W681310 Datasheet, PDF (17/36 Pages) Winbond – 3V SINGLE-CHANNEL VOICEBAND CODEC

T_FS
FST
T _{FSR H}
T _{F SFH}
T_FSRS
T_{BCK H}
T_BCKL
B C L K T -1 0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18
PCM T
T_BDTD
T_BDTD
T _{H ID}
D7 D6 D5 D4 D3 D2 D1 D0
T_BDTD
T
B
D
T_B
TD
C
K
T _{H ID}
D7 D6 D5 D4 D3 D2 D1 D0
PCM R
M SB
T_DRS
T_DRH
L SB
D7 D6 D5 D4 D3 D2 D1 D0
M SB
L SB
M SB
T_DRS
T_DRH
L SB
D7 D6 D5 D4 D3 D2 D1 D0
M SB
L SB
BCH =0
B 1 C hannel
BCH =1
B 2 C hannel
W681310
Figure 8.3 IDL PCM Timing
SYMBOL DESCRIPTION
MIN
1/T_FS
1/T_BCK
T_BCKH
T_BCKL
T_FSRH
FST Frequency
---
BCLKT Frequency
256
BCLKT HIGH Pulse Width
50
BCLKT LOW Pulse Width
50
BCLKT –1 Falling Edge to FST Rising Edge
20
Hold Time
T_FSRS
FST Rising Edge to BCLKT 0 Falling edge
60
Setup Time
T_FSFH
BCLKT 0 Falling Edge to FST Falling Edge
20
Hold Time
T_BDTD
BCLKT Rising Edge to Valid PCMT Delay
10
Time
T_HID
Delay Time from the BCLKT 8 Falling Edge
10
(B1 channel) or BCLKT 18 Falling Edge (B2
Channel) to PCMT Output High Impedance
T_DRS
Valid PCMR to BCLKT Falling Edge Setup
20
Time
T_DRH
PCMR Hold Time from BCLKT Falling Edge
75
Table 8.3 IDL PCM Timing Parameters
TYP
8
---
---
---
---
---
---
---
---
---
---
MAX
---
4800
---
---
---
UNIT
kHz
kHz
ns
ns
ns
--- ns
--- ns
60 ns
50 ns
--- ns
--- ns
- 17 -
Publication Release Date: September 2005
Revision B13