4.0 Registers
RS8953B/8953SPB
4.13 Receive/Transmit Status
HDSL Channel Unit
0x07—Transmit Status (STATUS_3)
7
6
5
4
3
2
1
0
—
—
—
STUFF_ERR
TFIFO_SLIP
TFIFO_MPTY
TFIFO_FULL
TX_STUFF
TX_STUFF
Transmit STUFF Decision—Indicates whether the last transmitted HDSL frame was output
with 4 STUFF bits or none.
0 = No STUFF bits output
1 = 4 STUFF bits output
TFIFO_FULL
Transmit FIFO Full Error—Indicates the TFIFO has overflowed. This is also reported in
ERR_STATUS and IRR (if TX_ERR_EN in TCMC_1[addr0x06]) and generates a TX_ERR
interrupt (if TX_ERR in IMR is enabled). TFIFO_FULL errors may result from a change of
transmit PCM frame alignment when MPU writes to TFIFO_RST, or from any changes in
TCLK or BCLKn frequency or to the transmit routing table or the transmit payload map.
0 = TFIFO normal
1 = TFIFO overflowed
TFIFO_MPTY
TFIFO_SLIP
Transmit FIFO Empty Error—Indicates the TFIFO has Underrun. This is also reported in
ERR_STATUS and IRR (if TX_ERR_EN in TCMC_1[addr0x06]), and generates a TX_ERR
interrupt (if TX_ERR in IMR is enabled). TFIFO_MPTY errors may be triggered by events
similar to those which cause TFIFO_FULL errors.
0 = TFIFO normal
1 = TFIFO Underrun
Transmit FIFO Slip—Indicates that the number of PCM timeslots routed into the TFIFO is not
equal to the number of payload bytes mapped out of the TFIFO over a 6 ms period. This is also
reported in ERR_STATUS and IRR (if TX_ERR_EN in TCMC_1[addr0x06]), and generates a
TX_ERR interrupt (if TX_ERR in IMR is enabled). TFIFO_SLIP errors may be triggered by
events similar to those which cause TFIFO_FULL errors. Repeated TFIFO_SLIP errors may
indicate improper configuration of either the transmit payload map or the transmit routing
table.
0 = Transmit FIFO normal
1 = Transmit FIFO unbalanced
STUFF_ERR
Transmit Stuffing Error—Indicates when the phase difference measured from PCM to HDSL
6 ms frames exceeds the maximum bit Stuffing Threshold [STF_THRESH_C; addr 0xD3].
This is also reported in ERR_STATUS and IRR (if TX_ERR_EN) and generates a TX_ERR
interrupt (if TX_ERR in IMR is enabled). STUFF_ERR may be triggered by events similar to
those which cause TFIFO_FULL errors. The STUFF generator is automatically reset when
STUFF_ERR is detected.
0 = STUFF generator normal
1 = STUFF generator error
0x21—CRC Error Count (CRC_CNT)
7
6
5
4
3
2
1
0
CRC_CNT[7:0]
4-58
Conexant
N8953BDSB
CONEXANT [ CONEXANT SYSTEMS, INC ]
