277
Port F Register (PORTF)
Bit
7
6
5
4
3
2
1
0
PF7
PF6
PF5
PF4
PF3
PF2
PF1
PF0
Initial value
—
*
—
*
—
*
—
*
—
*
—
*
—
*
—
*
Read/Write
R
R
R
R
R
R
R
R
Note:
*
Determined by the state of pins PF7 to PF0.
PORTF is an 8-bit read-only register that shows the pin states. PORTF cannot be written to;
writing of output data for the port F pins (PF7 to PF0) must always be performed on PFDR.
If a port F read is performed while PFDDR bits are set to 1, the PFDR values are read. If a port F
read is performed while PFDDR bits are cleared to 0, the pin states are read.
After a reset and in hardware standby mode, PORTF contents are determined by the pin states, as
PFDDR and PFDR are initialized. PORTF retains its prior state in software standby mode.
Port Function Control Register 2 (PFCR2)
Bit
7
6
5
4
3
2
1
0
—
—
—
—
ASOE
LWROE
OES
DMACS
Initial value
0
0
0
0
1
1
1
0
Read/Write
—
—
—
—
R/W
R/W
R/W
R/W
PFCR2 is an 8-bit readable/writable register that performs I/O port control. PFCR2 is initialized to
H'0E by a reset and in hardware standby mode. It retains its prior state in software standby mode.
Bits 7 to 4—Reserved: These bits are always read as 0, and should only be written with 0.
Bit 3—AS Output Enable (ASOE): Enables or disables
AS
output.
Bit 3
ASOE
Description
0
PF6 is designated as I/O port and does not function as
AS
output pin
1
PF6 is designated as
AS
output pin
(Initial value)
Содержание H8S/2670
Страница 5: ......
Страница 9: ......
Страница 199: ...182 ...
Страница 361: ...344 ...
Страница 393: ...376 ...
Страница 647: ...630 ...