参数资料
型号: SAK-XC2230L-12F80L
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 32-BIT, FLASH, 80 MHz, RISC MICROCONTROLLER, PQFP64
封装: 0.50 MM PITCH, GREEN, PLASTIC, LQFP-64
文件页数: 89/113页
文件大小: 3160K
代理商: SAK-XC2230L-12F80L
XC2230L, XC2234L
XC2000 Family / Econo Line
Electrical Parameters
PRELIMINARY
Data Sheet
73
V1.0, 2010-12
Sample time and conversion time of the XC223[04]L’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
= 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 12-bit:
t
C12
= 16
× t
ADCI + 2 × tSYS = 16 × 50 ns + 2 × 12.5 ns = 0.825 μs
Conversion 10-bit:
t
C10
= 12
× t
ADCI + 2 × tSYS = 12 × 50 ns + 2 × 12.5 ns = 0.625 μs
Conversion 8-bit:
t
C8
= 10
× t
ADCI + 2 × tSYS = 10 × 50 ns + 2 × 12.5 ns = 0.525 μs
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:
相关PDF资料
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SAF-XC2230L-20F66L 32-BIT, FLASH, 66 MHz, RISC MICROCONTROLLER, PQFP64
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