数据搜索系统,热门电子元器件搜索
  Chinese▼

Delete All
ON OFF
ALLDATASHEETCN.COM

X  

预览 PDF Download HTML

OCM-22 Datasheet(数据表) 3 Page - Agere Systems

部件型号  OCM-22
说明  One-Chip Modem for Embedded Applications
下载  4 Pages
Scroll/Zoom Zoom In 100% Zoom Out
制造商  AGERE [Agere Systems]
网页  http://www.agere.com
标志 AGERE - Agere Systems

OCM-22 Datasheet(HTML) 3 Page - Agere Systems

  OCM-22 数据表 HTML 1Page - Agere Systems OCM-22 数据表 HTML 2Page - Agere Systems OCM-22 数据表 HTML 3Page - Agere Systems OCM-22 数据表 HTML 4Page - Agere Systems  
Zoom Inzoom in Zoom Outzoom out
 3 page
background image
Agere Systems Inc.
3
Product Brief Rev 1.0
April 2005
One-Chip Modem for Embedded Applications
OCM-22
Functional Description (continued)
Figure 3. Parallel Interface to DIA Port
5-8104 (F) a
OCM-22 DEVICE
HD[7:0]
HA[1:0]
HRDN
HWRN
HINTR
HCSN
DATA[7:0]
ADDR[1:0]
READN
WRITEN
INTRPT
ADDRESS
DECODE
Internal PLL for Low-Speed Crystal Support
OCM-22 supports low-speed, external crystals by
incorporating a PLL to support lower-cost crystals and
to ease the effort of minimizing EMI. If future code
needs higher clock rates, an internal multiplier can pro-
vide this without recertification or redesign of the exter-
nal hardware. OCM-22 requires an external 29.4912
MHz crystal or oscillator.
PWM Speaker Interface
The speaker driver employs a pulse-width modulated
algorithm, where 8-bit two's complement data is modu-
lated by a triangle wave. The following diagram shows
the recommended speaker configuration. This inex-
pensive configuration drives a low-impedance speaker
while obtaining a suitable volume. The SPKR signal is
fed to a transistor through a low-pass filter to remove
the carrier signal (cut-off frequency = 4 kHz).
Power Requirements
Both the OCM-22 device and the CSP1034C are
manufactured in low-power CMOS technology and are
designed to operate using only a single 3.3 V supply.
During operation, OCM-22's on-chip PLL can be set to
provide only the minimum internal clock rate required.
The CSP1035A is also manufactured in low-power
CMOS technology. However, the CSP1035A is fully
line powered. A shunt regulator maintains a monitored
2.7 V supply, during off-hook conditions. If the voltage
falls below 2.2 V, the chip saves its registers and goes
into reset. This allows the CSP1035A to retain the reg-
ister settings during a call bridge where the tip/ring volt-
age can collapse to 0 V for up to 400 ms and start up
again at the completion of the call break.
Figure 4. Lower-Impedance Speaker Configuration
5-8105 (F)
SPKR
3.3 k
10 k
6800 pF
+3.3 V
AT-08
FDV301N




HTML 页

1  2  3  4 


数据表 下载

Go To PDF Page


链接网址


Privacy Policy
ALLDATASHEETCN.COM
ALLDATASHEET是否为您带来帮助?  [ DONATE ]  

关于 Alldatasheet    |   广告服务   |   联系我们   |   隐私政策   |   书签   |   链接交换   |   制造商名单
All Rights Reserved© Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  , 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