Port A - Renesas H8S/2100 Series Hardware Manual

Section 8 I/O Ports
8.2.10

Port A

(1) PA7/KIN15, PA6/KIN14, PA1/KIN9, PA0/KIN8
The pin function is switched according to the PAnDDR bit. When the KMIMRm bit in KMIMRA
of the interrupt controller is cleared to 0, this pin functions as the KINm input pin.
PAnDDR
Pin function
Note: When the IICS bit in STCR is set to 1, the output format for PA7 and PA6 is NMOS open-
drain, and direct bus drive is possible.
(2) PA5/KIN13/PS2BD, PA4/KIN12/PCS2BC, PA3/KIN11/PS2AD, PA2/KIN10/PS2AC
The pin function is switched according to the combination of the KBIOE bit in KBCRH of PS2
and the PAnDDR bit. When the KMIMRm bit in KMIMRA of the interrupt controller is cleared to
0, this pin functions as the KINm input pin.
KBIOE
PAnDDR
Pin function
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 PA5 and PA4 is NMOS open-
drain, and direct bus drive is possible.
Rev. 1.00 May 09, 2008 Page 176 of 954
REJ09B0462-0100
0
PAn input pin
0
0
PAn input pin
PAn output pin
KINm input pin
(n = 7, 6, 1, 0, m = 15, 14, 9, 8)
1
PAn output pin
KINm input pin
1
1

PS2 I/O pin
(n = 5 to 2, m = 13 to 10)