HD6432646 Hitachi, HD6432646 Datasheet - Page 186

• Manufacturer Part Number: HD6432646
• Description: (HD64F264x Series) 16-Bit Microcomputer
• Manufacturer: Hitachi

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
0
1
Bit 0—WAIT Pin Enable (WAITE): Selects enabling or disabling of wait input by means of the
WAIT pin.
Bit 0
WAITE
0
1
7.2.6
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
Bit
Initial value
R/W
Pin Function Control Register (PFCR)
Description
Write data buffer function not used
Write data buffer function used
Description
Wait input by WAIT pin disabled. WAIT pin can be used as I/O port.
Wait input by WAIT pin enabled
:
:
:
R/W
—
7
0
R/W
—
6
0
R/W
—
5
0
R/W
—
4
0
R/W
AE3
1/0
3
R/W
AE2
1/0
2
AE1
R/W
1
0
(Initial value)
(Initial value)
R/W
AE0
1/0
0