bt8970 Mindspeed Technologies, bt8970 Datasheet - Page 77

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

Bt8970
Single-Chip HDSL Transceiver
Table 5-6. Symbol Clock (QCLK) Switching Characteristics
Figure 5-2. Clock Control Timing
100101B
(1)
Symbol
K = 16, 32, or 64 according to hclk_freq[1,0]. QCLK can be frequency locked to the incoming data symbol rate.
10
11
12
13
9
QCLK Period (T
QCLK Pulse-Width High
QCLK Pulse-Width Low
QCLK Hold after HCLK Rising Edge
QCLK Delay after HCLK High
QCLK
HCLK
Preliminary Information/Conexant Proprietary and Confidential
QCLK
7
12
)
(1)
13
Parameter
4,5,6
8
10
Conexant
9
T
T
QCLK
QCLK
Minimum
5.0 Electrical & Mechanical Specifications
K x T
11
–20
—
HCLK
2 – 20
2 – 20
T
T
QCLK
QCLK
Maximum
K x T
—
20
HCLK
2 + 20
2 + 20
5.4 Clock Timing
Units
—
—
—
ns
ns
100101_014
5-5