HD404369 Datasheet, PDF (67/115 Pages) Hitachi Semiconductor – 4-bit HMCS400-Series microcomputer

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
HD404369 Series
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 50 Timer Mode Register C (TMC)
• Port mode register A (PMRA: $004): Write-only register that selects R0₃/TOC pin function as shown in
figure 51. It is reset to $0 by MCU reset.
• Timer write register C (TWCL: $00E, TWCU: $00F): Write-only register consisting of the lower digit
(TWCL) and the upper digit (TWCU) as shown in figures 52 and 53. The operation of timer write
register C is basically the same as that of timer write register B (TWBL: $00A, TWBU: $00B).
• Timer read register C (TRCL: $00E, TRCU: $00F): Read-only register consisting of the lower digit
(TRCL) and the upper digit (TRCU) that holds the count of the timer C upper digit (figures 54 and 55).
The operation of timer read register C is basically the same as that of timer read register B (TRBL:
$00A, TRBU: $00B).
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