Digital Voice Systems AMBE-3000 Spezifikationen Seite 60

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AMBE-3000F™ Vocoder Chip Users Manual
Version 3.4, April, 2014
I/
O Management
McBSP_CLKR
McBSP_FSR
McBSP_RXD
M1
M2 M3
M4
M
M7
M6
M9
M8
M1
M2 M3
M4
M5
McBSP_CLKX
M10
McBSP_FSX
McBSP_TXD
M10
Bit(6) Bit(4)Bit(5)Bit(7)
Bit(0)
Figure 33 Timing of McBSP when Selected as Packet Interface
No. Parameter MIN MAX
M1 Cycle time, for McBSP_CLKR and McBSP_CLKX 1.085 µs 69.44 µs
M2 Pulse duration, for McBSP_CLKR and McBSP_CLKX High
535.53 ns
34.72µs
M3 Pulse duration, for McBSP_CLKR and McBSP_CLKX Low
535.53 ns
34.72µs
M4 Rise Time, for McBSP_CLKR and McBSP_CLKX
7 ns
M5 Fall Time, for McBSP_CLKR and McBSP_CLKX
7 ns
M6 Set-up Time, for McBSP_FSR high before McBSP_CLKR low
2 ns
M7 Hold Time, for McBSP_FSR high after McBSP_CLKR low
6 ns
M8 Setup time McBSP_RXD valid before McBSP_CLKR low
2 ns
M9 Hold time McBSP_RXD valid after McBSP_CLKR low
6 ns
M10
Delay time McBSP_CLKX high to McBSP_FSX transission and
McBSP_TXD transission
3 ns 27 ns
Table 23 McBSP Packet Interface Timing
Rate
S_COM_RATE2
TQFP Pin 91
BGA Pin F10
S_COM_RATE1
TQFP Pin 90
BGA Pin E11
S_COM_RATE0
TQFP Pin 89
BGA Pin E13
28,800 Hz. 0 0 0
57,600 Hz. 0 0 1
115,200 Hz. 0 1 0
230,400 Hz. 0 1 1
(Subject to Change) Page 50
DVSI CONFIDENTIAL PROPRIETARY
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