HD404654 Datasheet, PDF (51/111 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

Timer mode register A (TMA: $008)
Bit
Initial value
Read/Write
Bit name
3
—
—
Not used
2
0
W
TMA2
1
0
W
TMA1
0
0
W
TMA0
HD404654 Series
Source Input clock
TMA2 TMA1 TMA0 prescaler frequency Operating mode
0
0
0 PSS
1 PSS
1
0 PSS
1 PSS
1
0
0 PSS
1 PSS
1
0 PSS
1 PSS
2048t_cyc
1024t_cyc
512t_cyc
128t_cyc
32t_cyc
8t_cyc
4t_cyc
2t_cyc
Timer A mode
Note: Timer counter overflow output period (seconds) = input clock period (seconds) × 256.
Figure 34 Timer Mode Register A (TMA)
Timer C
Timer C Functions: Timer C has the following functions.
• Free-running/reload timer
• Watchdog timer
• Timer output operation (toggle, 0, 1, and PWM outputs)
The block diagram of timer C is shown in figure 35.
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