BT8954 CONEXANT [Conexant Systems, Inc], BT8954 Datasheet - Page 79

• Manufacturer Part Number: BT8954
• Description: VOICE PAIR GAIN FRAMER
• Manufacturer: CONEXANT [Conexant Systems, Inc]

Bt8954
Voice Pair Gain Framer
TSFIFO_O_UNDER
TSFIFO_O_OVER
TSFIFO_I_UNDER
TSFIFO_I_OVER
TFIFO_UNDER
TFIFO_OVER
N8954DSC
0xE7—Transmit Status 1 (TSTATUS_1)
—
7
—
6
Transmit Signaling Output FIFO_UNDER Error—Indicates that the TSFIFO_O has
underflowed. That is, TSFIFO_O is being read into DSL frames faster than it is being updated
with TSFIFO_I. Also reported in ISR (as part of SIG_FIFO_ERR), this error generates a
SIG_FIFO_ERR interrupt (if SIG_FIFO_ERR in IMR is enabled).
Transmit Signaling Output FIFO_OVER Error indicates that TSFIFO_O has overflowed. That
is, the TSFIFO_O is being updated faster than it is being read and transmitted in DSL frames.
Also, reported in ISR (as part of SIG_FIFO_ERR), this error generates a SIG_FIFO_ERR
interrupt (if SIG_FIFO_ERR in IMR is enabled).
Transmit Signaling Input FIFO_UNDER Error—Indicates that the TSFIFO_I has
underflowed. That is, TSFIFO_I is being copied into TSFIFO_O faster than it is being updated
by the MC. Also reported in ISR (as part of SIG_FIFO_ERR), this error generates a
SIG_FIFO_ERR interrupt (if SIG_FIFO_ERR in IMR is enabled).
Transmit Signaling Input FIFO_OVER Error—Indicates that the TSFIFO_I has overflowed.
That is, the TSFIFO_I is being updated faster by the MC than it is being copied into
TSFIFO_O. Also reported in ISR (as part of SIG_FIFO_ERR), this error generates a
SIG_FIFO_ERR interrupt (if SIG_FIFO_ERR in IMR is enabled).
Transmit FIFO_UNDER Error—Indicates the TFIFO has underrun. Also reported in ISR, this
error generates a TX_ERR interrupt (if TX_ERR in IMR is enabled).
Transmit FIFO_OVER Error—Indicates the TFIFO has overflowed. Also reported in ISR, this
error generates a TX_ERR interrupt (if TX_ERR in IMR is enabled).
TSFIFO_O_ UNDER
5
0 = TSFIFO_O normal
1 = TSFIFO_O underflowed
0 = TSFIFO_O normal
1 = TSFIFO_O overflowed
0 = TSFIFO_I normal
1 = TSFIFO_I underflowed
0 = TSFIFO_I normal
1 = TSFIFO_I overflowed
0 = TFIFO normal
1 = TFIFO underrun
0 = TFIFO normal
1 = TFIFO overflowed
TSFIFO_O_ OVER
4
Conexant
TSFIFO_I_UNDER
3
TSFIFO_I_OVER
2
TFIFO_UNDER
4.11 Receive/Transmit Status
1
4.0 Registers
TFIFO_OVER
0
4-27