HD64F2149 Datasheet, PDF (279/1035 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

Pin
Selection Method and Pin Functions
PA2/A18/PS2AC/ The pin function is switched as shown below according to the combination of
KIN10/CIN10
operating mode, the KBIOE bit in KBCR0H of the keyboard buffer controller,
the IOSE bit in SYSCR, and bit PA2DDR.
Operating Modes 1, 2 (EXPE = 0), 3
mode
Mode 2 (EXPE = 1)
KBIOE
0
1
0
1
PA2DDR
0
1
—
0
1
—
IOSE
—
—
—
—
0
1
—
Pin function
PA2
input
pin
PA2 PS2AC
output output
pin
pin
PA2
input
pin
A18 PA2 PS2AC
output output output
pin
pin
pin
KIN10 input pin, CIN10 input pin, PS2AC input pin
This pin can always be used as the PS2AC, KIN10, or CIN10 input pin.
PA1/A17/KIN9/
CIN9
The pin function is switched as shown below according to the combination of
operating mode, the IOSE bit in SYSCR and bit PA1DDR.
Operating
mode
Modes 1,
2 (EXPE = 0), 3
Mode 2 (EXPE = 1)
PA1DDR
0
1
0
1
IOSE
—
—
—
0
1
Pin function PA1
PA1
PA1
A17
PA1
input pin output pin input pin output pin output pin
KIN9 input pin, CIN9 input pin
This pin can always be used as the KIN9 or CIN9 input pin.
PA0/A16/KIN8/
CIN8
The pin function is switched as shown below according to the combination of
operationg mode, the IOSE bit in SYSCR and bit PA0DDR.
Operating
mode
Modes 1,
2 (EXPE = 0), 3
Mode 2 (EXPE = 1)
PA0DDR
0
1
0
1
IOSE
—
—
—
0
1
Pin function PA0
PA0
PA0
A16
PA0
input pin output pin input pin output pin output pin
KIN8 input pin, CIN8 input pin
This pin can always be used as the KIN8 or CIN8 input pin.
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