Receive Side Pins - Dallas Semiconductor DS21354L Manual

4.1.2 Receive Side Pins

Signal Name:
Signal Description:
Signal Type:
Updated with the full recovered E1 data stream on the rising edge of RCLK.
Signal Name:
Signal Description:
Signal Type:
4 kHz to 20 kHz clock (Sa bits) for the RLINK output. See Section 15 for details.
Signal Name:
Signal Description:
Signal Type:
2.048 MHz clock that is used to clock data through the receive side framer.
Signal Name:
Signal Description:
Signal Type:
A 256 kHz clock which pulses high during the LSB of each channel. Synchronous with RCLK when the
receive side elastic store is disabled. Synchronous with RSYSCLK when the receive side elastic store is
enabled. Useful for parallel to serial conversion of channel data.
Signal Name:
Signal Description:
Signal Type:
A user programmable output that can be forced high or low during any of the 32 E1 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 E1 channels are used such as Fractional E1, 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 12 for details.
Signal Name:
Signal Description:
Signal Type:
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.
Signal Name:
Signal Description:
Signal Type:
An extracted pulse, one RCLK wide, is output at this pin which identifies either frame or CAS/CRC
multiframe boundaries. If the receive side elastic store is enabled, then this pin can be enabled to be an
input at which a frame or multiframe boundary pulse synchronous with RSYSCLK is applied.
RLINK
Receive Link Data
Output
RLCLK
Receive Link Clock
Output
RCLK
Receive Clock
Output
RCHCLK
Receive Channel Clock
Output
RCHBLK
Receive Channel Block
Output
RSER
Receive Serial Data
Output
RSYNC
Receive Sync
Input/Output
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DS21354 & DS21554