AMBE2000 ETC, AMBE2000 Datasheet - Page 13

• Manufacturer Part Number: AMBE2000
• Description: VOCODER CHIP
• Manufacturer: ETC

3.3
To reset the AMBE-2000 chip, the reset signal must be held low for a minimum of six clock cycles. The recovery time from
reset is approximately 95 msec. In other words, 95 msec after the rising edge of the reset signal the AMBE-2000 starts
processing PCM samples. The first packet will be ready after 252 PCM samples are read.
X2/CLKIN
CLKOUT
H = 7.629 ns
Clock and Reset Timing
CLKOUT is shown for reference only. It is not to be connected in the circuit.
t
f
t
(CO)/t
d
Reference
T
T
(CIH-CO)
t
t
t
w
t
w
w
t
t
w
Figure 3-A X2/CLKIN and CLKOUT Timing Diagram
c
f
r
(COH)
c
(CIH)
(COL)
(CIL)
(CO)
Table 3-A X2/CLKIN and CLKOUT Timing Parameters
(CL)
(CL)
(CI)
t
p
r
(CO)
Cycle time,
X2/CLKIN
Fall time, X2/CLKIN
Rise time, X2/CLKIN
Pulse duration, X2/CLKIN low
Pulse duration, X2/CLKIN high
Transitory phase, PLL lock-up time
Cycle time, CLKOUT (typical is
Delay time, X2/CLKIN high/low to CLKOUT high/low
Fall/Rise time, CLKOUT (typical is 2 ns)
Pulse duration, CLKOUT low
Pulse duration, CLKOUT high
tp
Confidential Proprietary, Subject to Change
Unstable
t
c
(CI)
User’s Manual Version 3.0
t
d
(CIH-CO)
Visit us at
Integer PLL multiplier N (N=4)
t
Parameter
c
(CO)
t
t
c
w
(CI)/4
page 13
(CIH)
www.dvsinc.com
t
w
(CIL)
t
w
(COH)
t
r
(CI)
t
w
(COL)
H-4
H-4
Min
20
15
6
6
4
t
f
(CO)
t
f
(CI)
Max
400
50
16
H
H
4
4
t
r
(CO)
Units
ns
ns
ns
ns
ns
ns
ns
ns
ns
s