BT8954 CONEXANT [Conexant Systems, Inc], BT8954 Datasheet - Page 86

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

5.0 Electrical and Mechanical Specifications
5.1 Electrical Specifications
5.1.5 PCM Interface Timing
Table 5-6. PCM Interface Switching Characteristics
Figure 5-3. PCM Interface Timing
5-4
Symbol
PCMFn+1
PCMCLK
11
12
13
14
15
16
17
18
19
PCMFn
PCMR
PCMT
Frame
Frame
(Short
(Short
Sync)
Sync)
PCMCLK Frequency
PCMCLK Rise Time
PCMCLK Fall Time
Setup Time, PCMFn High before PCMCLK Falling Edge
Hold Time, PCMFn High after PCMCLK Falling Edge
Delay Time, PCMCLK High to PCMT Data Valid
Setup Time, PCMR Valid before PCMCLK Falling Edge
Hold Time, PCMR Valid after PCMCLK Falling Edge
If Gclk = 33 MHz—Hold Time, PCMR Valid after PCMCLK Falling Edge
If Gclk = 50 MHz—Hold Time, PCMR Valid after PCMCLK Falling Edge
Delay Time, PCMCLK Low to PCMT Data Disabled
14
12
15
PCM interface switching characteristics are displayed in
PCM interface timing is illustrated in
16
1
1
Parameter
2
2
Transmit and Receive Bytes for Codec n
Conexant
3
3
13
4
4
5
Figure
5
17
18
5-3.
6
6
Minimum
1.536
30.4
18.5
—
—
50
50
50
50
0
11
7
7
Table
Voice Pair Gain Framer
Maximum
8
8
5-6.
2.048
140
165
50
50
—
—
—
50
50
19
N8954DSC
1
1
18
Bt8954
Units
MHz
ns
ns
ns
ns
ns
ns
ns
ns
ns