Datasheet

Section 10 I/O Ports
R01UH0309EJ0500 Rev. 5.00 Page 645 of 1408
Sep 24, 2012
H8S/2456, H8S/2456R, H8S/2454 Group
10.12.6 Pin Functions
Port D pins also function as the pins for data I/Os and address outputs. The correspondence
between the register specification and the pin functions is shown below.
• PD7/D15/AD15, PD6/D14/AD14, PD5/D13/AD13, PD4/D12/AD12, PD3/D11/AD11,
PD2/D10/AD10, PD1/D9/AD9, PD0/D8/AD8
The pin function is switched as shown below according to the combination of the operating
mode, bit EXPE, bit MPXE in MPXCR of the bus controller, and bit PDnDDR.
Operating
mode
1, 2, 4 3, 7
EXPE ⎯ 0 1
MPXE 0 1 ⎯ 0 1
PDnDDR ⎯ 0 1 ⎯
Pin function Data I/O Address
output/
data I/O
PDn input PDn output Data I/O Address
output/
data I/O
[Legend]
n = 7 to 0