mc68hc908ld64 Freescale Semiconductor, Inc, mc68hc908ld64 Datasheet - Page 184

• Manufacturer Part Number: mc68hc908ld64
• Description: M68hc08 Microcontrollers Microcontroller
• Manufacturer: Freescale Semiconductor, Inc

Analog-to-Digital Converter (ADC)
Data Sheet
184
Notes:
1. If any unused channels are selected, the resulting ADC conversion will be unknown.
ADCH4
↓
0
0
0
0
0
0
0
1
1
1
1
1
1
NOTE:
NOTE:
ADCH3
0
0
0
0
0
0
0
↓
1
1
1
1
1
1
ADCO — ADC Continuous Conversion Bit
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
When set, the ADC will convert samples continuously and update the
ADR register at the end of each conversion. Only one conversion is
allowed when this bit is cleared. Reset clears the ADCO bit.
ADCH[4:0] form a 5-bit field which is used to select one of the ADC
channels or reference voltages. The five channel select bits are
detailed in the
↓
0
0
0
0
1
1
1
0
0
1
1
1
1
1 = Continuous ADC conversion
0 = One ADC conversion
Table 13-1. MUX Channel Select
Analog-to-Digital Converter (ADC)
ADCH1
0
0
1
1
0
0
1
↓
1
1
0
0
1
1
Table
ADCH0
13-1.
0
1
0
1
0
1
0
↓
0
1
0
1
0
1
ADC Channel
ADC0
ADC1
ADC2
ADC3
ADC4
ADC5
—
—
—
MC68HC908LD64
Freescale Semiconductor
ADC power off
Input Select
PTC0/ADC0
PTC1/ADC1
PTC2/ADC2
PTC3/ADC3
PTC4/ADC4
PTC5/ADC5
Unused
Reserved
Unused
VRH
VRL
(1)
—
Rev. 3.0