r4f2456 Renesas Electronics Corporation., r4f2456 Datasheet - Page 685

• Manufacturer Part Number: r4f2456
• Description: 16-bit Single-chip Microcomputer H8s Family / H8s/2400 Series
• Manufacturer: Renesas Electronics Corporation.

10.18
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
7
6
5
4
3
2
1
0
Bit Name
CS7E
CS6E
CS5E
CS4E
CS3E
CS2E
CS1E
CS0E
Port Function Control Registers
1
1
1
1
1
1
1
1
Initial Value
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
R/W
Description
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
Rev. 1.00 Sep. 19, 2008 Page 655 of 1342
Section 10 I/O Ports
REJ09B0467-0100
(n = 7 to 0)