7477 datasheet(303/354 Pages) RENESAS

303 / 354 page

3-9

7470/7471/7477/7478 GROUP USER’S MANUAL

APPENDIX

3.1 Control registers

Fig. 3.1.16 Structure of Timer FF register

Fig. 3.1.15 Structure of Timers 1 to 4

Note :

b7 b6 b5 b4 b3 b2 b1 b0

Timer 1, Timer 2, Timer 3, Timer 4 (T1, T2, T3, T4)

[Address 00F016, 00F116, 00F216,

Function

At reset RW

•Set “0016 to FF16.”

•The value is decremented by 1 each time a

count source is input.

•Each Timer values are set to the respective

counter.

•The count values are read out by reading the

respective timer.

(Note)

Timers 1 to 4

Timers 1 and 2 are undefined.

Timer 3 is “FF16.”

Timer 4 is “0716.”

00F316]

b7 b6 b5 b4 b3 b2 b1 b0

Name

Function

Timer 1

division flip-flop

At reset R W

Timer FF register (TF) [Address

Timer FF register

Nothing is allocated for these bits. These are

write disabled bits and are undefined at

reading.

? !

Timer 4

division flip-flop

0 : Initial value is “0”

1 : Initial value is “1”

0 : Initial value is “0”

1 : Initial value is “1”

00F716]

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