7480 datasheet(112/337 Pages) RENESAS

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7480 Group and 7481 Group User's Manual

1-95

HARDWARE

1.13 Timer 1 and Timer 2

The 7480 Group and 7481 Group have two 8-bit timers with 8-bit latches:

• Timer 1

• Timer 2

Timer 1 or timer 2 can select the following operation modes by the timer 1 or 2 operation mode bit of the

timer 1 mode register (address 00F916) or the timer 2 mode register (address 00FA16):

• Timer mode

• Programmable waveform generation mode

For details, refer to the section of each mode.

1.13.1 Block Diagram

Figure 1.13.1 shows the block diagram of timer 1 and timer 2.

Figure 1.13.1 Block Diagram of Timer 1 and Timer 2

1.13.2 Registers Associated with Timer 1 and Timer 2

Figure 1.13.2 shows the memory map of the registers associated with timer 1 and timer 2.

Figure 1.13.2 Memory Map of Registers Associated with Timer 1 and Timer 2

00F416

00F516

00F916

00FA16

Timer 1 (T1)

Timer 2 (T2)

Timer 1 mode register (T1M)

Timer 2 mode register (T2M)

f(XIN)/64

f(XIN)/8

f(XIN)/128

f(XIN)/256

T0, T1 output

Timer mode register

Timer stop

control bit

Timer count source

selection bits

Timer interrupt

request bit

Output level

latch

Data bus

‘00’

‘01’

‘10’

‘11’

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