
PKDR value
Write
Value is written to PKDR, but does not affect pin state
Value is written to PKDR, but does not affect pin state
Write value is output from pin
Value is written to PKDR, but does not affect pin state
Rev.3.00 Mar. 12, 2008 Page 639 of 948
REJ09B0177-0300