參數(shù)資料
型號: MC68HC908JK8CP
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 8 MHz, MICROCONTROLLER, PDIP20
封裝: PLASTIC, DIP-20
文件頁數(shù): 39/56頁
文件大小: 648K
代理商: MC68HC908JK8CP
MC68HC908JL8SM/D
ADC Data Register
This register is updated each time an ADC conversion completes.
ADC Input Clock
Register
ADIV2–ADIV0 — ADC Clock Prescaler Bits
0
1
1
0
1
0
Unused(1)
1
1011
Reserved
11
1
0
Reserved
11
1
0
1—
VDDA
(2)
11
1
0—
VSSA
(2)
11
1
1—
ADC power off
1. If any unused channels are selected, the resulting ADC conversion will be unknown.
2. The voltage levels supplied from internal reference nodes, as specified in the table, are used to verify
the operation of the ADC converter both in production test and for user applications.
Table 11. MUX Channel Select (Continued)
ADCH4 ADCH3 ADCH2 ADCH1 ADCH0
ADC Channel
Input Select
$003D
Bit 7
654321
Bit 0
AD7
AD6
AD5
AD4
AD3
AD2
AD1
AD0
Reset:
Indeterminate after reset
Figure 37. ADC Data Register (ADR)
$003E
Bit 7
654321
Bit 0
ADIV2
ADIV1
ADIV0
00000
Reset:
00000000
Figure 38. ADC Input Clock Register (ADICLK)
Table 12. ADC Clock Divide Ratio
ADIV2
ADIV1
ADIV0
ADC Clock Rate
0
Bus clock ÷ 1
0
1
Bus clock ÷ 2
0
1
0
Bus clock ÷ 4
0
1
Bus clock ÷ 8
1
X
Bus clock ÷ 16
X = don’t care
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Freescale Semiconductor, Inc.
For More Information On This Product,
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