參數(shù)資料
型號(hào): DS2152LN
廠商: DALLAS SEMICONDUCTOR
元件分類: Digital Transmission Controller
英文描述: DATACOM, FRAMER, PQFP100
封裝: LQFP-100
文件頁數(shù): 3/94頁
文件大小: 1003K
代理商: DS2152LN
DS2152
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Receive Channel Block [RCHBLK]. A user-programmable output that can be forced high or low during
any of the 24 T1 channels. Synchronous with RCLK when the receive side elastic store is disabled.
Synchronous with RSYSCLK when the receive side elastic store is enabled. Useful for blocking clocks to
a serial UART or LAPD controller in applications where not all T1 channels are used, such as Fractional
T1, 384 kbps service, 768 kbps, or ISDN-PRI. Also useful for locating individual channels in drop-and-
insert applications, for external per-channel loopback, and for per-channel conditioning. See Section 9 for
details.
Receive Serial Data [RSER]. Received NRZ serial data. Updated on rising edges of RCLK when the
receive side elastic store is disabled. Updated on the rising edges of RSYSCLK when the receive side
elastic store is enabled.
Receive Sync [RSYNC]. An extracted pulse, one RCLK wide, is output at this pin which identifies either
frame (RCR2.4=0) or multiframe (RCR2.4=1) boundaries. If set to output frame boundaries then via
RCR2.5, RSYNC can also be set to output double-wide pulses on signaling frames. If the receive side
elastic store is enabled via CCR1.2, then this pin can be enabled to be an input via RCR2.3 at which a
frame or multiframe boundary pulse is applied. See Section 15 for details.
Receive Frame Sync [RFSYNC]. An extracted 8 kHz pulse 1 RCLK wide is output at this pin which
identifies frame boundaries.
Receive Multiframe Sync [RMSYNC]. Only used when the receive side elastic store is enabled. An
extracted pulse, 1 RSYSCLK wide, is output at this pin which identifies multiframe boundaries. If the
receive side elastic store is disabled, then this output will output multiframe boundaries associated with
RCLK.
Receive Data [RDATA]. Updated on the rising edge of RCLK with the data out of the receive side
framer.
Receive System Clock [RSYSCLK]. 1.544 MHz or 2.048 MHz clock. Only used when the elastic store
function is enabled. Should be tied low in applications that do not use the elastic store. Can be burst at
rates up to 8.192 MHz.
Receive Signaling Output [RSIG]. Outputs signaling bits in a PCM format. Updated on rising edges of
RCLK when the receive side elastic store is disabled. Updated on the rising edges of RSYSCLK when the
receive side elastic store is enabled.
Receive Loss of Sync / Loss of Transmit Clock [RLOS/LOTC]. A dual function output that is
controlled by the CCR3.5 control bit. This pin can be programmed to either toggle high when the
synchronizer is searching for the frame and multiframe or to toggle high if the TCLK pin has not been
toggled for 5
s.
Receive Carrier Loss [RCL]. Set high when the line interface detects a loss of carrier.
Receive Signaling Freeze [RSIGF]. Set high when the signaling data is frozen via either automatic or
manual intervention. Used to alert downstream equipment of the condition.
8 MHz Clock [8MCLK]. A 8.192 MHz output clock that is referenced to the clock that is output at the
RCLK pin and is used to clock data through the receive side framer.
相關(guān)PDF資料
PDF描述
DS2152L DATACOM, FRAMER, PQFP100
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DS21554L DATACOM, PCM TRANSCEIVER, PQFP100
DS21554LN DATACOM, PCM TRANSCEIVER, PQFP100
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