BT8376EPF datasheet(136/323 Pages) CONEXANT

136 / 323 page

3.0 Registers

Bt8370/8375/8376

3.4 Interrupt Status Registers

Fully Integrated T1/E1 Framer and Line Interface

3-18

Conexant

N8370DSE

006—Error Interrupt Status (ISR5)

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

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].

0 = no error

1 = TSLIP error

RSLIP

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].

0 = no error

1 = RSLIP error

CKERR

CLAD Phase Detector or JCLK Acceleration Error—Reports JCLK acceleration/deceleration

(enabled by JAUTO bit; addr 002).

JERR

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.

0 = no error

1 = uncontrolled JAT data slip

CERR

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.

0 = no error

1 = CRC error

SERR

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).

0 = no error

1 = CAS error

MERR

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.

0 = no error

1 = MFAS error

FERR

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 Table A-1 through A-7 for a description of which

frame bits are monitored according to the selected receive framer mode.

0 = no error

1 = frame error

TSLIP

RSLIP

CKERR

JERR

CERR

SERR

MERR

FERR

CKERR

JAUTO

JCLK Acceleration

CKERR disabled

No error

JCLK acceleration active

BT8376EPF Datasheet(PDF) 136 Page - Synaptics Incorporated.

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