s908az32ag2cfue Freescale Semiconductor, Inc, s908az32ag2cfue Datasheet - Page 234

• Manufacturer Part Number: s908az32ag2cfue
• Description: M68hc08 Microcontrollers 8-bit Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Analog-To-Digital Converter (ADC-15)
21.7.2 ADC Data Register
One 8-bit result register is provided. This register is updated each time an ADC conversion completes.
21.7.3 ADC Input Clock Register
This register selects the clock frequency for the ADC.
234
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
ADCH4
Address:
Address:
to verify the operation of the ADC converter both in production test and for user applications.
Reset:
Reset:
Read:
Read:
Write:
Write:
0
0
0
0
1
1
1
1
1
$003A
ADIV2
$0039
Bit 7
AD7
Bit 7
R
R
0
R
Range 01111 ($0F) to 11010 ($1A)
ADCH3
Figure 21-4. ADC Input Clock Register (ADICLK)
1
1
1
1
1
1
1
1
1
Table 21-1. Mux Channel Select (Continued)
= Reserved
= Reserved
Figure 21-3. ADC Data Register (ADR)
ADIV1
AD6
R
6
6
0
MC68HC908AZ32A Data Sheet, Rev. 2
ADCH2
0
1
1
1
0
1
1
1
1
ADIV0
AD5
R
5
5
0
Indeterminate after Reset
ADCH1
ADICLK
1
0
0
1
1
0
0
1
1
AD4
R
4
4
0
ADCH0
AD3
R
R
3
3
0
0
1
0
1
0
1
0
1
0
1
AD2
PTD6/ATD14/TCLK/ATD14
V
R
R
2
2
0
0
SSA
Unused (see Note
Unused (see Note
Unused (see Note
PTD3/ATD11/ATD11
PTD4/ATD12/ATD12
PTD5/ATD13/ATD13
V
REFH
[ADC power off]
/V
Input Select
REFL
Reserved
AD1
(see Note
R
R
1
1
0
0
(see Note
Freescale Semiconductor
(2)
(1)
(1)
(1)
Bit 0
AD0
Bit 0
R
R
0
0
)
)
(2)
)
)
)