BT8376EPF datasheet(139/323 Pages) CONEXANT

139 / 323 page

Bt8370/8375/8376

3.0 Registers

Fully Integrated T1/E1 Framer and Line Interface

3.4 Interrupt Status Registers

N8370DSE

Conexant

3-21

00A—Data Link 2 Interrupt Status (ISR1)

All events in ISR1 are from rising edge sources. Each event is latched active-high and held until the processor

read clears ISR1. Each event triggers an interrupt if the corresponding IER1 bit is enabled [addr 012].

For Bt8370 and Bt8375

For Bt8376

RBOP

BOP Codeword Received—Set when a valid Bit Oriented Codeword is received and available

in the RBOP register [addr 0A2].

RFULL2

Receive FIFO Full—In HDLC modes, RFULL is set when the data link receiver attempts to

write received data to a full FIFO causing the receive data link FIFO to overrun. In

unformatted modes (Pack6 and Pack8), RFULL is set when the receive FIFO is filled to the

MSG_FILL limit selected in register RDL2_FFC [addr 0B2].

RNEAR2

Receive FIFO Near Full—Set when the receive FIFO fill level reaches the near full threshold

selected in register RDL2_FFC [addr 0B2].

RMSG2

Message Received—Set when a complete message or a partial message is received and

available in the receiver FIFO.

TDLERR2

Transmit FIFO Error—Set when the FIFO underruns as a result of the internal logic emptying

the FIFO without encountering an end of message [TDL2_EOM; addr 0B7]. The underrun

condition also forces transmission of an HDLC abort code.

TEMPTY2

Transmit FIFO Empty—Set when the FIFO overflows as a result of the processor attempting to

write to a full FIFO. Overflow data is ignored by the transmit FIFO.

TNEAR2

Transmit FIFO Near Empty—Set when the transmit FIFO level falls below the threshold

selected in register TDL2_FEC [addr 0B6].

TMSG2

Message Transmitted—Set when a complete message has been transmitted and the closing flag

is just beginning transmission.

RBOP

RFULL2

RNEAR2

RMSG2

TDLERR2

TEMPTY2

TNEAR2

TMSG2

RBOP

———————

BT8376EPF Datasheet(PDF) 139 Page - Synaptics Incorporated.

BT8376EPF Datasheet(HTML) 139 Page - Synaptics Incorporated.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL