Renesas PCA4738L-64A Informacje Techniczne Pobierz pdf (Strona 20)

MITSUBISHI MICROCOMPUTERS

3802 Group

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

Fig. 9 Block diagram of timer X, timer Y, timer 1, and timer 2

Timer X latch (8)

Timer X (8)

Prescaler X latch (8)

Prescaler X (8)

Oscillator Divider

f(X

) 1/16

CNTR

active

edge switch bit

/CNTR

Port P5

direction register

“0”

“1”

Event

counter

mode

Timer X count stop bit

CNTR

active

edge switch

bit

Port P5

latch

Pulse output

mode

Pulse width

measurement

mode

Timer mode

Pulse output

mode

“1”

“0”

Timer X latch write pulse

Pulse output mode

To timer X interrupt

request bit

To CNTR

interrupt

request bit

Data bus

Timer Y latch (8)

Timer Y (8)

Prescaler Y latch (8)

Prescaler Y (8)

CNTR

active

edge switch bit

/CNTR

Port P5

direction register

“0”

“1”

Event

counter

mode

Timer Y count stop bit

CNTR

active

edge switch

bit

Port P5

latch

Pulse output

mode

Pulse width

measurement

mode

Timer mode

Pulse output

mode

“1”

“0”

Timer Y latch write pulse

Pulse output mode

To timer Y interrupt

request bit

To CNTR

interrupt

request bit

Data bus

Toggle flip- flop T

Timer 2 latch (8) Timer 1 latch (8)

Prescaler

12 latch (8)

Prescaler 12 (8)

Timer 2 (8)Timer 1 (8)

Data bus

To timer 2 interrupt

request bit

To timer 1 interrupt

request bit

1 2 ... 15 16 17 18 19 20 21 22 23 24 25 ... 53 54

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