7733 datasheet(176/940 Pages) RENESAS

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TIMER B

7733 Group User’s Manual

7–13

7.3 Timer mode

Fig. 7.3.2 Initial setting example for registers related to timer mode

Counting is started.

Count source selection bits

0 0: Clock f 2

0 1: Clock f 16

1 0: Clock f 64

1 1: Clock f 512

Selection of the timer mode and the count source

Timer Bi mode register (i = 0 to 2)

(addresses 5B16 to 5D16)

Setting of the count start flag to “1”

Count start flag (address 4016)

Timer B0 count start flag

Timer B1 count start flag

Timer B2 count start flag

b7 b6

Setting of the interrupt priority level

Timer Bi interrupt control register

(addresses 7A16 to 7C16)

Interrupt priority level selection bits

When using interrupts, one of levels 1 to 7 must be set.

When disabling interrupts, level 0 must be set.

Must be fixed to “0” (for i = 0).

X: It may be “0” or “1.”

Clocks f2, f16, f64, and f512

: Refer to chapter “14. CLOCK GENERATING CIRCUIT.”

Timer mode is selected.

g Counter divides count source frequency by (n + 1).

Setting of the division ratio

Values 000016 to FFFF16 (n) can be set.

(b15)

(b8)

Timer B0 register (Addresses 5116, 5016)

Timer B1 register (Addresses 5316, 5216)

Timer B2 register (Addresses 5516, 5416)

7733 Datasheet(PDF) 176 Page - Renesas Technology Corp