Digital Voice Systems AMBE-2000 - Clock and Reset Timing

AMBE-2000™ Vocoder Chip Users Manual
Version 4.92, June, 08
DVSI Confidential Proprietary, Subject to Change Page 16
Visit us at www.dvsinc.com
3.3 Clock and Reset Timing
To reset the AMBE-2000 chip, the reset signal must be held low for a minimum of 50 µs. The recovery time from reset is
approximately 95 ms. In other words, 95 ms 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.
Figure 3-A X2/CLKIN and CLKOUT Timing Diagram
~ ~
~ ~
~ ~
Unstable
~ ~
~ ~
tp
t
c
(CI)
t
c
(CO)
t
d
(CIH-CO)
t
w
(CIH)
t
w
(CIL)
t
w
(COH)
t
w
(COL)
t
r
(CI)
t
f
(CI)
t
r
(CO)
t
f
(CO)
X2/CLKIN
CLKOUT