ds21ft40 Maxim Integrated Products, Inc., ds21ft40 Datasheet - Page 35

• Manufacturer Part Number: ds21ft40
• Description: Ds21ft40 Four X Three 12 Channel E1 Framer
• Manufacturer: Maxim Integrated Products, Inc.

RIR: RECEIVE INFORMATION REGISTER (Address=08 Hex)
SSR: SYNCHRONIZER STATUS REGISTER (Address=1E Hex)
(MSB)
(MSB)
CSC5
TESF
SYMBOLS
SYMBOLS
SYMBOLS
CRC4SA
CRCRC
CASRC
FASRC
CASSA
FASSA
TESE
RESF
RESE
CSC5
CSC4
CSC3
CSC2
CSC0
TESF
F0SR
–
TESE
CSC4
POSITION
POSITION
POSITION
SSR.7
SSR.6
SSR.5
SSR.4
SSR.3
SSR.2
SSR.1
SSR.0
RIR.7
RIR.6
RIR.5
RIR.4
RIR.3
RIR.2
RIR.1
RIR.0
ISR.0
CSC3
–
NAME AND DESCRIPTION
NAME AND DESCRIPTION
CRC Resync Criteria Met. Set when 915/1000 code words are
FAS Resync Criteria Met. Set when 3 consecutive FAS words
CAS Resync Criteria Met. Set when 2 consecutive CAS MF
NAME AND DESCRIPTION
CRC4 Sync Counter Bit 5. MSB of the 6–bit counter.
CRC4 Sync Counter Bit 4.
CRC4 Sync Counter Bit 3.
CRC4 Sync Counter Bit 2.
CRC4 Sync Counter Bit 0. LSB of the 6–bit counter. The next
FAS Sync Active. Set while the synchronizer is searching for
CAS MF Sync Active. Set while the synchronizer is searching
CRC4 MF Sync Active. Set while the synchronizer is
1 = Interrupt request pending.
FRAMER 0 SR1 or SR2 INTERRUPT REQUEST.
0 = No interrupt request pending.
1 = Interrupt request pending.
Transmit Side Elastic Store Full. Set when the transmit side
elastic store buffer fills and a frame is deleted.
Transmit Side Elastic Store Empty. Set when the transmit side
elastic store buffer empties and a frame is repeated.
Not Assigned. Could be any value.
Receive Side Elastic Store Full. Set when the receive side
elastic store buffer fills and a frame is deleted.
Receive Side Elastic Store Empty. Set when the receive side
elastic store buffer empties and a frame is repeated.
received in error.
are received in error.
alignment words are received in error.
to LSB is not accessible.
alignment at the FAS level.
for the CAS MF alignment word.
searching for the CRC4 MF alignment word.
CSC2
RESF
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RESE
CSC0
CRCRC
FASSA
CASSA
FASRC
CRC4SA
CASRC
(LSB)
(LSB)
DS21FT40