Information

SC1A
ADHWTSA
ADHWTSn
C o m p a re t r u e
A D C H
c o m p le te
A D T R G
A D C O
Control Registers
SC1n
A D IV
A D IC L K
Async
Clock Gen
A D A C K E N
2
ALTCLK
Bus Clock
ADACK
Clock
Divide
A D C K
SAR Converter
Offset Subtractor
M O D E
tr a n s f e r
Compare
Logic
C V 2
CV1:CV2
TempM
DADM3
DADM0
DADP3
DADP0
Interrupt
1
Control Sequencer
A D V IN P
A D V IN M
A C F E
1
SC2
Rn
RA
CFG1,2
C L M x
CLMx
Compare true
Conversion
Trigger
Control
MCU STOP
ADHWT
AD4
AD23
TempP
V
REFH
V
ALTH
V
REFL
V
ALTL
AIEN
C O C O
tr ig g e r
DIFF
M O D E
ADLSMP/ADLSTS
ADLPC/ADHSC
initialize
sample
convert
transfer
abort
CLPx
PG, MG
PG, MG
CLPx
Calibration
OFS
CALF
CAL
SC3
C V1
ACFGT, ACREN
D
Formatting
Averager
AVGE, AVGS
ADCOFS
V
REFSH
V
REFSL
(SC2, CFG1, CFG2)
Figure 31-1. ADC block diagram
31.2 ADC Signal Descriptions
The ADC module supports up to 4 pairs of differential inputs and up to 24 single-ended
inputs. Each differential pair requires two inputs, DADPx and DADMx. The ADC also
requires four supply/reference/ground connections.
Table 31-1. ADC Signal Descriptions
Signal Description I/O
DADP[3:0] Differential analog channel inputs I
Table continues on the next page...
Chapter 31 Analog-to-Digital Converter (ADC)
K20 Sub-Family Reference Manual, Rev. 2, Feb 2012
Freescale Semiconductor, Inc. 583