Datasheet

Section 10 I/O Ports
R01UH0309EJ0500 Rev. 5.00 Page 685 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
10.18 Port Function Control Registers
The port function controller performs I/O port control. The setting of input or output for each pin
should be enabled only after the input or output destination has been selected.
The port function controller has the following registers.
• Port function control register 0 (PFCR0)
• Port function control register 1 (PFCR1)
• Port function control register 2 (PFCR2)
• Port function control register 3 (PFCR3)
• Port function control register 4 (PFCR4)
• Port function control register 5 (PFCR5)
10.18.1 Port Function Control Register 0 (PFCR0)
PFCR0 switches the functions of the chip select output pins.
Bit Bit Name Initial Value R/W Description
7 CS7E 1 R/W
6 CS6E 1 R/W
5 CS5E 1 R/W
4 CS4E 1 R/W
3 CS3E 1 R/W
2 CS2E 1 R/W
1 CS1E 1 R/W
0 CS0E 1 R/W
CS7 to CS0 Enable
These bits enable or disable the corresponding
CSn output.
0: Pin is designated as I/O port
1: Pin is designated as CSn output pin
(n = 7 to 0)