參數(shù)資料
型號: HD407A4669
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): 65/142頁
文件大?。?/td> 894K
代理商: HD407A4669
HD404669 Series
65
Timer mode register C2 (TMC2: $014):
Timer mode register C2 (TMC2: $014) is a 3-bit read/write
register, used to switch the function of the R31/TOC pin and select the timer C output mode as shown in
figure 44.
Timer mode register C2 (TMC2: $014) is reset to $0 by an MCU reset or in stop mode.
Bit
Initial value
Read/Write
Bit name
3
Not used
2
0
R/W
TMC22
0
0
R/W
TMC20
1
0
R/W
TMC21
Timer mode register C2 (TMC2: $014)
TMC22
0
TMC21
R3
1
/TOC
R3
1
TOC
TOC
TOC
TOC
R3
1
port
Toggle output
0 output
1 output
Not used
PWM output
TMC20
0
1
0
1
0
1
0
1
0
1
1
0
1
Figure 44 Timer Mode Register C2 (TMC2)
Timer write register C (TWCL: $00E, TWCU: $00F):
Timer write register C (TWCL: $00E, TWCU:
$00F) is a write-only register composed of a lower digit (TWCL: $00E) and an upper digit (TWCU: $00F).
The lower digit (TWCL) of timer write register C is reset to $0 by an MCU reset or in stop mode, while the
upper digit (TWCU) is undetermined.
Timer C can be initialized by writing to timer write register C (TWCL, TWCU). To write the data, first
write the lower digit (TWCL). The lower digit write does not change the timer C value. Next, write the
upper digit (TWCU). Timer C is then initialized to the timer write register C (TWCL, TWCU) value.
When writing to timer write register C (TWCL, TWCU) from the second time onward, if it is not necessary
to change the lower digit (TWCL) reload value, timer C initialization is completed by the upper digit write
alone.
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