參數(shù)資料
型號: HCD40C4084
廠商: Hitachi,Ltd.
英文描述: Low-Voltage AS Microcomputers with On-Chip A/D Converter(帶片上A/D轉(zhuǎn)換器的低壓微計算機)
中文描述: 低電壓如同在微機芯片的A / D轉(zhuǎn)換器(帶片上的A / D轉(zhuǎn)換器的低壓微計算機)
文件頁數(shù): 73/162頁
文件大?。?/td> 482K
代理商: HCD40C4084
HD404374/HD404384/HD404389/HD404082/HD404084 Series
73
Bit
Read/Write
Initial value on reset
Bit name
3
W
0
TMA3*
4
2
W
0
TMA2
1
W
0
TMA1
0
W
0
TMA0
TMA3
*
4
0
1
TMA2
0
1
1
0
TMA1
0
1
1
0
1
0
0
1
TMA0
0
1
0
1
0
1
0
1
0
1
0
1
0
1
x
Source prescaler
PSS
PSS
PSS
PSS
PSS
PSS
PSS
PSS
PSW
PSW
PSW
PSW
PSW
Input clock period
2,048 t
cyc
1,024 t
cyc
512 t
cyc
128 t
cyc
32 t
cyc
8 t
cyc
4 t
cyc
2 t
cyc
32 t
wcyc
16 t
wcyc
8 t
wcyc
2 t
wcyc
1/2 t
wcyc
Operating mode
Timer A
mode
Time base
mode
Timer mode register A (TMA: $00F)
Not Used
PSW, TCA reset
x : Don't care
Notes : 1. t
wcyc
= 244.14
μ
s (using 32.768 kHz crystal oscillator)
2. Timer/counter overflow output period (s) = input clock period (s)
×
256.
3. The division ratio must not be changed while time base mode is being used, as this
will result in an error in the overflow period.
4. Applies to HD404374 Series. In HD404384, HD404389, HD404082 and HD404084
Series, write as 0.
Figure 33 Timer Mode Register A (TMA)
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