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參數(shù)資料
| 型號(hào)： | SDA20C440 |
| 廠(chǎng)商： | SIEMENS A G |
| 元件分類(lèi)： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, MROM, MICROCONTROLLER, PQFP80 |
| 封裝： | PLASTIC, MQFP-80 |
| 文件頁(yè)數(shù)： | 21/55頁(yè) |
| 文件大小： | 990K |
| 代理商： | SDA20C440 |
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SDA 20C440
Semiconductor Group
28
Baudrate Divider Register (Prescaler)
The divider value for the prescaler is selected with this register.
Default after reset: XXXX XX11
2.8
Analog to Digital Converter
The Analog to Digital Converter unit (ADC) provides the following features:
q
8-bit resolution
q
four multiplexed analog inputs
q
inputs for external reference voltages
q
about 17-
s conversion time, including sample and hold at 12-MHz internal operating frequency
For detailed information see chapter ‘DC-Characteristics’.
The ADC uses the principle of successive approximation by switched capacitance array.
ADC-Special Function Registers:
ADADR.0:
to be set to 1
ADR1, ADR2:
selection of the channel result to be read:
00 – channel 0 (P1.0)
01 – channel 1 (P1.1)
10 – channel 2 (P1.2)
11 – channel 3 (P1.3)
ADADR.3:
reserved, to be set to 0
ADADR.4:
reserved, to be set to 0
ADADR.5:
reserved, to be set to 0
ADADR.6:
reserved, to be set to 0
MSB
SFR-Address: C4H
LSB
SASCAL: Serial Port Prescaler
...
SCL1
SCL0
SCL 1/0
Division by
00
2
01
4
10
8
11
16
MSB
SFR-Address: 91H
LSB
ADADR: ADC-Address Register
...
ADR2
ADR1
1
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