HD64F2149YV datasheet(281/1075 Pages) RENESAS

281 / 1075 page

Section 8 I/O Ports

Rev. 3.00 Jan 18, 2006 page 253 of 1044

REJ09B0280-0300

Selection Method and Pin Functions

PA6/A22/PS2CC/

KIN14/CIN14

The pin function is switched as shown below according to the combination of

operating mode, the KBIOE bit in KBCR2H of the keyboard buffer controller,

the IOSE bit in SYSCR, and bit PA6DDR.

Operating

mode

Modes 1, 2 (EXPE = 0), 3

Mode 2 (EXPE = 1)

KBIOE

PA6DDR

—

IOSE

——

—

Pin function

PA6

input

PA6

output

PS2CC

output

PA6

input

A22

output

PA6

output

PS2CC

output

KIN14 input pin, CIN14 input pin, PS2CC input pin

When the IICS bit in STCR is set to 1, this pin functions as a bus buffer. This

pin can always be used as the PS2CC,

KIN14, or CIN14 input pin.

PA5/A21/PS2BD/

KIN13/CIN13

The pin function is switched as shown below according to the combination of

operating mode, the KBIOE bit in KBCR1H of the keyboard buffer controller,

the IOSE bit in SYSCR, and bit PA5DDR.

Operating

mode

Modes 1, 2 (EXPE = 0), 3

Mode 2 (EXPE = 1)

KBIOE

PA5DDR

—

IOSE

——

—

Pin function

PA5

input

PA5

output

PS2BD

output

PA5

input

A21

output

PA5

output

PS2BD

output

KIN13 input pin, CIN13 input pin, PS2BD input pin

When the IICS bit in STCR is set to 1, this pin functions as a bus buffer. This

pin can always be used as the PS2BD,

KIN13, or CIN13 input pin.

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