參數(shù)資料
型號： SAF-XC2264N-16F40L
廠商： INFINEON TECHNOLOGIES AG
元件分類： 微控制器/微處理器
英文描述： 32-BIT, FLASH, 40 MHz, RISC MICROCONTROLLER, PQFP100
封裝： 0.50 MM PITCH, GREEN, PLASTIC, LQFP-100
文件頁數(shù)： 123/131頁
文件大?。?/td> 1627K
代理商： SAF-XC2264N-16F40L
XC2261N/68N, XC2263N/64N/65N
XC2000 Family / Value Line
Electrical Parameters
Data Sheet
91
V1.4, 2011-07
Sample time and conversion time of the XC226xN’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 Time
1)
t
S
1) The selected sample time is doubled if broken wire detection is active (due to the presampling phase).
000000
B
f
SYS
00
H
t
ADCI × 2
000001
B
f
SYS / 2
01
H
t
ADCI × 3
000010
B
f
SYS / 3
02
H
t
ADCI × 4
:
f
SYS / (DIVA+1)
:
t
ADCI × (STC+2)
111110
B
f
SYS / 63
FE
H
t
ADCI × 256
111111
B
f
SYS / 64
FF
H
t
ADCI × 257
Assumptions:
f
SYS
= 80 MHz (i.e.
t
SYS = 12.5 ns), DIVA = 03H, STC = 00H
Analog clock
f
ADCI
=
f
SYS / 4 = 20 MHz, i.e. tADCI = 50 ns
Sample time
t
S
=
t
ADCI × 2 = 100 ns
Conversion 10-bit:
t
C10
= 13
× t
ADCI + 2 × tSYS = 13 × 50 ns + 2 × 12.5 ns = 0.675 μs
Conversion 8-bit:
t
C8
= 11
× t
ADCI + 2 × tSYS = 11 × 50 ns + 2 × 12.5 ns = 0.575 μs
Assumptions:
f
SYS
= 40 MHz (i.e.
t
SYS = 25 ns), DIVA = 02H, STC = 03H
Analog clock
f
ADCI
=
f
SYS / 3 = 13.3 MHz, i.e. tADCI = 75 ns
Sample time
t
S
=
t
ADCI × 5 = 375 ns
Conversion 10-bit:
t
C10
= 16
× t
ADCI + 2 × tSYS = 16 × 75 ns + 2 × 25 ns = 1.25 μs
Conversion 8-bit:
t
C8
= 14
× t
ADCI + 2 × tSYS = 14 × 75 ns + 2 × 25 ns = 1.10 μs
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