DS2154 Dallas Semiconducotr, DS2154 Datasheet - Page 37

• Manufacturer Part Number: DS2154
• Description: Enhanced E1 Single Chip Transceiver
• Manufacturer: Dallas Semiconducotr

SR2: STATUS REGISTER 2 (Address=07 Hex)
(MSB)
RMF
SYMBOL
RCMF
TSLIP
LOTC
RMF
TMF
RAF
SEC
TAF
RAF
POSITION
SR2.7
SR2.6
SR2.5
SR2.4
SR2.3
SR2.2
SR2.1
SR2.0
TMF
NAME AND DESCRIPTION
Receive CAS Multiframe. Set every 2 ms (regardless if CAS
signaling is enabled or not) on receive multiframe boundaries.
Used to alert the host that signaling data is available.
Receive Align Frame. Set every 250 s at the beginning of
align frames. Used to alert the host that Si and Sa bits are
available in the RAF and RNAF registers.
Transmit Multiframe. Set every 2 ms (regardless if CRC4 is
enabled) on transmit multiframe boundaries. Used to alert the
host that signaling data needs to be updated.
1-Second Timer. Set on increments of 1 second based on
RCLK. If CCR2.7=1, then this bit will be set every 62.5 ms
instead of once a second.
Transmit Align Frame. Set every 250 s at the beginning of
align frames. Used to alert the host that the TAF and TNAF
registers need to be updated.
Loss of Transmit Clock. Set when the TCLK pin has not
transitioned for one channel time (or 3.9 s). Will force the
LOTC pin high if enabled via TCR2.0.
Receive CRC4 Multiframe. Set on CRC4 multiframe
boundaries; will continue to be set every 2 ms on an arbitrary
boundary if CRC4 is disabled.
Transmit Elastic Store Slip. Set when the elastic store has
either repeated or deleted a frame of data.
SEC
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TAF
LOTC
RCMF
TSLIP
(LSB)
DS2154