參數(shù)資料
型號(hào): SAL-XC866L-4FRA
廠商: INFINEON TECHNOLOGIES AG
元件分類: 微控制器/微處理器
英文描述: 8-BIT, FLASH, 75 MHz, MICROCONTROLLER, PDSO38
封裝: GREEN, PLASTIC, TSSOP-38
文件頁(yè)數(shù): 99/113頁(yè)
文件大小: 2289K
代理商: SAL-XC866L-4FRA
SAL-XC866
Functional Description
PRELIMINARY
Data Sheet
82
V1.0, 2011-02
For module clock fADC = 25 MHz, the analog clock fADCI frequency can be selected as
shown in Table 29.
As fADCI cannot exceed 10 MHz, bit field CTC should not be set to 00B when fADC is
25 MHz. During slow-down mode where fADC may be reduced to 12.5 MHz, 6.25 MHz
etc., CTC can be set to 00B as long as the divided analog clock fADCI does not exceed
10 MHz. However, it is important to note that the conversion error could increase due to
loss of charges on the capacitors, if fADC becomes too low during slow-down mode.
3.18.2
ADC Conversion Sequence
The analog-to-digital conversion procedure consists of the following phases:
Synchronization phase (tSYN)
Sample phase (tS)
Conversion phase
Write result phase (tWR)
Figure 33
ADC Conversion Timing
Table 29
fADCI Frequency Selection
Module Clock fADC
CTC
Prescaling Ratio
Analog Clock fADCI
25 MHz
00B
÷ 2
12.5 MHz (N.A)
01B
÷3
8.3MHz
10B
÷4
6.3MHz
11B (default)
÷ 32
781.3 kHz
t
S
t
CONV
t
WR
SAMPLE Bit
BUSY Bit
Conversion Phase
Sample Phase
Write Result Phase
conversion start
trigger
Source
interrupt
Result
interrupt
t
SYN
Channel
interrupt
f
ADCI
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