r5f71374an80fpv Renesas Electronics Corporation., r5f71374an80fpv Datasheet - Page 882

• Manufacturer Part Number: r5f71374an80fpv
• Description: 32-bit Risc Microcomputer Superh?? Risc Engine Family
• Manufacturer: Renesas Electronics Corporation.

Section 21 I/O Ports
21.1.1
Port A is a 16-bit input/output port. Port A has the following registers. For details on register
addresses and register states during each processing, refer to section 25, List of Registers.
Table 21.1 Register Configuration
21.1.2
The port A data register L (PADRL) is a 16-bit readable/writable register that stores port A data.
Bits PA15DR to PA0DR correspond to pins PA15 to PA0 (multiplexed functions omitted here).
When a pin function is general output, if a value is written to PADRL, that value is output directly
from the pin, and if PADRL is read, the register value is returned directly regardless of the pin
state.
When a pin function is general input, if PADRL is read, the pin state, not the register value, is
returned directly. If a value is written to PADRL, although that value is written into PADRL, it
does not affect the pin state. Table 21.2 summarizes port A data register read/write operations.
Initial value:
Rev. 1.00 Sep. 21, 2007 Page 856 of 1124
REJ09B0402-0100
Register Name
Port A data register L
Port A port register L
R/W:
Bit:
PA15
R/W
Register Descriptions
Port A Data Register L (PADRL)
DR
15
0
PA14
R/W
DR
14
0
PA13
R/W
DR
13
0
PA12
R/W
DR
12
0
PA11
R/W
11
DR
Abbrevia-
tion
PADRL
PAPRL
0
PA10
R/W
DR
10
0
R/W
PA9
DR
9
0
R/W
R/W
R
R/W
PA8
DR
8
0
Initial Value
H'0000
H'xxxx
R/W
PA7
DR
7
0
R/W
PA6
DR
6
0
R/W
PA5
DR
5
0
Address
H'FFFFD102
H'FFFFD11E
R/W
PA4
DR
4
0
R/W
PA3
DR
3
0
R/W
PA2
DR
2
0
Access Size
8, 16
8, 16
R/W
PA1
DR
1
0
R/W
PA0
DR
0
0