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DM6580 데이터시트(PDF) 10 Page - List of Unclassifed Manufacturers

부품명 DM6580
상세설명  V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set
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DM560P
V.90 Integrated Data/Fax/Voice/Speakerphone Modem Device Set
10
Preliminary
Version: DM560P-DS-P07
August 11, 2000
Auto-configuration Register: Address F400H
(continued)
* When a reset condition occurs, the I/O and
Interrupt configuration registers must be reset to the
default value according to bit 0 - bit 5.
RxDataBits Register: Address DC00H
Write only
Once the RxDataBit set to 1, the data in the RxBuffer
will be transferred to RxFiFo. The transfer bit number
is the same as the programming value ofRxDataBits
Register.
RxBuffer: Address DC01H
Write only
Receive data will be written to the RxBuffer and will
be input to the RxHDLC circuit. The RxBuffer is 16
bytes wide.
RxFiFo: Address DC01H
Read only
After the data has been passed from the RxBuffer to
the RxHDLC circuit, the RxHDLC circuit will remove
the 7eH patterns and transfer the results to the
RxFiFo. There RxFiFo is 21 bytes wide.
TxDataBits Register: Address DC02H
Write only
Data written to TxDataBits will be presented to the
TxFiFo. The data in TxFiFo will be transferred to
TXHDLC circuit. The transfer bit number is the same
as the value of TxDataBits register. If the TxFiFo is
empty, a 7e pattern will be loaded to the TxFiFo. If
TxFiFo is not empty and the data frame has the
pattern of five consecutive “1” , then the TXHDLC
circuit will insert “0” automatically.
TxFiFo Register: Address DC03H
Write only
The original HDLC frame data will be loaded to the
TxFiFo, presented to the input of the TxHDLC circuit.
The TxFiFo is 21 bytes wide.
TxBuffer: Address DC03H
Read only
According to TxDataBits, the TxHDLC circuit will
transfer the same number data bits to the TxBuffer.
The TxBuffer is 16 bytes wide.
HDLC CNTL/STATUS Register: Address DC04H
Bit0: TxReady0
0: indicates the data in the TxFiFo has deceased
to zero and the HDLC circuit has transferred
the 1
st 7eH pattern.
1: indicates that the TxFiFo data is greater than or
equal to the threshold value.
Bit1: Rxdata
0: all the data in the RxBuffer has been read.
1: Programed by software to indicate that all data
in the RxDataBits register has been written to
the RxBuffer.
Bit2: TxFiFo Threshold
0: TxFiFo threshold No. = 11
1: TxFiFo threshold No. = 16
Bit3: TxFiFo Status
0: data No. in TxFiFo >= threshold
1: data No. in TxFiFo <= threshold
Bit4: Txdata
0: A write action to TxDataBites register will clear
this bit.
1: Bit No. in TxBuffer = TxDataBits register.
Bit5: RxFiFo empty
0: data bytes No. in RxFiFo <>0
1: data bytes No. in RxFiFo = 0
Bit6: Reset
0: Normal state
1: reset HDLC circuit
In
____ buffer register: Address DC08
write only
Controller write the original data to this temp buffer.
Out
____ buffer register: Address DC08H
read only
Controller read the result data from this buffer
Status/Rst register: Address DC09H
Bit0: data ready flag (read only)
1: data has been load to out
_ buffer. (clear
automatically by a read from out
_ buffer)
0: data hasn’t been load to out
_ buffer.
Bit1: frame end flag (read only)
1: Indicate end of HDLC frame (clear by a reset
action)
Bit2: fram ready flag (read only)
1: CRC check ok.
0: CRC check fail.
Bit3: In
_ buffer empty flag


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