HD404344R Datasheet, PDF (60/102 Pages) Renesas Technology Corp – 4-bit microcomputer has an A/D converter

HD404344R Series/HD404394 Series
Using Timer C Registers
Timer C sets the operation and the read/write data according to the following registers.
 Timer mode register C (TMC: $00D)
 Timer write register C (TWCL: $00E, TWCU: $00F)
 Timer read register C (TRCL: $00E, TRCU: $00F)
• Timer mode register C (TMC: $00D): Four-bit write-only register that selects the free-running/reload
timer, input clock, and prescaler division ratio, as shown in figure 36. It is reset to $0 by an MCU reset.
The data written to timer mode register C is valid after two instructions cycles. The initial setting of
timer C, which is set by writing to timer write register C (TWCL: $00E, TWCU: $00F), should be
programmed to execute only after a mode change has been effective.
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 36 Timer Mode Register C (TMC)
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