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參數(shù)資料
| 型號： | MT8965 |
| 廠商： | Mitel Networks Corporation |
| 元件分類： | Codec |
| 英文描述： | Integrated PCM Filter Codec(集成PCM濾波器/編解碼器（用于數(shù)字遠(yuǎn)程通信）) |
| 中文描述： | 集成濾波器的PCM編解碼器（集成的PCM濾波器/編解碼器（用于數(shù)字遠(yuǎn)程通信）） |
| 文件頁數(shù)： | 9/24頁 |
| 文件大小： | 120K |
| 代理商： | MT8965 |
ISO
2
-CMOS
MT8960/61/62/63/64/65/66/67
6-27
Powerdown
Powerdown of the chip is achieved in several ways:
Internal Control:
1)
Initial Power-up. Initial application of V
DD
and
V
EE
causes powerdown for a period of 25 clock
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.
2)
Loss of C2i. Powerdown is entered 10 to 40
μ
s
after C2i has assumed a continuous logic high
(V
DD
). In this condition the chip will be in the
same state as in (1) above.
Note:
If C2i stops at a continuous logic low
(GNDD), the digital data and status is
indeterminate.
External Control:
1)
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
EE
or GNDD. Power is removed from
the filters and analog sections of the chip. The
analog ouput buffer at V
R
will be connected to
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.
2)
CSTi Input. With CA at V
EE
and CSTi held at
continuous logic high the chip assumes the
same state as described in External Control
(1) above.
Figure 7 - Typical Use of the Special Drive Outputs
From ST-BUS
From ST-BUS
Master Clock
to ST-BUS
5V
Alignment
Register Select
CSTi
DSTi
C2i
DSTo
V
DD
F1i
CA
SD3
SD2
GNDD
V
Ref
GNDA
V
R
ANUL
V
X
V
EE
SD0
SD1
2.5V
0.1
μ
F
-5V
MT8960/61/64/65
Gain
Section
2/4 Wire
Converter
Message
Waiting
(With Relay
Drive)
Ring Feed
(With Relay
Drive)
-100V DC
Telephone
Line
-48V DC
-48V DC
90V
RMS
Ring Trip
Filter
(With Relay
Drive)
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MT8965AC | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:ISO2-CMOS Integrated PCM Filter Codec |
| MT8965AE | 制造商:Microsemi Corporation 功能描述: |
| MT8965AE1 | 制造商:Microsemi Corporation 功能描述:PB FREE A-LAW FILTER CODEC 制造商:Microsemi Corporation 功能描述:PCM FLTR CODEC 18PDIP - Rail/Tube 制造商:MICROSEMI CONSUMER MEDICAL PRODUCT GROUP 功能描述:IC CODEC A-LAW CCITT PCM 18PDIP 制造商:Microsemi Corporation 功能描述:IC CODEC A-LAW CCITT PCM 18PDIP |
| MT8966 | 制造商:MITEL 制造商全稱:Mitel Networks Corporation 功能描述:Integrated PCM Filter Codec |
| MT8966AS | 制造商:MITEL 功能描述: |
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