BT8375 CONEXANT [Conexant Systems, Inc], BT8375 Datasheet - Page 136
BT8375
Manufacturer Part Number
BT8375
Description
single chip transceivers for T1/E1 and Integrated Service Digital Network (ISDN) primary rate interfaces
Manufacturer
CONEXANT [Conexant Systems, Inc]
Datasheet
1.BT8375.pdf
(323 pages)
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3.0 Registers
3.4 Interrupt Status Registers
All events in ISR5 are from rising edge sources. Each event is latched active-high and held according to the
LATCH_ERR bit [addr 046] and triggers an interrupt if the corresponding IER5 bit is enabled [addr 00E].
TSLIP
RSLIP
CKERR
JERR
CERR
SERR
MERR
FERR
3-18
006—Error Interrupt Status (ISR5)
TSLIP
7
Transmit Slip Error—Two types of TSLIP buffer errors are reported, TFSLIP or TUSLIP. The
error type is reported separately in slip status [SSTAT; 0D9].
Receive Slip Error—Two types of RSLIP buffer errors are reported, RFSLIP or RUSLIP. The
error type is reported separately in slip status [SSTAT; 0D9].
CLAD Phase Detector or JCLK Acceleration Error—Reports JCLK acceleration/deceleration
(enabled by JAUTO bit; addr 002).
Jitter Attenuator Elastic Store Limit Error—Indicates the transmit (TJAT) or receive (RJAT)
jitter attenuator elastic store has under-run or overflowed its programmed depth [JSIZE;
addr 002]. Error type is reported separately in JMPTY [addr 021]. JAT elastic store is
automatically re-centered each time JERR occurs, causing an uncontrolled data slip on the
elastic store output.
CRC6/CRC4 Block Error—Applicable to ESF and MFAS modes only; read 0 in other modes.
CERR indicates 1 or more bit errors found in the received CRC-6 or CRC-4 checksum block
pattern.
CAS Pattern Error—Applicable only in E1 mode; read 0 in T1 mode. SERR indicates 1 or
more bit errors found in received TS16 Multiframe Alignment Signal (MAS).
MFAS Pattern Error—Applicable only in E1 mode; read 0 in T1 mode. Indicates 1 or more bit
errors found in received MFAS alignment pattern.
Frame Error—Ft/Fs/T1DM/FPS/FAS Pattern Error. Indicates 1 or more Ft/Fs/FPS frame bit
errors or FAS pattern errors found. Refer to
frame bits are monitored according to the selected receive framer mode.
RSLIP
6
CKERR
CKERR
5
X
0
1
0 = no error
1 = TSLIP error
0 = no error
1 = RSLIP error
0 = no error
1 = uncontrolled JAT data slip
0 = no error
1 = CRC error
0 = no error
1 = CAS error
0 = no error
1 = MFAS error
0 = no error
1 = frame error
JAUTO
JERR
0
1
1
4
Conexant
CKERR disabled
No error
JCLK acceleration active
JCLK Acceleration
CERR
Table A-1
3
Fully Integrated T1/E1 Framer and Line Interface
through
SERR
2
A-7
for a description of which
MERR
Bt8370/8375/8376
1
N8370DSE
FERR
0
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