參數(shù)資料
型號(hào): SDA20C440
廠商: SIEMENS A G
元件分類: 微控制器/微處理器
英文描述: 8-BIT, MROM, MICROCONTROLLER, PQFP80
封裝: PLASTIC, MQFP-80
文件頁數(shù): 22/55頁
文件大?。?/td> 990K
代理商: SDA20C440
SDA 20C440
Semiconductor Group
29
ADADR.7:
reserved, to be set to 0
Default after reset: XXXX X00X
DAT0 … 7:
conversion result of the channel addressed by ADADR
Default after reset:
XXXX XXXX
MX1, MX0:
Selection of the analog input:
00 – channel 0 (P1.0)
01 – channel 1 (P1.1)
10 – channel 2 (P1.2)
11 – channel 3 (P1.3)
MX2:
= 1 deselects all channels
Deselected channels may be used as digital inputs (Port 1)
EOC:
End of Conversion;
set by ADC after completion of a conversion, to be cleared by software
ADS:
ADC Start; setting to 1 starts a conversion, reset by hardware after the end of
a conversion
BSY:
Busy Bit; a ‘1’ indicates, that a conversion is in progress or that the result has
not been read yet
ADCON.3/5:
reserved, to be set to 0
Default after reset:
00X0 XX00
This register is bit-addressable.
LCD-Matrix Controller
For the use of multiplexed Liquid Crystal Displays, the processor provides an LCD-control module,
which allows to connect a multiplex driven LCD. The module communicates with the CPU via an
interface and all settings are done by writing to special function registers. An overview of this
module is given in figure 4.
The device can be used for 8-line or 16-line multiplexing drive as shown in figures 5 to 7.
MSB
SFR-Address: 92H
LSB
ADDAT: ADC-Data Register
DAT7
DAT6
DAT5
DAT4
DAT3
DAT2
DAT1
DAT0
MSB
SFR-Address: 90H
LSB
ADCON: ADC-Control Register
BSY
ADS
EOC
MX2
MX1
MX0
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