参数资料
型号: SAB-C505CA-2R20M
厂商: INFINEON TECHNOLOGIES AG
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
封装: PLASTIC, MQFP-44
文件页数: 39/88页
文件大小: 1013K
代理商: SAB-C505CA-2R20M
C505/C505C/C505A/C505CA
Data Sheet
40
12.00
10-Bit A/D Converter (C505A and C505CA only)
The C505A/C505CA includes a high performance / high speed 10-bit A/D-Converter (ADC) with 8
analog input channels. It operates with a successive approximation technique and uses self
calibration mechanisms for reduction and compensation of offset and linearity errors. The A/D
converter provides the following features:
– 8 multiplexed input channels (port 1), which can also be used as digital inputs/outputs
– 10-bit resolution
– Single or continuous conversion mode
– Internal start-of-conversion trigger capability
– Interrupt request generation after each conversion
– Using successive approximation conversion technique via a capacitor array
– Built-in hidden calibration of offset and linearity errors
The 10-bit ADC uses two clock signals for operation : the conversion clock fADC (=1/tADC) and the
input clock fIN (=1/tIN). fADC is derived from the C505 system clock fOSC which is applied at the
XTAL pins. The input clock fIN is equal to fOSC The conversion fADC clock is limited to a maximum
frequency of 2 MHz. Therefore, the ADC clock prescaler must be programmed to a value which
assures that the conversion clock does not exceed 2 MHz. The prescaler ratio is selected by the
bits ADCL1 and ADCL0 of SFR ADCON1.
Figure 19
10-Bit A/D Converter Clock Selection
MCS03635
f OSC
MUX
Clock Prescaler
Conversion Clock
Input Clock
f ADC
IN
f
ADCL1
A / D
Converter
Condition: ADC max
f
< 2 MHz
IN
f
= f OSC =
CLP
1
32
8
4
16
ADCL0
MCU System Clock
Rate (fOSC)
fIN
[MHz]
Prescaler
Ratio
fADC
[MHz]
ADCL1
ADCL0
2 MHz
2
÷ 4
0.5
0
6 MHz
6
÷ 4
1.5
0
8 MHz
8
÷ 4
200
12 MHz
12
÷ 8
1.5
0
1
16 MHz
16
÷ 8
201
20 MHz
20
÷ 16
1.25
1
0
相关PDF资料
PDF描述
SAB-C505CA-4R16M 8-BIT, MROM, 16 MHz, MICROCONTROLLER, PQFP44
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SAK-C505A-4E16M 8-BIT, OTPROM, 16 MHz, MICROCONTROLLER, PQFP44
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