HD404849 Datasheet, PDF (67/125 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404849 Series
Writing to this register is valid from the second instruction execution cycle after the execution of the
previous timer mode register C1 write instruction. A timer C initialization by writing to timer write
register C (TWCL: $00E, TWCU: $00F) must be programmed to occur after a mode change becomes
valid.
Timer mode register C1 (TMC1: $00D)
Bit
Initial value
Read/Write
Bit name
3
0
W
TMC13
2
0
W
TMC12
1
0
W
TMC11
0
0
W
TMC10
TMC13
0
1
Free-running/reload timer selection
Free-running timer
Reload timer
TMC12 TMC11 TMC10
0
0
0
1
1
0
1
1
0
0
1
1
0
1
Input clock period
2048t_cyc
1024t_cyc
512t_cyc
128t_cyc
32t_cyc
8t_cyc
4t_cyc
2t_cyc
Figure 52 Timer Mode Register C1 (TMC1)
• Timer mode register C2 (TMC2: $014): Three-bit read/write register that selects the timer C output
mode as shown in figure 53. It is reset to $0 by MCU reset.
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