7906 datasheet(128/531 Pages) RENESAS

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TIMER A

7906 Group User’s Manual Rev.2.0

7-25

Fig. 7.4.5 Structures of up-down registers 0 and 1

b7 b6 b5 b4 b3 b2 b1 b0

Up-down register 0 (Address 4416)

Timer A0 up-down bit

Timer A1 up-down bit

Timer A2 up-down bit

Fix this bit to “0.”

Timer A4 up-down bit

Timer A2 two-phase pulse signal

processing select bit

Fix this bit to “0.”

Timer A4 two-phase pulse signal

processing select bit

0 : Countdown

1 : Countup

This function is valid when the contents of the up-

down register is selected as the up-down switching

factor.

0 : Countdown

1 : Countup

This function is valid when the contents of the up-

down register is selected as the up-down switching

factor.

0 : Two-phase pulse signal processing function disabled

1 : Two-phase pulse signal processing function enabled

When not using the two-phase pulse signal processing

function, clear the bit to “0.”

The value is “0” at reading.

0 : Two-phase pulse signal processing function disabled

1 : Two-phase pulse signal processing function enabled

When not using the two-phase pulse signal processing

function, clear the bit to “0.”

The value is “0” at reading.

(Note)

Note: Use the MOVM (MOVMB) or STA(STAB, STAD) instruction for writing to bits 5 to 7.

Bit name

Bit

Function

At reset

R/W

b7 b6 b5 b4 b3 b2 b1 b0

3 to 0

6, 5

Up-down register 1 (Address C416)

Fix these bits to “0000.”

Timer A9 up-down bit

Fix these bits to “00.”

Timer A9 two-phase pulse signal

processing select bit

0 : Countdown

1 : Countup

This function is valid when the contents of the up-

down register is selected as the up-down switching

factor.

0 : Two-phase pulse signal processing function disabled

1 : Two-phase pulse signal processing function enabled

When not using the two-phase pulse signal processing

function, clear the bit to “0.”

The value is “0” at reading.

(Note)

Note: Use the MOVM(MOVMB) or STA(STAB, STAD) instruction for writing to bits 5 to 7.

Bit name

Bit

Function

At reset

R/W

00 00 0

7.4 Event counter mode

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