HD404339 Datasheet, PDF (38/80 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory

HD404339 Series
Prescaler
The MCU has two built-in prescalers, S and W (PSS, PSW). They divide the system clock and subsystem
clock, and output these divided clocks to the peripheral function modules, as shown in figure 26.
Subsystem
f_X/8
clock
f_X/4 or f_X/8
Prescaler W
System
clock
Clock
selector
Prescaler S
Figure 26 Prescaler Output Supply
Timer A
Timer B
Timer C
Serial
36