sab-c167cr-lm-ha Infineon Technologies Corporation, sab-c167cr-lm-ha Datasheet - Page 67
sab-c167cr-lm-ha
Manufacturer Part Number
sab-c167cr-lm-ha
Description
16-bit Single-chip Microcontroller
Manufacturer
Infineon Technologies Corporation
Datasheet
1.SAB-C167CR-LM-HA.pdf
(89 pages)
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8) During the sample time the input capacitance
Sample time and conversion time of the C167CR’s A/D Converter are programmable.
Table 14
The limit values for
Table 14
ADCON.15|14
(ADCTC)
00
01
10
11
Converter Timing Example:
Assumptions:
Basic clock
Sample time
Conversion
time
Data Sheet
internal resistance of the analog source must allow the capacitance to reach its final voltage level within
After the end of the sample time
result.
Values for the sample time
should be used to calculate the above timings.
A/D Converter Computation Table
f
f
t
t
CPU
BC
S
C
f
BC
A/D Converter
Basic clock
f
f
f
f
must not be exceeded when selecting ADCTC.
CPU
CPU
CPU
CPU
t
S
= 25 MHz (i.e.
=
=
=
depend on programming and can be taken from
f
t
t
/ 4
/ 2
/ 16
/ 8
CPU
BC
S
+ 40
t
S
× 8 = 1280 ns
, changes of the analog input voltage have no effect on the conversion
/ 4 = 6.25 MHz, i.e.
t
BC
f
BC
+ 2
C
t
CPU
AIN
t
CPU
65
can be charged/discharged by the external source. The
= 40 ns), ADCTC = ‘00’, ADSTC = ‘00’
ADCON.13|12
(ADSTC)
00
01
10
11
= (1280 + 6400 + 80) ns = 7.8 µs
t
BC
= 160 ns
Table
Electrical Parameters
Sample time
t
t
t
t
t
S
BC
BC
BC
BC
14.
× 8
× 16
× 32
× 64
V3.3, 2005-02
C167CR
C167SR
t
S
.
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