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| MC9S08SG32 Datasheet, PDF (121/328 Pages) Freescale Semiconductor, Inc – HCS08 Microcontrollers | |||
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Chapter 9
Analog-to-Digital Converter (S08ADC10V1)
9.1 Introduction
The 10-bit analog-to-digital converter (ADC) is a successive approximation ADC designed for operation
within an integrated microcontroller system-on-chip.
NOTE
⢠MC9S08SG32 Series devices operate at a higher voltage range (2.7 V to
5.5 V) and do not include stop1 mode. Please ignore references to stop1.
⢠MC9S08SG32 Series devices have up to 16 analog inputs.
Consequently, the APCTL3 register is not available on these devices.
The ADC channel assignments, alternate clock function, and hardware trigger function are conï¬gured as
described below for the MC9S08SG32 Series family of devices.
9.1.1 Channel Assignments
The ADC channel assignments for the MC9S08SG32 Series devices are shown in Table 9-1. Reserved
channels convert to an unknown value.This chapter shows bits for all S08ADCV1 channels.
MC9S08SG32 Series MCUs do not use all of these channels. All bits corresponding to channels that are
not available on a device are reserved.
Table 9-1. ADC Channel Assignment
ADCH
00000
00001
00010
00011
00100
00101
00110
00111
01000
01001
01010
01011
01100
01101
01110
Channel
AD0
AD1
AD2
AD3
AD4
AD5
AD6
AD7
AD8
AD9
AD10
AD11
AD12
AD13
AD14
Input
PTA0/AD0
PTA1/ADP1
PTA2/ADP2
PTA3/ADP3
PTB0/ADP4
PTB1/ADP5
PTB2/ADP6
PTB3/ADP7
PTC0/ADP8
PTC1/ADP9
PTC2/ADP10
PTC3/ADP11
PTC4/ADP12
PTC5/ADP13
PTC6/ADP14
ADCH
10000
10001
10010
10011
10100
10101
10110
10111
11000
11001
11010
11011
11100
11101
11110
Channel
AD16
AD17
AD18
AD19
AD20
AD21
AD22
AD23
AD24
AD25
AD26
AD27
-
VREFH
VREFL
Input
VSS
VSS
VSS
VSS
VSS
VSS
Reserved
Reserved
Reserved
Reserved
Temperature Sensor1
Internal Bandgap2
Reserved
VDD
VSS
MC9S08SG32 Data Sheet, Rev. 7
Freescale Semiconductor
121
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