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| 型号： | TDA9989ET |
| 厂商： | NXP SEMICONDUCTORS |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PBGA64 |
| 封装： | 4.50 X 4.50 MM, 0.80 MM HEIGHT, PLASTIC, SOT-962-3, TFBGA-64 |
| 文件页数： | 19/48页 |
| 文件大小： | 226K |
| 代理商： | TDA9989ET |
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TDA9989_2
NXP B.V. 2009. All rights reserved.
Product data sheet
Rev. 02 — 11 June 2009
26 of 48
NXP Semiconductors
TDA9989
HDMI 1.3a transmitter with CEC support
7.11.2 Clock
CEC clock must be running in Sleep mode (with CEC) to wake up the TDA9989 using
CEC specic message as described in
“HDMI 1.3a specication”.
CEC module can be clocked using:
External clocks:
– 12 MHz crystal.
– 12 MHz to 50 MHz clock available on PCB
Internal clock:
– FRO (Free Running Oscillator). FRO frequency varies per device basic
(temperature, process, voltage) and is ranges from 12.64 MHz to 12.9 MHz.
CEC operates normally (i.e. matches the timing requested CEC specication) if and only if
its clock frequency is 12 MHz.
So, for clock frequency higher than 12 MHz a calibration is needed. A calibration module
located between the clock source and the CEC module is used to divide the incoming
clock to cope the right frequency range see Figure 16.
Calibration procedure is completely handled by the software delivered together with the
device, it has the following steps:
Host processor set the TDA9989 in calibration mode
Host processor generates a negative pulse of 10 ms
± 1 % on INT_HDMI pin
Host processor deselects the calibration mode when it is completed, the chip is ready
to operate.
CEC clock calibration must be performed at each power-up and each time the TDA9989
moves from Standby or Sleep (without CEC) state to normal operating mode.
(1) Crystal or other system clock source
Fig 16. Modules involved in CEC clock calibration process
001aai453
DIVIDER
CEC clock calibration module
HOST PROCESSOR
INT_HDMI
I2C
OSC_IN(1)
OSC_OUT
CEC
MODULE
CEC CLK
12 MHz
TDA9989
FRO
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相关代理商/技术参数 |
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| TDA9989ET/C1,518 | 功能描述:视频 IC IC HDMI TX 1.3A 150MHZ RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TDA9989ET/C1,551 | 功能描述:视频 IC IC HDMI TX 1.3A 150MHZ RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TDA9989ET/C1,557 | 功能描述:视频 IC IC HDMI TX 1.3A 150MHZ RoHS:否 制造商:Fairchild Semiconductor 工作电源电压:5 V 电源电流:80 mA 最大工作温度:+ 85 C 封装 / 箱体:TSSOP-28 封装:Reel |
| TDA9995HL/C1,518 | 功能描述:视频开关 IC HDMI SW 3:1 EQUALIZER RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
| TDA9995HL/C1,551 | 功能描述:视频开关 IC HDMI SW 3:1 EQUALIZER RoHS:否 制造商:Texas Instruments 开关数量:4 开启电阻（最大值）:12 Ohms 传播延迟时间: 开启时间（最大值）: 关闭时间（最大值）: 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:WQFN-42 封装:Reel |
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