AudioCodes Ltd.
AC4830xC-C VoPP
40
Catalog Number: LTRT-00060
3.3.2 PCM Port Timing when External Codec Used
When the AC4830xC-C is connected to a Codec, then the following Figures and Tables
within the
whole of Section 3.3.2 must apply
. Otherwise, see Section 3.3.3
3.3.2.1 PCM Port Receive Timing (using Codec)
Table
3-8: PCM Port Receive Timing Requirements (using Codec)
Parameter (units ns)
Min
Max
(61) Cycle time, PCM port clock
488
3
488
3
(62) Fall time, PCM port clock*
8
(63) Rise time, PCM port clock*
8
(64) Pulse duration, PCM port clock low/ high*
59
-
(65) Setup time, PCMFS before PCMCLK falling edge**
1
(66) Hold time, PCMFS after PCMCLK falling edge**
3
#
PCM Clock - 1
(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 to F(PCMCLK) = 2.048 MHz only
** Timings for PCMCLK and PCMFS are given with polarity bits (CLKP and FSP) set to 0.
# This value is 6 ns less than the PCM clock cycle time in (61). Refer to the Designer’s Manual for the
PCM clock value.
Содержание AC4830 C-C Series
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