H8SX1653 Datasheet, PDF (413/1018 Pages) Renesas Technology Corp – Renesas 32-Bit CISC Microcomputer H8SX Family / H8SX/1600 Series

Section 9 I/O Ports
(2) PA6/AS/AH/BS-B
The pin function is switched as shown below according to the combination of operating mode,
EXPE bit, bus controller register, port function control register (PFCR), and the PA6DDR bit
settings.
Setting
Bus
Controller I/O Port
Module Name Pin Function
AH_OE
BSB_OE
Bus controller AH output*
1

BS-B output*
0
1
AS output*
0
0
(initial setting E)
I/O port
PA6 output
0
0
PA6 input
0
0
(initial setting S)
[Legend]
Initial setting E: Initial setting in external extended mode
Initial setting S: Initial setting in single-chip mode
Note: * Valid in external extended mode (EXPE = 1)
AS_OE


1
0
0
PA6DDR



1
0
(3) PA5/RD
The pin function is switched as shown below according to the combination of operating mode, the
EXPE bit, and the PA5DDR bit settings.
Setting
MCU Operating Mode
I/O Port
Module Name Pin Function
EXPE
PA5DDR
RD output*
Bus controller (Initial setting E) 1

I/O port
PA5 output
0
1
PA5 input
(initial setting S) 0
0
[Legend]
Initial setting E: Initial setting in external extended mode
Initial setting S: Initial setting in single-chip mode
Note: * Valid in external extended mode (EXPE = 1)
Rev.1.00 Sep. 08, 2005 Page 365 of 966
REJ09B0219-0100