www.maxim-ic.com This application note applies following single-chip t
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www.maxim-ic.com This application note applies following single-chip transceivers: (T1) DS21352, DS21552, DS21Q352, DS21Q552; (E1) DS21354, DS21554, DS21Q354, DS21Q554; (combination) DS2155, DS2156, DS21Q55, DS21Q56.
line interface unit (LIU) completely decoupled from framer/formatter interface optical, HDSL, other devices with interface. then used corrupt data, insert framing errors, insert errors, etc. framer/formatter generate/detect either bipolar data format (determined bit). Table shows register settings output data format. Figures show interface framer/formatter devices with bipolar data modes. When receive side interfaced device with data format, OR-gate must added convert bipolar data format into NRZ. Figures both data mode applications. Table Output Data Format (ODF) Register Settings DS21352/552/Q352/Q552 CCR1: Common Control Register (Address Hex)
TESE RSAO TSCLKM RSCLKM RESE FUNCTION Bipolar data data
DS21354/554/Q354/Q554 TCR1: Transmit Control Register (Address Hex)
TFPT T16S TUA1 TSiS TSA1 TSIO FUNCTION Bipolar data data
DS2155/56/Q55/Q56 IOCR1: Configuration Register (Address Hex)
RSMS RSMS2 RSMS1 RSIO TSDW TSIO FUNCTION Bipolar data data
DS2155/56 provides software control separate connect LIU/framer when LIUC hardwired high. LIUC connected low, then LIUC effect (Table DS2155/56/Q55/Q56 LBCR Loopback Control Register (Address Hex)
LIUC FUNCTION LIUC control
083002
AN391
Table Control
LIUC LIUC FUNCTION framer separated framer separated framer connected framer separated
Figure Framer Connection Bipolar Mode Device DEVICE
RX_CLKO RX_POSO RX_NEGO
FRAMER
RCLKI RPOSI RNEGI RCLK RSER RSYNC
BIPOLAR
TX_CLKI TX_POSI TX_NEGI TCLKO TPOSO TNEGO TCLK TSER TSYNC
INTERFACE
Figure Framer Connection Mode Device DEVICE
RX_CLK RX_OUT
FRAMER
RCLKI RPOSI RNEGI RCLK RSER RSYNC
TX_CLK TX_IN TCLKO TPOSO TNEGO TCLK TSER TSYNC
INTERFACE
AN391
Figure Connection Bipolar Device
RCLKO
DEVICE
RX_CLKI RX_POSI RX_NEGI
RPOSO RNEGO
NETWORK
TCLKI
BIPOLAR
TX_CLKO TX_POSO TX_NEGO
TPOSI TNEGI
Figure Connection Mode Device
RCLKO
DEVICE
RX_CLK
RPOSO RNEGO
RX_IN
NETWORK
TCLKI
TX_CLK
TPOSI TNEGI TX_OUT
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