HD404339 Datasheet, PDF (46/78 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer with large-capacity memory

HD404339 Series
Timer mode register C (TMC: $00D)
Bit
Initial value
Read/Write
Bit name
3
0
W
TMC3
2
0
W
TMC2
1
0
W
TMC1
0
0
W
TMC0
TMC3
0
1
Free-Running/Reload
Timer Selection
Free-running timer
Reload timer
TMC2
0
1
TMC1
0
1
0
1
TMC0
0
1
0
1
0
1
0
1
Input Clock Period
2048t_cyc
1024t_cyc
512t_cyc
128t_cyc
32t_cyc
8t_cyc
4t_cyc
2t_cyc
Figure 34 Timer Mode Register C (TMC)
$FF + 1
Timer C
count value
$00
Overflow
Time
CPU
operation
Normal Timer C Normal Timer C
operation clear operation clear
Program
runaway
Reset
Normal
operation
Figure 35 Watchdog Timer Operation Flowchart
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