参数资料
型号: SAX-XC878M-13FFI5V
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 24 MHz, RISC MICROCONTROLLER, PQFP64
封装: PLASTIC, TQFP-64
文件页数: 11/141页
文件大小: 2385K
代理商: SAX-XC878M-13FFI5V
XC878CLM
Functional Description
Data Sheet
101
V1.1, 2009-08
Figure 30
ADC Clocking Scheme
For module clock
f
ADC = 24 MHz, the analog clock fADCI frequency can be selected as
shown in Table 34.
During slow-down mode,
f
ADC may be reduced further, for example, to 12 MHz or 6 MHz.
However, it is important to note that the conversion error could increase due to loss of
charges on the capacitors, if
f
ADC becomes too low during slow-down mode.
3.22.2
ADC Conversion Sequence
The analog-to-digital conversion procedure consists of the following phases:
Table 34
f
ADCI Frequency Selection
Module Clock
f
ADC
CTC
Prescaling Ratio
Analog Clock
f
ADCI
24 MHz
00B
÷2
12 MHz
01B
÷3
8MHz
10B
÷4
6MHz
11B (default)
÷ 32
750 kHz
analog
components
fADCI
fADC = fPCLK
MUX
arbiter
registers
interrupts
analog part
digital part
fADCD
fADCA
32
÷
4
÷
3
÷
clock prescaler
CTC
2
÷
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