Texas Instruments TMS570LC4357 Technical Reference Manual page 850

Overview
The two instances of the 12-bit ADC modules on the microcontroller share 16 analog input channels. The
connections are shown in
• ADC1 supports 32 channels.
• ADC2 supports 25 channels, of which 16 channels are shared with ADC1.
• When using both ADC1 and ADC2 on a shared channel, the sample windows must be identical such
that the sample windows completely match each other or non-overlapping with a minimum of 2 ADC
cycles buffer between the end of one ADC's sample window and the start of the other ADC's sample
window.
• The reference voltages, as well as operating supply and ground, are shared between the two ADC
cores.
850
Analog To Digital Converter (ADC) Module
Figure 22-1.
Figure 22-1. Channel Assignments of Two ADC Cores
AD1EXT_SEL[4:0]
AD1EXT_ENA
AD1EVT
AD1IN[7:0]
AD1IN[15:8]/AD2IN[15:8]
AD1IN[23:16]/AD2IN[7:0]
AD1IN[31:24]
AD
AD
AD2IN[24:16]
AD2EVT
Copyright © 2018, Texas Instruments Incorporated
ADC1
12 Bit
V
CCAD
V
SSAD
REFHI
REFLO
ADC2
12 Bit
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SPNU563A – March 2018
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