Information

ADC Channel
(SC1n[ADCH])
Channel Input signal
(SC1n[DIFF]= 1)
Input signal
(SC1n[DIFF]= 0)
10011 AD19 Reserved ADC1_DM0
8
10100 AD20 Reserved Reserved
10101 AD21 Reserved Reserved
10110 AD22 Reserved
10111 AD23 Reserved
11000 AD24 Reserved Reserved
11001 AD25 Reserved Reserved
11010 AD26 Temperature Sensor (Diff) Temperature Sensor (S.E)
11011 AD27 Bandgap (Diff)
9
Bandgap (S.E)
9
11100 AD28 Reserved Reserved
11101 AD29 -VREFH (Diff) VREFH (S.E)
11110 AD30 Reserved VREFL
11111 AD31 Module Disabled Module Disabled
1. Interleaved with ADC0_DP3 and ADC0_DM3
2. Interleaved with ADC0_DP3
3. Interleaved with ADC0_DP0 and ADC0_DM0
4. Interleaved with ADC0_DP0
5. ADCx_CFG2[MUXSEL] bit selects between ADCx_SEn channels a and b. Refer to MUXSEL description in ADC chapter
for details.
6. Interleaved with ADC0_SE8
7. Interleaved with ADC0_SE9
8. Interleaved with ADC0_DM3
9. This is the PMC bandgap 1V reference voltage not the VREF module 1.2 V reference voltage. Prior to reading from this
ADC channel, ensure that you enable the bandgap buffer by setting the PMC_REGSC[BGBE] bit. Refer to the device data
sheet for the bandgap voltage (V
BG
) specification.
3.7.1.5 ADC Channels MUX Selection
The following figure shows the assignment of ADCx_SEn channels a and b through a
MUX selection to ADC. To select between alternate set of channels, refer to
ADCx_CFG2[MUXSEL] bit settings for more details.
AD5 [00101]
ADCx_SE4a
ADCx_SE5a
ADCx_SE6a
ADCx_SE7a
ADCx_SE4b
ADCx_SE5b
ADCx_SE6b
ADCx_SE7b
AD4 [00100]
AD6 [00110]
AD7 [00111]
ADC
Figure 3-34. ADCx_SEn channels a and b selection
Analog
K20 Sub-Family Reference Manual, Rev. 6, Nov 2011
114 Freescale Semiconductor, Inc.