XC164SM_07 Datasheet, PDF (57/67 Pages) Infineon Technologies AG – 16-Bit Single-Chip Microcontroller with C166SV2 Core

XC164SM
Derivatives
Electrical Parameters
Sample time and conversion time of the XC164SM’s A/D Converter are programmable.
In compatibility mode, the above timing can be calculated using Table 15.
The limit values for f_BC must not be exceeded when selecting ADCTC.
Table 15 A/D Converter Computation Table¹⁾
ADCON.15|14 A/D Converter
ADCON.13|12 Sample Time
(ADCTC)
Basic Clock f_BC
(ADSTC)
t_S
00
f_SYS / 4
00
t_BC × 8
01
f_SYS / 2
01
t_BC × 16
10
f_SYS / 16
10
t_BC × 32
11
f_SYS / 8
11
t_BC × 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: f_SYS
Basic clock
f_BC
Sample time
t_S
Conversion 10-bit:
With post-calibr. t_C10P
Post-calibr. off t_C10
Conversion 8-bit:
With post-calibr. t_C8P
Post-calibr. off t_C8
= 40 MHz (i.e. t_SYS = 25 ns), ADCTC = ‘01’, ADSTC = ‘00’
= f_SYS / 2 = 20 MHz, i.e. t_BC = 50 ns
= t_BC × 8 = 400 ns
= 52 × t_BC + t_S + 6 × t_SYS = (2600 + 400 + 150) ns = 3.15 μs
= 40 × t_BC + t_S + 6 × t_SYS = (2000 + 400 + 150) ns = 2.55 μs
= 44 × t_BC + t_S + 6 × t_SYS = (2200 + 400 + 150) ns = 2.75 μs
= 32 × t_BC + t_S + 6 × t_SYS = (1600 + 400 + 150) ns = 2.15 μs
Data Sheet
55
V1.2, 2007-03