bt8970 Mindspeed Technologies, bt8970 Datasheet - Page 33

• Manufacturer Part Number: bt8970
• Description: Single-chip Hdsl Transceiver
• Manufacturer: Mindspeed Technologies

Bt8970
Single-Chip HDSL Transceiver
must be frequency-locked to QCLK, though the use of two internal FIFOs allow an arbitrary phase relationship
to QCLK. TQ[1] and TQ[0] are sampled on the active edge of TBCLK, as programmed through the MCI. RQ[1]
and RQ[0] are output on the active edge of RBCLK, also as programmed through the MCI. The clock
relationships for the case where TBCLK is programmed to be falling-edge active and RBCLK is rising-edge
active are illustrated in
Figure 2-8. Parallel Slave Mode
100101B
Parallel slave mode uses RBCLK and TBCLK inputs to synchronize data transfer. RBCLK and TBCLK
RBCLK
TBCLK
RQ[1]
RQ[0]
TQ[1]
TQ[0]
Figure
Preliminary Information/Conexant Proprietary and Confidential
2-8.
Magnitude
Magnitude
Sign
Sign
0
0
0
0
Conexant
Magnitude
Magnitude
Sign
Sign
1
1
1
1
Magnitude
Magnitude
Sign
Sign
2
2
2.0 Functional Description
2
2
2.4 Channel Unit Interface
100101_012
2-15