參數資料
型號： SAH-XC2712X-8F66R
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PDSO38
封裝： 0.50 MM PITCH, GREEN, PLASTIC, TSSOP-38
文件頁數： 70/103頁
文件大小： 2957K
代理商： SAH-XC2712X-8F66R
XC2712X
XC2000 Family / Compact Line
Electrical Parameters
PRELIMINARY
Data Sheet
65
V1.0, 2010-12
Sample time and conversion time of the XC2712X’s A/D converters are programmable.
The timing above can be calculated using Table 21.
The limit values for
f
ADCI must not be exceeded when selecting the prescaler value.
Converter Timing Example A:
Converter Timing Example B:
Table 21
A/D Converter Computation Table
GLOBCTR.5-0
(DIVA)
A/D Converter
Analog Clock
f
ADCI
INPCRx.7-0
(STC)
Sample Time1)
t
S
1) The selected sample time is doubled if broken wire detection is active (due to the presampling phase).
000000B
f
SYS
00H
t
ADCI × 2
000001B
f
SYS / 2
01H
t
ADCI × 3
000010B
f
SYS / 3
02H
t
ADCI × 4
:
f
SYS / (DIVA+1)
:
t
ADCI × (STC+2)
111110B
f
SYS / 63
FEH
t
ADCI × 256
111111B
f
SYS / 64
FFH
t
ADCI × 257
Assumptions:
f
SYS
= 66 MHz (i.e.
t
SYS = 15.2 ns), DIVA = 03H, STC = 00H
Analog clock
f
ADCI
=
f
SYS / 4 = 16.5 MHz, i.e. tADCI = 60.6 ns
Sample time
t
S
=
t
ADCI × 2 = 121.2 ns
Conversion 12-bit:
t
C12
= 16
× t
ADCI + 2 × tSYS = 16 × 60.6 ns + 2 × 15.2 ns = 1.0 μs
Conversion 10-bit:
t
C10
= 12
× t
ADCI + 2 × tSYS = 12 × 60.6 ns + 2 × 15.2 ns = 0.758 μs
Conversion 8-bit:
t
C8
= 10
× t
ADCI + 2 × tSYS = 10 × 60.6 ns + 2 × 15.2 ns = 0.636 μs
Assumptions:
f
SYS
= 40 MHz (i.e.
t
SYS = 25 ns), DIVA = 01H, STC = 00H
Analog clock
f
ADCI
=
f
SYS / 2 = 20 MHz, i.e. tADCI = 50 ns
Sample time
t
S
=
t
ADCI × 2 = 100 ns
Conversion 12-bit:
t
C12
= 16
× t
ADCI + 2 × tSYS = 16 × 50 ns + 2 × 25 ns = 0.85 μs
Conversion 10-bit:
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