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| MC9S08QG8 Datasheet, PDF (115/300 Pages) Freescale Semiconductor, Inc – 8-BIT HCS08 Central Processor Unit | |||
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Chapter 9 Analog-to-Digital Converter (S08ADC10V1)
9.1.1 Module Conï¬gurations
This section provides device-speciï¬c information for conï¬guring the ADC on MC9S08QG8/4.
9.1.1.1 Analog Supply and Voltage Reference Connections
The VDDAD and VREFH sources for the ADC are internally connected to the VDD pin. The VSSAD and
VREFL sources for the ADC are internally connected to the VSS pin.
9.1.1.2 Channel Assignments
The ADC channel assignments for the MC9S08QG8/4 devices are shown in Table 9-1. Reserved channels
convert to an unknown value.
Table 9-1. ADC Channel Assignment
ADCH
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
Channel
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
Input
PTA0/ADP0
PTA1/ADP1
PTA2/ADP2
PTA3/ADP3
PTB0/ADP4
PTB1/ADP5
PTB2/ADP6
PTB3/ADP7
VSS
VSS
VSS
Pin Control
ADPC0
ADPC1
ADPC2
ADPC3
ADPC4
ADPC5
ADPC6
ADPC7
N/A
N/A
N/A
01011 AD11
VSS
N/A
01100 AD12
VSS
N/A
01101 AD13
VSS
N/A
01110 AD14
VSS
N/A
01111 AD15
VSS
N/A
1 For information, see Section 9.1.1.6, âTemperature Sensor.â
ADCH Channel
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
AD16
AD17
AD18
AD19
AD20
AD21
AD22
AD23
AD24
AD25
AD26
11011
11100
11101
11110
11111
AD27
â
VREFH
VREFL
Module
Disabled
Input
Pin Control
VSS
N/A
VSS
N/A
VSS
N/A
VSS
N/A
VSS
N/A
VSS
N/A
Reserved
N/A
Reserved
N/A
Reserved
N/A
Reserved
N/A
Temperature
N/A
Sensor1
Internal Bandgap
N/A
Reserved
N/A
VDD
N/A
VSS
N/A
None
N/A
NOTE
Selecting the internal bandgap channel requires BGBE =1 in SPMSC1 see
Section 5.8.8, âSystem Power Management Status and Control 1 Register
(SPMSC1).â For value of bandgap voltage reference see Section A.5, âDC
Characteristics.â
MC9S08QG8 and MC9S08QG4 Data Sheet, Rev. 1.01
Freescale Semiconductor
115
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