Pin Function Control Register (Pfcr) - Hitachi H8S/2646 Hardware Manual

Bit 1—Write Data Buffer Enable (WDBE): This bit selects whether or not to use the write
buffer function in the external write cycle.
Bit 1
WDBE Description
0 Write data buffer function not used
1 Write data buffer function used
Bit 0—WAIT Pin Enable (WAITE): Selects enabling or disabling of wait input by means of the
WAIT pin.
Bit 0
WAITE Description
Wait input by WAIT pin disabled. WAIT pin can be used as I/O port.
0
Wait input by WAIT pin enabled
1
7.2.6

Pin Function Control Register (PFCR)

Bit : 7
—
Initial value : 0
R/W : R/W
PFCR is an 8-bit read/write register that controls the address output in expanded mode with ROM.
PFCR is initialized to H'0D/H'00 by a reset and in hardware standby mode. It retains its previous
state in software standby mode.
Bits 7 to 4—Reserved: Only 0 should be written to these bits.
152
6 5
— — —
0 0
R/W R/W R/W
4 3 2
AE3 AE2
0 1/0 1/0
R/W R/W
(Initial value)
(Initial value)
1 0
AE1 AE0
0 1/0
R/W R/W