mc68hc908sr12 Freescale Semiconductor, Inc, mc68hc908sr12 Datasheet - Page 243

• Manufacturer Part Number: mc68hc908sr12
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

MC68HC908SR12•MC68HC08SR12 — Rev. 5.0
Freescale Semiconductor
ADCH4
NOTES:
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.
↓
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
NOTE:
NOTE:
ADCH3
↓
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
1
ADCH[4:0] — ADC Channel Select Bits
Care should be taken when using a port pin as both an analog and a
digital input simultaneously to prevent switching noise from corrupting
the analog signal.
Recovery from the disabled state requires one conversion cycle to
stabilize.
ADCH2
ADCH[4:0] form a 5-bit field which is used to select one of the ADC
channels when not in auto-scan mode. The five channel select bits
are detailed in
0
0
0
0
1
1
1
1
0
0
0
0
1
1
0
↓
1
1
1
1
Table 15-1. MUX Channel Select
Analog-to-Digital Converter (ADC)
ADCH1
0
0
1
1
0
0
1
1
0
0
1
1
0
0
0
↓
0
0
1
1
Table
ADCH0
15-1.
0
1
0
1
0
1
0
1
0
1
0
1
0
1
0
↓
0
1
0
1
ADC powered-off
ADC Channel
ATD10
ATD11
ATD12
ATD13
ATD14
ATD28
ATD29
ATD30
ATD0
ATD1
ATD2
ATD3
ATD4
ATD5
ATD6
ATD7
ATD8
ATD9
↓
Analog-to-Digital Converter (ADC)
V
V
REFH
REFL
Input Select
Reserved
OPOUT
OPIN1
OPIN2
(see Note 2)
PTC3
PTC4
PTC5
PTC6
PTA0
PTA1
PTA2
PTA3
PTA4
PTA5
(see Note 2)
PTC7
—
I/O Registers
Data Sheet
243