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Chapter 28 Analog-to-Digital Converter (ADC)
MPC5606BK Microcontroller Reference Manual, Rev. 2
Freescale Semiconductor
723
The sampling phase duration is:
where
n
delay is equal to 0.5 if INPSAMP is less than or equal to 06h, otherwise it is 1. INPSAMP must
be greater than or equal to 8 (hardware requirement).
The total evaluation phase duration is:
Where:
The total conversion duration is (not including external multiplexing):
The timings refer to the unit T
ck
, where f
ck
= (1/2 × ADC peripheral set clock).
Table 28-3. ADC sampling and conversion timing at 5 V for ADC_1
Clock
(MHz)
T
ck
(
s)
INPSAMPLE
1
1
Where: INPSAMPLE
8
Ndelay
2
2
Where: INPSAMP
6, N = 0.5; INPSAMP > 6, N = 1
T
sample
3
3
Where: T
sample
= (INPSAMP-N)T
ck
; Must be
500 ns
T
sample
/T
ck
INPCMP
T
eval
(
s)
INPLATCH
T
conv
(
s)
T
conv
/
T
ck
4
0.250
8
1
1.750
7.000
1
3.000
1
5.000 20.000
5
0.200
8
1
1.400
7.000
1
2.400
1
4.000 20.000
6
0.167
8
1
1.167
7.000
1
2.000
1
3.333 20.000
7
0.143
8
1
1.000
7.000
1
1.714
1
2.857 20.000
8
0.125
8
1
0.875
7.000
1
1.500
1
2.500 20.000
16
0.063
9
1
0.500
8.000
2
1.500
1
2.063 33.000
32
0.031
17
1
0.500
16.000
0
1.500
1
2.031 65.000
T
sample
INPSAMP
1
–
T
ck
=
INPSAMP
8
T
eval
12
T
biteval
=
T
biteval
INPCMP
T
ck
=
if
INPCMP
1
T
biteval
4
T
ck
=
if
INPCMP
0
=
T
conv
T
sample
T
eval
T
ck
+
+
=
Summary of Contents for MPC5605BK
Page 2: ...This page is intentionally left blank...
Page 20: ...MPC5606BK Microcontroller Reference Manual Rev 2 20 Freescale Semiconductor...
Page 103: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 103 Clocks and power...
Page 645: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 643 Timers...
Page 715: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 713 ADC system...
Page 787: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 787 Memory...
Page 893: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 893 Integrity...
Page 943: ...MPC5606BK Microcontroller Reference Manual Rev 2 Freescale Semiconductor 943 Debug...