w681512 Winbond Electronics Corp America, w681512 Datasheet - Page 18

• Manufacturer Part Number: w681512
• Description: Single-channel Voiceband Codec
• Manufacturer: Winbond Electronics Corp America

SYMBOL
1/T
1/T
T
T
T
T
T
T
T
T
T
T
BCKH
BCKL
FSRH
FSRS
FSFH
FDTD
BDTD
HID
DRS
DRH
FST
BCK
BCLKT
PCMT
PCMR
FST
DESCRIPTION
FST Frequency
BCLKT Frequency
BCLKT HIGH Pulse Width
BCLKT LOW Pulse Width
BCLKT 0 Falling Edge to FST Rising Edge Hold Time
FST Rising Edge to BCLKT 1 Falling edge Setup Time
BCLKT 1 Falling Edge to FST Falling Edge Hold Time
FST Rising Edge to Valid PCMT Delay Time
BCLKT Rising Edge to Valid PCMT Delay Time
Delay Time from the BCLKT 16 Falling Edge (B1
channel) or BCLKT 32 Falling Edge (B2 Channel) to
PCMT Output High Impedance
Valid PCMR to BCLKT Rising Edge Setup Time
PCMR Hold Time from BCLKT Rising Edge
T
FSRH
0
1
MSB
MSB
T
D7 D6 D5 D4 D3 D2 D1 D0
D7 D6 D5 D4 D3 D2 D1 D0 D7 D6 D5 D4 D3 D2
T
T
FSRS
2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34
FDTD
FSFH
T
DRS
B1 Channel
BCH = 0
T
Table 8.4 GCI PCM Timing Parameters
DRH
T
BDTD
Figure 8.4 GCI PCM Timing
T
HID
LSB
LSB
- 18 -
MSB
MSB
T
D7 D6 D5 D4 D3 D2
BDTD
T
FS
T
DRS
B2 Channel
BCH = 1
T
DRH
T
BDTD
T
BCKH
MIN
T
512
BCK
50
50
20
60
20
10
20
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D1 D0
D1 D0
T
BCKL
LSB
LSB
T
TYP
HID
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---
---
---
---
---
---
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8
W681512
MAX
6176
60
60
50
60
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UNIT
kHz
kHz
ns
ns
ns
ns
ns
ns
ns
ns
ns
ns