HD404339 Datasheet, PDF (40/80 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory

HD404339 Series
32.768-kHz
oscillator ^1/4
1/2
f _{W Prescaler W}
t _Wcyc
(PSW)
2 f_W
1/2 t _Wcyc
Selector
System
clock
ø_PER
Selector
Prescaler S (PSS)
Timer A interrupt
request flag
(IFTA)
Clock Timer
counter A
(TCA) ^Overflow
3
Timer mode
register A
(TMA)
Figure 27 Timer A Block Diagram
38