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參數(shù)資料
| 型號： | 7322BMF-TR |
| 廠商： | CHRONTEL |
| 元件分類： | 消費家電 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PDSO16 |
| 封裝： | LEAD FREE, SSOP-16 |
| 文件頁數(shù)： | 1/10頁 |
| 文件大小： | 63K |
| 代理商： | 7322BMF-TR |
CH7322B
Advance Information
209-0000-095
Rev. 1.2,
6/29/2009
1
Chrontel
Chrontel CH7322B CEC
Features
General Description
Complies with Consumer Electronic Control (CEC)
version 1.3a
Less than 10mA in full operation conditions
Fully programmable through a two-wire serial port
Programmable power management
Auto Mode Technology Supports mandatory CEC
functions such as One Touch Play, Power Status etc.
without software programming
Capable of supporting full CEC features by accessing
internal registers.
Report CEC events through an interrupt and registers
Flexible crystal frequency input between 4 and 50
MHz or external CMOS clock ranging from 1 to
100Mhz
DDC master to obtain Physical Address
Serial Port voltage supported from 1.8V to 5V
Single 3.3V voltage supply
Adjustable interrupt voltage level from 1.8V to 3.3V
HBM up to 8KV ESD protection
Offered in a 16-pin, lead-free SSOP package
Applications
DVD Players
DVD Recorders
Digital Video Cameras
Personal Computers
A/V Receivers
Digital Set-top Boxes
Chrontel’s
CH7322B
is
a
low
cost,
low-power
semiconductor device designed for HDMI systems to
easily enable Consumer Electronic Control (CEC)
features, which allow consumers to manage all of their
HDMI CEC peripherals with just one remote control.
Through innovative design, the CH7322B can help our
customers
achieve
their
HDMI-CEC
system
requirement by drastically reducing complicated and
time-consuming microcontroller programming effort.
To
minimize
CEC
development
complexity,
the
CH7322B
incorporates
a
robust
and
powerful
mechanism for
handling CEC Message Opcode
Commands.
The
device’s
advanced
Auto
Mode
Technology simply provides HDMI-CEC playback
systems with the ability to accomplish three mandatory
CEC functions – One Touch Play, Suspend and Resume
without programming any of CH7322B registers.
For
example, when a HDMI-CEC DVD player is in standby
mode and if the CEC “Set Stream Path” Message
Opcode is received,
the CH7322B can generate an
interrupt signal to trigger the host controller for system
normal operation.
More sophisticated CEC features like Deck Control,
Tuner control, Volume adjustment and Recording
Functions for AV devices can also be accomplished
through programming CH7322B internal registers.
Once a CEC message is received, verified and
interpreted, the CH7322B will store the requested CEC
function into register buffers and send an interrupt
signal to notify the host controller.
The system
firmware can then take an action based on the content of
the register through the host controller serial port
access.
The CH7322B has a master DDC interface and when
the hot plug signal is high, the CH7322B will
automatically obtain its Physical Address from a HDMI
receiver’s EDID and save it in the designated register
for future usage.
The CH7322B accepts a wide range of input clock
frequencies that are generated from either a crystal or an
external clock source for CEC command timing. This
low-cost, power-saving and space-saving device is
available in a 16 pin lead-free SSOP package.
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