7545 datasheet(28/62 Pages) RENESAS

28 / 62 page

Rev.1.06

Mar 07, 2008

Page 28 of 59

REJ03B0140-0106

7545 Group

Fig. 24 Block diagram of timer 1, timer 2, timer 3 and carrier wave generating circuit

1/16

1/2

1/8

1/1

Timer 2 secondary latch (8)

Timer 2(8)

Wave expansion function

Reload control

circuit

Reload control

circuit

Timer 2 primary latch (8)

Timer 2 interrupt request

Timer 3 interrupt request

Timer 3 count value reload bit

P42/CARR

"00"

"0"

"1"

"0"

"1"

"01"

"10"

"11"

Timer 1(8)

Prescaler 1 (8)

Timer 3 latch (8)

Carrier wave output valid bit

Software carrier wave output bit

Carrier wave output level bit

Timer 3(8)

Timer 1 latch (8)

Prescaler 1 latch (8)

Timer 1 interrupt request

f(XIN)/16

Timer 2 count source selection bits

1/16

1/2

1/8

"00"

"01"

"10"

"11"

Timer 3 count source selection bits

Toggle flip flop

Timer 2 count value reload bit

Carrier wave "H" interval expansion bit

Trigger stop

Carrier wave output trigger bit

Data bus

"1"

"0"

Carrier wave auto-output control bit

"1"

7545 Datasheet(PDF) 28 Page - Renesas Technology Corp

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