Port A - Renesas H8S/2100 Series Hardware Manual

Section 7 I/O Ports
7.2.10

Port A

(1) PA7/KIN15/PS2CD, PA6/KIN14/PS2CC, PA5/KIN13/PS2BD, PA4/KIN12/PS2BC,
PA3/KIN11/PS2AD, PA2/KIN10/PS2AC, PA1/KIN9/PS2DD, PA0/KIN8/PS2DC
The pin function is switched according to the combination of the register setting of PS2 and the
PAnDDR bit. When the KMIMRm bit in KMIMRA of the interrupt controller is cleared to 0, this
pin can be used as the KINm input pin.
Module
Name Pin Function
PS2 PS2 input/output
I/O port PAn output
PAn input
(initial setting)
Note: When the KBIOE bit is set to 1, this pin functions as an NMOS open-drain output, and direct
bus drive is possible.
When the IICS bit in STCR is set to 1, the output format for PA7 to PA4 is NMOS open-
drain, and direct bus drive is possible.
Rev. 1.00 Apr. 28, 2008 Page 168 of 994
REJ09B0452-0100
PS2
PS2_OE
1
0
0
Setting
I/O Port
PAnDDR

1
0
(n = 7 to 0, m = 15 to 8)