Datasheet

Section 10 I/O Ports
Page 690 of 1408 R01UH0309EJ0500 Rev. 5.00
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
10.18.5 Port Function Control Register 4 (PFCR4)
PFCR4 switches the functions of the WAIT input pin, BREQ input pin, BACK output pin,
BREQO output pin, TxD4 output pin, RxD4 input pin, and SCK4 input/output pin.
Bit Bit Name Initial Value R/W Description
7 WAITS 0 R/W WAIT Pin Select
Selects the WAIT input pin.
0: PF0/WAIT-A is selected
1: P25/WAIT-B is selected
6 BREQS 0 R/W BREQ Pin Select
Selects the BREQ input pin.
0: PG6/BREQ-A is selected
1: P51/BREQ-B is selected
5 BACKS 0 R/W BACK Pin Select
Selects the BACK output pin.
0: PG5/BACK-A is selected
1: P52/BACK-B is selected
4 BREQOS 0 R/W BREQO Pin Select
Selects the BREQO output pin.
0: PG4/BREQO-A is selected
1: P50/BREQO-B is selected
3 ⎯ 0 ⎯ Reserved
This bit is read as 0. When written, the initial value
should be written to.
2 TXD4S 0 R/W Enables TxD4-B output.
Enables or disables TxD4-B output.
0: PA1 is designated as I/O port.
1: PA1 is designated as TxD4-B output pin.