7480 datasheet(26/98 Pages) RENESAS

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MITSUBISHI MICROCOMPUTERS

7480/7481 GROUP

SINGLE-CHIP 8-BIT CMOS MICROCOMPUTER

PRELIMINAR

Notice:

This

is not

a final

specification.

Some

parametric

limits

are

subject

to change.

Fig. 18 Structure of timer X/timer Y mode register and timer XY control register

Timer Y mode register (TYM : address 00F7 16)

Timer X mode register (TXM : address 00F6 16)

Timer XY control register (TXYCON : address 00F8 16)

Not used (all “0” at read)

Timer X stop control bit

0 : Count operation

1 : Count stop

Timer Y stop control bit

0 : Count operation

1 : Count stop

Timer X operating mode bits

b2 b1 b0

0 : Timer event count mode

1 : Pulse output mode

0 : Pulse cycle measurement mode

1 : Pulse width measurement mode

0 : Programmable waveform generation mode

1 : Programmable one-shot output mode

0 : PWM mode

1 : Not used

Timer X write control bit

0 : Writing to both latch and timer

1 : Writing to latch only

Output level latch

0 : “L” output

1 : “H” output

Timer X trigger selection bit

0 : Timer X free run in programmable waveform generation

mode

1 : Trigger occurrence (input signal of INT 0 pin) and timer

X start in programmable waveform generation mode.

Timer X count source selection bits

b7 b6

00 : f(XIN)/2

1 : f(XIN)/8

0 : f(XIN)/16

1 : Input from CNTR0 pin

Timer Y operating mode bits

b2 b1 b0

0 : Timer event count mode

1 : Pulse output mode

0 : Pulse cycle measurement mode

1 : Pulse width measurement mode

0 : Programmable waveform generation mode

1 : Programmable one-shot output mode

0 : PWM mode

1 : Not used

Timer Y write control bit

0 : Writing to both latch and timer

1 : Writing to latch only

Output level latch

0 : “L” output

1 : “H” output

Timer Y trigger selection bit

0 : Timer Y free run in programmable waveform

generation mode

1 : Trigger occurrence (input signal of INT 1

pin) and timer

Y start in programmable waveform generation mode.

Timer Y count source selection bits

b7 b6

0 : f(XIN)/2

1 : f(XIN)/8

0 : f(XIN)/16

1 : Input from CNTR1 pin

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