参数资料
型号: SAF-XC866-2FRA
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, FLASH, 26.7 MHz, MICROCONTROLLER, PDSO38
封装: PLASTIC, GREEN, TSSOP-38
文件页数: 102/116页
文件大小: 1640K
代理商: SAF-XC866-2FRA
XC866
Functional Description
Data Sheet
82
V1.2, 2007-10
For module clock fADC = 26.7 MHz, the analog clock fADCI frequency can be selected as
shown in Table 30.
As fADCI cannot exceed 10 MHz, bit field CTC should not be set to 00B when fADC is
26.7 MHz. During slow-down mode where fADC may be reduced to 13.3 MHz, 6.7 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 34
ADC Conversion Timing
Table 30
fADCI Frequency Selection
Module Clock fADC
CTC
Prescaling Ratio
Analog Clock fADCI
26.7 MHz
00B
÷ 2
13.3 MHz (N.A)
01B
÷3
8.9MHz
10B
÷4
6.7MHz
11B (default)
÷ 32
833.3 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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