7702 datasheet(96/217 Pages) RENESAS

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TIMER A

7702/7703 Group User’s Manual

5–8

5.2 Block description

5.2.5 Port P5 and port P6 direction registers

The I/O pins of Timers A0 to A3 are shared with port P5, and the I/O pins of Timer A4 are shared with

port P6. When using these pins as Timer Ai’s input pins, set the corresponding bits of the port P5 and port

P6 direction registers to “0” to set these ports for the input mode. When used as Timer Ai’s output pins,

these pins are forcibly set to output pins of Timer Ai regardless of the direction registers’s contents. Figure

5.2.5 shows the relationship between the port P5 and port P6 direction registers and the Timer Ai’s I/O

pins.

Fig. 5.2.5 Relationship between port P5 and port P6 direction registers and Timer Ai’s I/O pins

Bit

Corresponding pin name

Functions

TA0OUT pin

TA1OUT pin

TA1IN pin

TA2 OUT pin

TA3OUT pin

0: Input mode

1: Output mode

When using these pins as

Timer Ai’s input pins, set the

corresponding bits to “0.”

TA2IN pin

Port P5 direction register (Address D16)

TA0IN pin

TA3IN pin

At reset

TA4OUT pin

IN T0 pin

IN T1 pin

IN T2 pin

TB1IN pin

TB0IN pin

Port P6 direction register (Address 1016)

TA4IN pin

TB2IN pin

: Bits 7 to 2 are not used for Timer A.

Corresponding pin name

Functions

Bit

At reset

0: Input mode

1: Output mode

When using these pins as

Timer Ai’s input pins, set the

corresponding bits to “0.”

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