HD64F2145 Datasheet, PDF (236/829 Pages) Renesas Technology Corp – Hitachi 16-Bit Single-Chip Microcomputer

• PA2/A18/.,143/CIN10/PS2AC
The pin function is switched as shown below according to the combination of operating mode,
the KBIOE bit in KBCRH_0 of the keyboard buffer controller, the IOSE bit in SYSCR, and
the PA2DDR bit.
Operating
Mode
Modes 1, 2 (EXPE = 0), 3
Mode 2 (EXPE = 1)
KBIOE
0
1
0
1
PA2DDR
0
1
—
0
1
—
IOSE
—
—
—
—
0
1
—
Pin
Function
PA2
PA2
PS2AC
PA2
A18
PA2
PS2AC
input pin output pin output pin input pin output pin output pin output pin
.,143 input pin, CIN10 input pin, PS2AC input pin*
Note:* When the KBIOE bit is set to 1, this pin is an NMOS open-drain output, and has direct bus
drive capability. This pin can always be used as the PS2AC, .,143, or CIN10 input pin.
• PA1/A17/.,1</CIN9
The pin function is switched as shown below according to the combination of operating mode,
the IOSE bit in SYSCR and the PA1DDR bit.
Operating
Mode
Modes 1, 2 (EXPE = 0), 3
Mode 2 (EXPE = 1)
PA1DDR
0
1
0
1
IOSE
—
—
—
0
1
Pin Function
PA1
input pin
PA1
output pin
PA1
input pin
A17
output pin
PA1
output pin
.,1< input pin, CIN9 input pin*
Note:* This pin can always be used as the .,1< or CIN9 input pin.
Rev. 2.0, 08/02, page 196 of 788