SAK-C164CM-4EF Infineon Technologies AG, SAK-C164CM-4EF Datasheet - Page 58
SAK-C164CM-4EF
Manufacturer Part Number
SAK-C164CM-4EF
Description
16-Bit Single-Chip Microcontrol ler
Manufacturer
Infineon Technologies AG
Datasheet
1.SAK-C164CM-4EF.pdf
(68 pages)
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Part Number:
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8)
Sample time and conversion time of the C164CM’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
During the sample time the input capacitance
internal resistance of the analog source must allow the capacitance to reach its final voltage level within
After the end of the sample time
Values for the sample time
should be used to calculate the above timings.
A/D Converter Computation Table
A/D Converter
Basic Clock
f
f
f
f
CPU
CPU
CPU
CPU
f
f
t
t
f
CPU
BC
S
C
BC
/ 4
/ 2
/ 16
/ 8
must not be exceeded when selecting ADCTC.
t
S
depend on programming and can be taken from
= 25 MHz (i.e.
=
=
=
t
S
f
t
t
, changes of the analog input voltage have no effect on the conversion result.
CPU
BC
S
f
+ 40
BC
× 8 = 1280 ns.
/4 = 6.25 MHz, i.e.
t
BC
C
+ 2
AIN
t
CPU
54
can be charged/discharged by the external source. The
t
CPU
ADCON.13|12
(ADSTC)
00
01
10
11
= 40 ns), ADCTC = ‘00’, ADSTC = ‘00’.
= (1280 + 6400 + 80) ns = 7.8 µs.
t
BC
= 160 ns.
Sample time
t
t
t
t
t
S
BC
BC
BC
BC
Table
× 8
× 16
× 32
× 64
14.
V1.0, 2001-05
C164CM
C164SM
t
S
.
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