sab-c161ji-lf Infineon Technologies Corporation, sab-c161ji-lf Datasheet - Page 67

• Manufacturer Part Number: sab-c161ji-lf
• Description: 16-bit Single-chip Microcontroller
• Manufacturer: Infineon Technologies Corporation

8)
Sample time and conversion time of the C161CS/JC/JI’s A/D Converter are
programmable.
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
result.
Values for the sample time
A/D Converter Computation Table
Table 14
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
should be used to calculate the above timings.
depend on programming and can be taken from
= 25 MHz (i.e.
=
=
=
f
t
t
CPU
BC
S
t
S
, changes of the analog input voltage have no effect on the conversion
+ 40
f
BC
/ 4 = 6.25 MHz, i.e.
8 = 1280 ns.
t
BC
C
+ 2
AIN
t
CPU
63
can be charged/discharged by the external source. The
t
ADCON.13|12
(ADSTC)
00
01
10
11
CPU
= 40 ns), ADCTC = ‘00’, ADSTC = ‘00’.
= (1280 + 6400 + 80) ns = 7.8 s.
t
BC
= 160 ns.
Sample time
t
t
t
t
t
S
BC
BC
BC
BC
Table
C161CS/JC/JI-32R
8
16
32
64
C161CS/JC/JI-L
14.
V3.0, 2001-01
t
S
.