M16CSLASH1N datasheet(102/238 Pages) RENESAS

102 / 238 page

Rev.1.00

Oct 20, 2004

page 90 of 222

M16C/1N Group

12. Timers

REJ09B0007-0100Z

Timer Z primary

(address 008716)

Clock source

selection

Timer Y underflow

fC32

Toggle flip-flop

Port P31 register

Timer Z programmable

waveform output

switching bit

Timer Z output

level latch

Timer Z count

start flag

Timer Z interrupt

request bit

Timer Z secondary

(address 008616)

TZOUT

INT0

"0"

"1"

"0"

Peripheral data bus

Reload register (8)

Timer Z (address 008716)

Counter (8)

Prescaler Z (address 008516)

Programmable one-shot generation mode

Programmable wait one-shot generation mode

Timer Z one-shot start bit

INT0 input enable bit

INT0 input polarity select bit

One edge/ both edges

input polarity select

Digital

filter

Polarity

select

INT0 one-shot trigger

polarity select bit

fPZ

Programmable waveform generation mode

Programmable one-shot generation mode

Programmable wait one-shot generation mode

12.4 Timer Z

Timer Z is an 8-bit timer with an 8-bit prescaler and has two reload registers - Timer Z Primary and Timer

Z Secondary.

Timer Z has the four operation modes listed as follows:

• Timer mode: The timer counts an internal count source (clock source) or Timer Y underflow.

• Programmable waveform generation mode: The timer outputs pulses of a given width successively.

• Programmable one-shot generation mode: The timer outputs one-shot pulse.

• Programmable wait one-shot generation mode: The timer outputs delayed one-shot pulse.

Figure 12.20 shows the block diagram of Timer Z. Figures 12.21 to 12.24 show the Timer Z-related

registers.

Figure 12.20 Block diagram of Timer Z

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