參數(shù)資料
型號: HCD404669
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip DTMF Generation Circuit(帶雙音多頻電路的低電壓微計算機)
中文描述: 低電壓如同在微機芯片的DTMF產(chǎn)生電路(帶雙音多頻電路的低電壓微計算機)
文件頁數(shù): 64/142頁
文件大?。?/td> 894K
代理商: HCD404669
HD404669 Series
64
Registers for Timer C Operation
By using the following registers, timer C operation modes are selected and the timer C count is read and
written.
Timer mode register C1 (TMC1: $00D)
Timer mode register C2 (TMC2: $014)
Timer write register C (TWCL: $00E, TWCU: $00F)
Timer read register C (TRCL: $00E, TRCU: $00F)
Timer mode register C1 (TMC1: $00D):
Four-bit write-only register that selects the free-running/reload
timer function, and the prescaler division ratio as shown in figure 43. It is reset to $0 by MCU reset or in
stop mode.
Writing to this register is valid from the second instruction execution cycle after the execution of the
previous timer mode register C1 write instruction. Setting timer C’s initialization by writing to timer write
register C (TWCL: $00E, TWCU: $00F) must be done after a mode change becomes valid.
Bit
Initial value
Read/Write
Bit name
3
0
W
TMC13
2
0
W
TMC12
0
0
W
TMC10
1
0
W
TMC11
Timer mode register C1 (TMC1: $00D)
0
1
0
1
0
1
0
1
0
1
0
1
0
1
2048t
cyc
1024t
cyc
512t
cyc
128t
cyc
32t
cyc
8t
cyc
4t
cyc
2t
cyc
TMC12
TM
TMC11
TMC13
0
1
Free-running/reload timer selection
Free-running timer
Reload timer
I
Figure 43 Timer Mode Register C1 (TMC1)
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