MT8966AS Zarlink Semiconductor, Inc., MT8966AS Datasheet - Page 9
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MT8966AS
Manufacturer Part Number
MT8966AS
Description
CODEC, MuLaw CODEC, Single Channel Integrated PCM Filter CODEC, 20SOIC
Manufacturer
Zarlink Semiconductor, Inc.
Datasheet
1.MT8966AS.pdf
(24 pages)
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Part Number:
MT8966AS
Manufacturer:
MITEL
Quantity:
20 000
Powerdown
Powerdown of the chip is achieved in several ways:
Internal Control:
1)
2)
Register Select
From ST-BUS
From ST-BUS
Master Clock
to ST-BUS
Alignment
Note: If C2i stops at a continuous logic low
(GNDD), the digital data and status is
indeterminate.
V
cycles and during this period the chip will
accept input only from C2i. The B-register is
reset to zero forcing SD0-5 to be inactive. Bits
0-5 of Register A (gain adjust bits) are forced
to zero and bits 6 and 7 of Register A become
logic high thus reinforcing the powerdown.
after C2i has assumed a continuous logic high
(V
same state as in (1) above.
Initial Power-up. Initial application of V
Loss of C2i. Powerdown is entered 10 to 40 µs
EE
DD
causes powerdown for a period of 25 clock
). In this condition the chip will be in the
5V
MT8960/61/64/65
CSTi
DSTi
C2i
DSTo
V
F1i
CA
SD3
SD2
DD
GNDD
GNDA
ANUL
V
SD0
SD1
V
Ref
V
V
EE
R
X
Figure 7 - Typical Use of the Special Drive Outputs
2.5V
-5V
ISO
0.1µF
2
-CMOS
DD
(With Relay
Ring Trip
and
Drive)
Filter
MT8960/61/62/63/64/65/66/67
External Control:
1)
2)
Register A. Powerdown is controlled by bits 6
and 7 ( when both at logic high) of Register A
which in turn receives its control word input
via CSTi, when F1i is low and CA input is
either at V
the filters and analog sections of the chip. The
analog ouput buffer at V
GNDA. DSTo becomes high impedance and
the clocks to the majority of the logic are
stopped. SD outputs are unaffected and may
be updated as normal.
CSTi Input. With CA at V
continuous logic high the chip assumes the
same state as described in External Control
(1) above.
Section
Gain
EE
Converter
2/4 Wire
or GNDD. Power is removed from
(With Relay
(With Relay
Ring Feed
Message
Waiting
R
Drive)
Drive)
will be connected to
EE
and CSTi held at
Telephone
-100V DC
-48V DC
90V
-48V DC
Line
RMS
6-27