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MCF51QE128 MCU Series Reference Manual, Rev. 3
Freescale Semiconductor 217
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Chapter 11 Analog-to-Digital Converter (S08ADC12V1)
11.1.2 Module Configurations
This section provides device-specific information for configuring the ADC on the MCF51QE128 Series.
11.1.2.1 Channel Assignments
The ADC channel assignments for the MCF51QE128 Series devices are shown in Table 11-1. Reserved
channels convert to an unknown value.
NOTE
Selecting the internal bandgap channel requires SPMSC1[BGBE] to be set.
See Section 5.7.6, “System Power Management Status and Control 1
Register (SPMSC1)”. For the value of bandgap voltage reference, see the
data sheet.
11.1.2.2 Alternate Clock
The ADC is capable of performing conversions using the MCU bus clock, the bus clock divided by two,
the local asynchronous clock (ADACK) within the module, or the alternate clock (ALTCLK). The
ALTCLK on the MCF51QE128 Series is the ICSERCLK. See Chapter 12, “Internal Clock Source
(S08ICSV3),” for more information.
Table 11-1. ADC Channel Assignment
ADCH Channel Input Pin Control ADCH Channel Input Pin Control
00000 AD0 PTA0/ADP0 ADPC0 10000 AD16 PTF6/ADP16 N/A
00001 AD1 PTA1/ADP1 ADPC1 10001 AD17 PTF7/ADP17 N/A
00010 AD2 PTA2/ADP2 ADPC2 10010 AD18 PTG2/ADP18 N/A
00011 AD3 PTA3/ADP3 ADPC3 10011 AD19 PTG3/ADP19 N/A
00100 AD4 PTB0/ADP4 ADPC4 10100 AD20 PTG4/ADP20 N/A
00101 AD5 PTB1/ADP5 ADPC5 10101 AD21 PTG5/ADP21 N/A
00110 AD6 PTB2/ADP6 ADPC6 10110 AD22 PTG6/ADP22 N/A
00111 AD7 PTB3/ADP7 ADPC7 10111 AD23 PTG7/ADP23 N/A
01000 AD8 PTA6/ADP8 N/A 11000 AD24 Reserved N/A
01001 AD9 PTA7/ADP9 N/A 11001 AD25 Reserved N/A
01010 AD10 PTF0/ADP10 N/A 11010 AD26 Temperature
Sensor
1
1
For information, see Section 11.1.2.4, “Temperature Sensor.”
N/A
01011 AD11 PTF1/ADP11 N/A 11011 AD27 Internal Bandgap N/A
01100 AD12 PTF2/ADP12
N/A 11100 — Reserved N/A
01101 AD13 PTF3/ADP13
N/A 11101 V
REFH
V
DD
N/A
01110 AD14 PTF4/ADP14
N/A 11110 V
REFL
V
SS
N/A
01111 AD15 PTF5/ADP15
N/A 11111 Module
Disabled
None N/A