công cụ tìm kiếm bảng dữ liệu linh kiện điện tử
  Vietnamese  ▼
ALLDATASHEET.VN

X  

CD22354A bảng dữ liệu(PDF) 8 Page - Harris Corporation

tên linh kiện CD22354A
Giải thích chi tiết về linh kiện  CMOS Single-Chip, Full-Feature PCM CODEC
Download  10 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
nhà sản xuất  HARRIS [Harris Corporation]
Trang chủ  http://www.harris.com
Logo HARRIS - Harris Corporation

CD22354A bảng dữ liệu(HTML) 8 Page - Harris Corporation

Back Button CD22354A Datasheet HTML 2Page - Harris Corporation CD22354A Datasheet HTML 3Page - Harris Corporation CD22354A Datasheet HTML 4Page - Harris Corporation CD22354A Datasheet HTML 5Page - Harris Corporation CD22354A Datasheet HTML 6Page - Harris Corporation CD22354A Datasheet HTML 7Page - Harris Corporation CD22354A Datasheet HTML 8Page - Harris Corporation CD22354A Datasheet HTML 9Page - Harris Corporation CD22354A Datasheet HTML 10Page - Harris Corporation  
Zoom Inzoom in Zoom Outzoom out
 8 / 10 page
background image
4-172
CD22354A, CD22357A
Functional Description
Power Supply Sequencing
Do not apply input signal or load on output before powering
up VCC supply. Care must be taken to ensure that DX pin
goes on common back plane (with other DX pins from other
chips). DX pin cannot drive >50mA before Power-Up. This
will cause the part to latch up.
Power-Up
When power is first applied, the Power-On reset circuitry ini-
tializes the CODEC and places it in a Power-Down mode.
When the CODEC returns to an active state from the Power-
Down mode, the receive output is muted briefly to minimize
turn-on “click”.
To power up the device, there are two methods available.
1. A logical zero at MCLKR/PDN will power up the device,
provided FSX or FSR pulses are present.
2. Alternatively, a clock (MCLKR) must be applied to MCLKR/
PDN and FSX or FSR pulses must be present.
Power-Down
Two power-down modes are available.
1. A logical 1 at MCLKR/PDN, after approximately 0.5ms, will
power down the device.
2. Alternatively, hold both FSX and FSR continuously low,
the device will power down approximately 0.5ms after the
last FSX or FSR pulse.
Synchronous Operation
(Transmit and Receive Sections use the Same Master
Clock)
The same master clock and bit-clock should be used for the
receive and transmit sections. MCLKX (pin 9) is used to pro-
vide the master clock for the transmit section; the receive
section will use the same master clock if the MCLKR/PDN
(pin 8) is grounded (synchronous operation), or at V+
(power-down mode). MCLKR/PDN may be clocked only if a
clock is provided at BCLKR/CLKSEL (pin 7) as in asynchro-
nous operation.
The BCLKX (pin 10) is used to provide the bit clock to the
transmit section. In synchronous operation, this bit clock is
also used for the receive section if MCLKR/PDN (pin 8) is
grounded. BCLKR/CLKSEL (pin 7) is then used to select the
proper internal frequency division for 1.544MHz, 1.536MHz
or 2.048MHz operation (see Table below). For 1.544MHz
operation, the device automatically compensates for the
193rd clock pulse each frame.
Each FSX pulse begins the encoding cycle and the PCM
data from the previous encode cycle is shifted out of the
enabled DX output on the leading edge of BCLKX. After 8 bit-
clock periods, the tristate DX output is returned to a high
impedance state. With an FSR pulse, PCM data is latched
via the DR input on the negative edge of the BCLKX.FSX
and FSR must be synchronous with MCLKX.
Asynchronous Operation
(Transmit and Receive Sections use Separate Master
Clocks)
For the CD22357A, the MCLKX and MCLKR must be
2.048MHz and for the CD22354A must be 1.536MHz or
1.544MHz. These clocks need not be synchronous. However,
for best transmission performance, it is recommended that
MCLKX and MCLKR be synchronous.
For 1.544MHz operation the device automatically compensates
for the 193rd clock pulse each frame. FSX starts the encoding
operation and must be synchronous with MCLKX and BCLKX.
FSR starts the decoding operation and must be synchronous
with BCLKR. BCLKR must be clocked in asynchronous opera-
tion. BCLKX and BCLKR may be between 64kHz - 2.04MHz.
Short-Frame Sync Mode
When the power is first applied, the power initialization circuitry
places the CODEC in a short-frame sync mode. In this mode
both frame sync pulses must be 1 bit-clock period long, with the
timing relationship shown in Figure 1.
With FSX high during the falling edge of the BCLKX, the next
rising edge of BCLKX enables the DX tristate output buffer,
which will output the sign bit. The following rising seven edges
clock out the remaining seven bits upon which the next falling
edge will disable the DX output.
With FSR high during the falling edge of the BCLKR (BCLKX in
synchronous mode), the next falling edge of BCLKR latches in
the sign bit. The following seven edges latch in the seven
remaining bits.
Long-Frame Sync Mode
In this mode of operation, both of the frame sync pulses must
be three or more bit-clock periods long with the timing relation-
ship shown in Figure 2.
Based on the transmit frame sync FSX, the CODEC will sense
whether short or long-frame sync pulses are being used.
For 64kHz operation the frame sync pulse must be kept low for
a minimum of 160ns.
The DX tristate output buffer is enabled with the rising edge of FSX
or the rising edge of the BCLKX, whichever comes later and the
first bit clocked out is the sign bit. The following seven rising edges
of the BCLKX clock out the remaining seven bits. The DX output is
disabled by the next falling edge of the BCLKX following the 8th
rising edge or by FSX going low whichever comes later.
CLOCKING OPTIONS
MODE
BCLKR/CLKSEL
(PIN 7)
MASTER CLOCK
FREQUENCY SELECTED
CD22354A (
µ) CD22357A (A)
Asynchronous
or
Synchronous
Clocked
1.536MHz or
1.544MHz
2.048MHz
Synchronous
0
2.048MHz
1.536MHz or
1.544MHz
Synchronous 1(or open circuit)
1.536MHz or
1.544MHz
2.048MHz


