AC4830xC-C Data Book
Chapter 3. Chip Data and Timing
Revision 1.0
43
March 2000
3.3.3 PCM Port Timing with Clock from PCM Framer
When the AC4830xC-C is
not
connected to a Codec, but receives its clock from the
PCM Framer, then the following Figures and Tables within the
whole of Section 3.3.3
must apply. Otherwise, see Section 3.3.2
3.3.3.1 PCM Port Receive Timing (using PCM Framer)
Table
3-11: PCM Port Receive Timing (using PCM Framer)
Parameter (units ns)
Min
Max
(61) Cycle time, PCM port clock
122
3
(62) Fall time, PCM port clock*
8
(63) Rise time, PCM port clock*
8
(64) Pulse duration, PCM port clock low/ high*
37
(65) Setup time, PCMFS before PCMCLK falling edge**
1
(66) Hold time, PCMFS after PCMCLK falling edge**
3
(67) Setup time, PCMIN before PCMCLK falling edge
0
(68) Hold time, PCMIN after PCMCLK falling edge
4
* Values are ensured by design but not tested.
3
Applies up to 8.192 Mbps
** Timings for PCMCLK and PCMFS are given with polarity bits (CLKP and FSP) set to 0.
Figure
3-7: PCM Port Receive Timing (using PCM Framer)
67
66
PCMIN
65
P C M F S
P C M C L K
68
64
64
61
63
62
Содержание AC4830 C-C Series
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Страница 12: ...AudioCodes Ltd AC4830xC C VoPP 10 Catalog Number LTRT 00060 Reader s Notes...
Страница 58: ...AudioCodes Ltd AC4830xC C VoPP 56 Catalog Number LTRT 00060 Figure 4 2 Interface Application Driving a Codec...
Страница 60: ...AudioCodes Ltd AC4830xC C VoPP 58 Catalog Number LTRT 00060 Reader s Notes...