ch7322b Chrontel, ch7322b Datasheet

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ch7322b

Manufacturer Part Number
ch7322b
Description
Chrontel Ch7322b Cec
Manufacturer
Chrontel
Datasheet
Chrontel
209-0000-095
Features
• Complies with Consumer Electronic Control (CEC)
• Less than 10mA in full operation conditions
• Fully programmable through a two-wire serial port
• Programmable power management
• Auto Mode Technology † Supports mandatory CEC
• Capable of supporting full CEC features by accessing
• Report CEC events through an interrupt and registers
• Flexible crystal frequency input between 4 and 50
• 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
version 1.3a
functions such as One Touch Play, Power Status etc.
without software programming
internal registers.
MHz or external CMOS clock ranging from 1 to
100Mhz
DVD Players
DVD Recorders
Digital Video Cameras
Personal Computers
A/V Receivers
Digital Set-top Boxes
Rev. 1.2,
Chrontel CH7322B CEC
6/29/2009
General Description
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
requirement by drastically reducing complicated and
time-consuming microcontroller programming effort.
To minimize CEC development complexity, the
CH7322B
mechanism for
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.
example, when a HDMI-CEC DVD player is in standby
mode and if the CEC “Set Stream Path” Message
Opcode is received,
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.
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.
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.
The CH7322B accepts a wide range of input clock
incorporates
achieve
handling CEC Message Opcode
the CH7322B can generate an
their
a
robust
Advance Information
HDMI-CEC
CH7322B
and
The system
powerful
system
For
1

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ch7322b Summary of contents

Page 1

... 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 ...

Page 2

... CHRONTEL SC SD SPP SC_DDC SD_DDC AS RESET* MISC HPDO/ INTO HPDI OE 2 CEC Rx Automatic Mode Control CEC Tx Clock Tree Figure 1: Functional Block Diagram 209-0000-095 CH7322B CEC XI / FIN XO Rev. 1.2, 6/29/2009 ...

Page 3

... CHRONTEL 1.0 Pin-Out 1.1 Package Diagram FIN HPDO/INTO 209-0000-095 Rev. 1.2, 6/29/2009 Chrontel CH7322B Figure 2: 16-Pin SSOP package CH7322B VDD RESET* ISET CEC SC_DDC SD_DDC HPDI GND 3 ...

Page 4

... FIN. Crystal range MHz. However external CMOS clock is attached FIN, XO should be left open. Output Enable (internal pull-up) When this pin is low, it will put CH7322B into standby mode. Hot Plug Detect Output / Interrupt Output This pin serves as an interrupt for device connection status. However this output pin can be programmed for other usage ...

Page 5

... CEC output low voltage OL,CEC V CEC input high voltage IH,CEC threshold 209-0000-095 Rev. 1.2, 6/29/2009 Min -0.5 GND – 0.5 Indefinite -65 Min 3.0 0 Min Test Condition Min Note 1,2,3 2.5 Note 1,2,3 CH7322B Typ Max Units 5 V VDD + 0.5 V Sec °C 150 °C 150 °C TBD Typ Max Units 3.3 3.6 V °C 85 ...

Page 6

... Note 1: CEC pin connected to 3.3V via 27Kohm resistor. VDD=3.3V. Note 2: CEC pin connected to 3.3V via 3Kohm resistor. VDD=3.3V. Note 3: CEC pin connected to ground via 150Kohm resistor. VDD=3.3V. 6 Test Condition Min 0.8 1.62 0.2 I =3.0mA OL 1.1 1.25 0.9 0.8*VDD 0.25*VDD 1.2 0.9 1.25 0.9 209-0000-095 CH7322B Typ Max Unit 1.0 V 0.5 V 5.5 V 1.25 V 1.0 V 0.25 V 0.2 0 ohm 5 ...

Page 7

... Note 2: CEC pin connected to 3.3V via 3Kohm resistor and external 7200pF capacitor to ground. VDD=3.3V. Note 3: CEC pin connected to external 150pF capacitor to ground. VDD=3.3V. 209-0000-095 Rev. 1.2, 6/29/2009 Test Condition Min Typ Note 1,2,3 Note 1,2 CH7322B Max Unit 50 250 MHz 100 ...

Page 8

... CHRONTEL 3.0 Package Dimensions Table of Dimensions No. of Leads MIN 5.80 3.80 Milli- meters MAX 6.20 4. ο Figure 3: 16-Pin SSOP Package SYMBOL 0.20 4.80 1.35 0.10 0.635 0.30 5.00 1.75 0.25 209-0000-095 CH7322B I J φ φ 0.25 0.18 0.40 0° 0.50 0.25 1.27 8° Rev. 1.2, 6/29/2009 ...

Page 9

... CHRONTEL 4.0 Revision History Table 2: Revision History Rev. # Date Section 1.0 2/18/09 All 1.1 2/20/08 1.2 6/29/2009 Features 209-0000-095 Rev. 1.2, 6/29/2009 Description Official release. Add Ordering Information Add 8KV ESD protection spec. CH7322B 9 ...

Page 10

... Chrontel, Inc. All Rights Reserved. Printed in the U.S.A. 10 Disclaimer ORDERING INFORMATION Number of Package Type Pins Lead Free SSOP 16 Lead Free SSOP 16 in Tape & Reel Chrontel San Jose, CA 95131-1326 Tel: (408) 383-9328 Fax: (408) 383-9338 www.chrontel.com E-mail: sales@chrontel.com 209-0000-095 CH7322B Voltage Supply 3.3V 3.3V Rev. 1.2, 6/29/2009 ...

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