Số phần tương tự - CD22354A

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
Intersil Corporation
CD22301 INTERSIL-CD22301 Datasheet
58Kb / 6P
   Monolithic PCM Repeater
January 1997
CD22301 INTERSIL-CD22301 Datasheet
176Kb / 5P
   Monolithic PCM Repeater
CD22301E INTERSIL-CD22301E Datasheet
58Kb / 6P
   Monolithic PCM Repeater
January 1997
CD22301E INTERSIL-CD22301E Datasheet
176Kb / 5P
   Monolithic PCM Repeater
CD22301 INTERSIL-CD22301_02 Datasheet
176Kb / 5P
   Monolithic PCM Repeater
More results

Mô tả tương tự - CD22354A

nhà sản xuấttên linh kiệnbảng dữ liệuGiải thích chi tiết về linh kiện
logo
STMicroelectronics
M5913 STMICROELECTRONICS-M5913 Datasheet
220Kb / 17P
   COMBINED SINGLE CHIP PCM CODEC AND FILTER
logo
NEC
UPD9625L NEC-UPD9625L Datasheet
87Kb / 2P
   CMOS PCM CODEC-Filter Combination
logo
Texas Instruments
TCM29C13J TI1-TCM29C13J Datasheet
366Kb / 25P
[Old version datasheet]   COMBINED SINGLE-CHIP PCM CODEC AND FILTER
TCM29C13A TI-TCM29C13A Datasheet
392Kb / 25P
[Old version datasheet]   COMBINED SINGLE-CHIP PCM CODEC AND FILTER
TCM29C13 TI-TCM29C13 Datasheet
389Kb / 25P
[Old version datasheet]   COMBINED SINGLE-CHIP PCM CODEC AND FILTER
logo
Intel Corporation
2913 INTEL-2913 Datasheet
1Mb / 21P
   COMBINED SINGLE-CHIP PCM CODEC AND FILTER
logo
Motorola, Inc
MC14406 MOTOROLA-MC14406 Datasheet
418Kb / 10P
   FULL DUPLEX 8-BIT COMPANDED PCM CODEC
logo
Texas Instruments
TLV320AIC1109 TI-TLV320AIC1109 Datasheet
353Kb / 27P
[Old version datasheet]   PCM CODEC
logo
Mitel Networks Corporat...
MT8960 MITEL-MT8960 Datasheet
324Kb / 22P
   ISO2-CMOS Integrated PCM Filter Codec
logo
Texas Instruments
TLV320AIC1106PWR TI-TLV320AIC1106PWR Datasheet
538Kb / 19P
[Old version datasheet]   PCM CODEC
More results


Html Pages

1 2 3 4 5 6 7 8 9 10


bảng dữ liệu tải về

Go To PDF Page


Link URL




Chính sách bảo mật
ALLDATASHEET.VN
Cho đến nay ALLDATASHEET có giúp ích cho doanh nghiệp của bạn hay không?  [ DONATE ] 

Alldatasheet là   |   Quảng cáo   |   Liên lạc với chúng tôi   |   Chính sách bảo mật   |   Trao đổi link   |   Tìm kiếm theo nhà sản xuất
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com