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XC164CS-32F_06 Datasheet, PDF (64/81 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core | |||
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XC164-32
Derivatives
Electrical Parameters
Sample time and conversion time of the XC164CSâs A/D Converter are programmable.
In compatibility mode, the above timing can be calculated using Table 15.
The limit values for fBC must not be exceeded when selecting ADCTC.
Table 15 A/D Converter Computation Table1)
ADCON.15|14
(ADCTC)
A/D Converter
Basic Clock fBC
ADCON.13|12 Sample Time
(ADSTC)
tS
00
fSYS / 4
00
tBC Ã 8
01
fSYS / 2
01
tBC Ã 16
10
fSYS / 16
10
tBC Ã 32
11
fSYS / 8
11
tBC Ã 64
1) These selections are available in compatibility mode. An improved mechanism to control the ADC input clock
can be selected.
Converter Timing Example:
Assumptions: fSYS
Basic clock
fBC
Sample time
tS
Conversion 10-bit:
With post-calibr. tC10P
Post-calibr. off tC10
Conversion 8-bit:
With post-calibr. tC8P
Post-calibr. off tC8
= 40 MHz (i.e. tSYS = 25 ns), ADCTC = â01â, ADSTC = â00â
= fSYS / 2 = 20 MHz, i.e. tBC = 50 ns
= tBC Ã 8 = 400 ns
= 52 à tBC + tS + 6 à tSYS = (2600 + 400 + 150) ns = 3.15 µs
= 40 à tBC + tS + 6 à tSYS = (2000 + 400 + 150) ns = 2.55 µs
= 44 à tBC + tS + 6 à tSYS = (2200 + 400 + 150) ns = 2.75 µs
= 32 à tBC + tS + 6 à tSYS = (1600 + 400 + 150) ns = 2.15 µs
Data Sheet
62
V1.1, 2006-08
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