HD404618 Datasheet, PDF (49/89 Pages) Hitachi Semiconductor – 4-Bit Single-Chip Microcomputer

HD404618 Series
Timer Mode Register C (TMC: $00D): Four-bit write-only register that selects the auto-reload function
and prescaler division ratio as shown in table 23. Timer mode register C is initialized to $0 by MCU reset.
Writing to this register is valid from the second instruction execution cycle. Timer C initialization set by
writing to TMC must be done after a mode change becomes valid.
Table 23 Timer Mode Register C
TMC
Bit 3
0
1
Auto-Reload Function
Disabled
Enabled
TMC
Bit 2
0
0
0
0
1
1
1
1
Bit 1
0
0
1
1
0
0
1
1
Bit 0
0
1
0
1
0
1
0
1
Prescaler Division Ratio, Clock Input Source
÷ 2048
÷ 1024
÷ 512
÷ 128
÷ 32
÷8
÷4
÷2
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