273
Port D Register (PORTD)
Bit
:
7
6
5
4
3
2
1
0
PD7
PD6
PD5PD4
PD3
PD2
PD1
PD0
Initial value :
—
*
—
*
—
*
—
*
—
*
—
*
—
*
—
*
R/W
:
R
R
R
R
R
R
R
R
Note:
*
Determined by state of pins PD7 to PD0.
PORTD is an 8-bit read-only register that shows the pin states. It cannot be written to. Writing of
output data for the port D pins (PD7 to PD0) must always be performed on PDDR.
If a port D read is performed while PDDDR bits are set to 1, the PDDR values are read. If a port D
read is performed while PDDDR bits are cleared to 0, the pin states are read.
After a reset and in hardware standby mode, PORTD contents are determined by the pin states, as
PDDDR and PDDR are initialized. PORTD retains its prior state in software standby mode.
Port D MOS Pull-Up Control Register (PDPCR)
Bit
:
7
6
5
4
3
2
1
0
PD7PCR PD6PCR PD5PCR PD4PCR PD3PCR PD2PCR PD1PCR PD0PCR
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
PDPCR is an 8-bit readable/writable register that controls the MOS input pull-up function
incorporated into port D on an individual bit basis.
In mode 7, if a pin is in the input state in accordance with the settings in PDDDR and LPCR,
setting the corresponding PDPCR bit to 1 turns on the MOS input pull-up for that pin.
PDPCR is initialized to H'00 by a reset, and in hardware standby mode. It retains its prior state in
software standby mode.
Содержание H8S/2645
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Страница 235: ...203 Transfer SAR or DAR DAR or SAR Block area First block Nth block Figure 8 8 Memory Mapping in Block Transfer Mode ...
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Страница 837: ...805 A 2 Instruction Codes Table A 2 shows the instruction codes ...
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