UPD780921 datasheet(17/40 Pages) RENESAS

17 / 40 page

µPD780921, 780922, 780923, 780924

Type

Interval timer

3 channels

1 channel

External event counter

3 channels

–

Functions

Timer output

3 outputs

6 outputs

–

PWM output

3 outputs

–

Square wave output

3 outputs

–

Interrupt request

5.3

TIMER/EVENT COUNTERS

Five timer/event counter channels are incorporated.

• 8-bit timer/event counter

: 3 channels

• 10-bit timer

: 1 channel

• Watchdog timer

: 1 channel

Table 5-2. Types and Functions of Timer/Event Counters

8-bit Timer/Event

Counter

Watchdog Timer

10-bit Timer

Figure 5-2. 8-Bit Timer/Event Counter Block Diagram

Note

Count clock differs depending on the timer

TM50 : fX/2, fX23, fX25, fX27, fX29, fX11

TM51 : fX, fX/2, fX22, fX23, fX24, fX25

TM52 : fX24, fX25, fX26, fX27, fX28, fX29

Remark

n = 0 to 2

Internal Bus

TI5n

8-Bit Compare

(CR5n)

Match

8-Bit Counter n

(TM5n)

Selector

Clear

OVF

TCL5n2 TCL5n1 TCL5n0

Timer Clock Selection

Timer Mode Control

TCE5n TMC5n6 TMC5n4 LVS5n LVR5n TMC5n1 TOE5n

INV

Selector

INTTM5n

TO5n

Count ClockNote

Level

Inversion

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