7540 datasheet(53/366 Pages) RENESAS

53 / 366 page

1-34

REJ09B0018-0200Z

Rev.2.00

Jun 21, 2004

HARDWARE

7540 Group

FUNCTIONAL DESCRIPTION

Fig. 29 Block diagram of timer X, timer Y and timer Z

Toggle flip-flop

Timer Y count

stop bit

Programmable waveform

gengeration mode

f(XIN)/16

f(XIN)/2

Timer Y count

source selection bits

Waveform extension function

Timer Y primary waveform

extension control bit

P01/TYOUT

Timer Y output level latch

f(XIN)/16

Waveform extension function

Timer Z primary waveform

extenstion control bit

P02/TZOUT

INT0

interrupt

request bit

P37/INT0

f(XIN)/2

Timer Z count

stop bit

On-chip oscillator clock RING

(on-chip oscillator output in

Fig. 51, 52)

P14/CNTR0

f(XIN)/16

f(XIN)/2

Timer X

interrupt

request bit

Toggle flip-flop

Timer X count stop bit

Pulse width

measurement

mode

Event

counter

mode

CNTR0

interrupt

request bit

Pulse output mode

Port P14

latch

Port P14 direction

CNTR0 active

edge switch bit

Timer mode

Pulse output

mode

CNTR0 active

edge switch bit

Timer X count

source selection bits

f(XIN)

P03/

TXOUT

Prescaler X latch (8)

Prescaler X (8)

Timer X latch (8)

Timer X (8)

Data bus

“0”

“1”

“0”

“1”

Writing to timer X latch

Pulse output mode

P03/TXOUT output valid

Port P03 latch

Port P03

direction

Prescaler Y latch (8)

Prescaler Y (8)

Timer Y primary latch (8)

Timer Y (8)

Data bus

Timer Y secondary latch (8)

Timer Y

interrupt

request bit

Port P01 latch

Port P01

direction

Timer Y secondary

waveform extension

control bit

Prescaler Z latch (8)

Prescaler Z (8)

Timer Z primary latch (8)

Timer Z (8)

Data bus

Timer Z secondary latch (8)

Timer Z

interrupt

request bit

Timer Z count

source selection bits

One-shot pulse

trigger input

INT0 pin trigger active edge

selection bit

Programmable one-shot generation mode

Programmable wait one-shot generation mode

Timer Z one-shot start bit

Timer Z secondary waveform

extenstion control bit

Port P02 latch

Port P02 direction

Toggle flip flop

Timer Z output

level latch

Programmable waveform generation mode

Programmable one-shot generation mode

Programmable wait one-shot generation mode

7540 Datasheet(PDF) 53 Page - Renesas Technology Corp

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