參數(shù)資料
型號(hào)： ADUC7021BCP32
廠商： ANALOG DEVICES INC
元件分類： 微控制器/微處理器
英文描述： Precision Analog Microcontroller 12-bit Analog I/O, ARM7TDMI MCU
中文描述： 32-BIT, FLASH, 45.5 MHz, MICROCONTROLLER, QCC40
封裝： 6 X 6 MM, MO-220VJJD-2, LFCSP-40
文件頁數(shù)： 55/80頁
文件大?。?/td> 840K
代理商： ADUC7021BCP32
Preliminary Technical Data
ADuC702x Series
Rev. PrB | Page 55 of 80
Table 41: COMCON1 MMR Bit Descriptions
Description
Reserved
Loop back
Set by user to enable loop back mode. In loop back mode the SOUT is forced high. Also the modem
signals are directly connected to the status inputs (RTS to CTS, DTR to DSR, OUT1 to RI and OUT2 to
DCD)
Request to send
Set by user to force the RTS output to 0
Cleared by user to force the RTS output to 1
Data terminal ready
Set by user to force the DTR output to 0
Cleared by user to force the DTR output to 1
Bit
7-5
4
Name
LOOPBACK
1
RTS
0
DTR
Table 42: COMSTA1 MMR Bit Descriptions
Bit
7
6
5
4
3
Name
DCD
RI
DSR
CTS
DDCD
Description
Data carrier detect
Ring indicator
Data set ready
Clear to send
Delta DCD
Set automatically if DCD changed state since COMSTA1 last read
Cleared automatically by reading COMSTA1
Trailing edge RI
Set if NRI changed from 0 to 1 since COMSTA1 last read
Cleared automatically by reading COMSTA1
Delta DSR
Set automatically if DSR changed state since COMSTA1 last read
Cleared automatically by reading COMSTA1
Delta CTS
Set automatically if CTS changed state since COMSTA1 last read
Cleared automatically by reading COMSTA1
2
TERI
1
DDSR
0
DCTS
Table 43: COMDIV2 MMR Bit Descriptions
Bit
15
Name
FBEN
Description
Fractional baudrate generator enable bit
Set by user to enable the fractional baudrate generator
Cleared by user to generate baudrate using the standard 450 UART baudrate generator
Reserved
M. if FBM = 0, M = 4
N
14-13
12-11
10-0
FBM[1-0]
FBN[10-0]
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