DS3142 Datasheet, PDF (66/88 Pages) Dallas Semiconductor – Single/Dual/Triple/Quad DS3/E3 Framers

DS3141/DS3142/DS3143/DS3144 Single/Dual/Triple/Quad DS3/E3 Framers
Register Name:
Register Description:
Register Address:
TFEACA
Transmit FEAC A
64h
Bit #
7
6
5
4
3
2
1
0
Name
N/A
N/A
TFCA5 TFCA4 TFCA3 TFCA2 TFCA1 TFCA0
Default
—
—
0
0
0
0
0
0
Bits 0 to 5: Transmit FEAC Codeword A Data (TFCA[5:0]). The FEAC codeword is of the form
…0xxxxxx011111111… where the rightmost bit is transmitted first. TFCA[5:0] are the middle six bits of the second
byte of the FEAC codeword (i.e., the six “x” bits). The transmit FEAC controller can generate two different
codewords. These six bits specify what is to be transmitted for codeword A. TFCA0 is the LSB and is transmitted
first; TFCA5 is the MSB and is transmitted last. The TFS[1:0] control bits determine if this codeword is to be
transmitted. These bits should only be changed when the transmit FEAC controller is in the idle state
(TFS[1:0] = 00).
Register Name:
Register Description:
Register Address:
TFEACB
Transmit FEAC B
65h
Bit #
7
6
5
4
3
2
1
0
Name
N/A
N/A
TFCB5 TFCB4 TFCB3 TFCB2 TFCB1 TFCB0
Default
—
—
0
0
0
0
0
0
Bits 0 to 5: Transmit FEAC Codeword B Data (TFCB[5:0]). The FEAC codeword is of the form
…0xxxxxx011111111… where the rightmost bit is transmitted first. TFCB[5:0] are the middle six bits of the second
byte of the FEAC codeword (i.e., the six “x” bits). The transmit FEAC controller can generate two different
codewords. These six bits specify what is to be transmitted for codeword B. TFCB0 is the LSB and is transmitted
first; TFCB5 is the MSB and is transmitted last. The TFS[1:0] control bits determine if this codeword is to be
transmitted. These bits should only be changed when the transmit FEAC controller is in the idle state
(TFS[1:0] = 00).
Register Name:
Register Description:
Register Address:
RFEAC
Receive FEAC
66h
Bit #
7
6
5
4
3
2
1
0
Name
N/A
N/A
RFF5
RFF4
RFF3
RFF2
RFF1
RFF0
Default
—
—
—
—
—
—
—
—
Bits 0 to 5: Receive FEAC FIFO Data (RFF[5:0]). Data from the receive FEAC FIFO can be read from these bits.
The FEAC codeword is of the form …0xxxxxx011111111… where the rightmost bit is received first. These six bits
are the debounced and integrated middle six bits of the second byte of the FEAC codeword (i.e., the six “x” bits).
RFF0 is the LSB and is received first; RFF5 is the MSB and is received last.
66 of 88