Product data

HD404818 Series
48
1/4 1/2
32.768-kHz
oscillator
System
clock
Prescaler W
(PSW)
Selector
Selector
Prescaler S (PSS)
Selector
Internal data bus
Timer A interrupt
request flag
(IFTA)
Clock
Overflow
Timer
counter A
(TCA)
Timer mode
register A
(TMA)
3
2 f
SUB
1/2 t
subcyc
(t
subcyc
)
f
SUB
ø
PER
2 4 8 32 128 512 1024 2048
÷ ÷ ÷ ÷ ÷ ÷ ÷ ÷
2 8 16 32
÷ ÷ ÷ ÷
Figure 25 Timer A Block Diagram