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18.3.10
Port D I/O Register L (PDIORL)
The port D I/O register L (PDIORL) is a 16-bit read/write register that selects input or output for
the least significant sixteen port D pins. Bits PD15IOR–PD0IOR correspond to the PD15/D15
pin
to PD0/D0
pin. PDIORL is enabled when the port D pins function as general input/outputs
(PD15–PD0). For other functions, it is disabled.
For port D pin functions PD15–PD0, a given pin in port D is an output pin if its corresponding
PDIORL bit is set to 1, and an input pin if the bit is cleared to 0.
PDIORL is initialized to H'0000 by external power-on reset; however, it is not initialized for
manual resets, reset by WDT, standby mode, or sleep mode, so the previous data is maintained.
Bit:
15
14
13
12
11
10
9
8
PD15
IOR
PD14
IOR
PD13
IOR
PD12
IOR
PD11
IOR
PD10
IOR
PD9
IOR
PD8
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:
76
5
4
3
2
1
0
PD7
IOR
PD6
IOR
PD5
IOR
PD4
IOR
PD3
IOR
PD2
IOR
PD1
IOR
PD0
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
18.3.11
Port D Control Registers H1, H2 (PDCRH1 and PDCRH2)
PDCRH1 and PDCRH2 are 16-bit read/write registers that select the functions of the most
significant sixteen multiplexed pins of port D. PDCRH1 selects the functions of the
PD31/D31/
ADTRG
–PD24/D24/
DREQ0
pins of port D; PDCRH2 selects the functions of the
PD23/D23/
IRQ7
–PD16/D16/
IRQ0
pins of port D. There are instances when these register settings
will be ignored, depending on the operation mode. Refer to table 18.2, Pin Arrangement by Mode,
for details.
The settings for this register are effective only for the 144-pin version. There are no corresponding
pins for this register in the 112-pin and 120-pin versions. However, read/writes are possible.
PDCRH1 and PDCRH2 are both initialized to H'0000 by external power-on reset but are not
initialized for manual resets, reset by WDT, standby mode, or sleep mode, so the previous data is
maintained.
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