HD6437101 RENESAS [Renesas Technology Corp], HD6437101 Datasheet - Page 465

• Manufacturer Part Number: HD6437101
• Description: 32-Bit RISC Microcomputer
• Manufacturer: RENESAS [Renesas Technology Corp]

15.1.2
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 functions is a 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 functions is a 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 15.1 summarizes port A data register L read/write operations.
Bit
15
14
13
12
11
10
9
8
7
6
5
4
3
2
1
0
Bit Name
PA15DR
PA14DR
PA13DR
PA12DR
PA11DR
PA10DR
PA9DR
PA8DR
PA7DR
PA6DR
PA5DR
PA4DR
PA3DR
PA2DR
PA1DR
PA0DR
Port A Data Register L (PADRL)
Initial Value
0
0
0
0
0
0
0
0
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
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
See table 15.1.
Rev.1.00 Sep. 18, 2008 Page 431 of 522
Section 15 I/O Ports
REJ09B0069-0100