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參數(shù)資料
| 型號： | tda 6612-2 |
| 廠商： | SIEMENS AG |
| 英文描述： | TV-Stereo-Sound(TV 立體聲) |
| 中文描述： | 電視，立體音響（電視立體聲） |
| 文件頁數(shù)： | 4/47頁 |
| 文件大小： | 1967K |
| 代理商： | TDA 6612-2 |
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Semiconductor Group
4
TDA 6612-2
center frequency of the filter is switched between "dual" and "stereo" by a multiplexer. The
multiplexing frequency is adjustable by software. If a side band is detected, the multiplexer stops.
The interferences on the first "detected" criterion are suppressed by a digital integrator with a
following comparator and can be read out via
I
2
C Bus (talk mode) as the "stereo" or "dual" mode.
The control of the corresponding signal can be either directly internally or through the
μ
C. All the
necessary clock signal are derived from a fast setting PLL which is synchronized by a reference
frequency. This reference frequency must be sufficiently close to the horizontal frequency, but a
rigid phase coupling is not required
. Therefore, alternatively the use of a crystal controlled 62.5-
kHz frequency commonly found in PLL-tuning systems is possible. A further alternative for the clock
signal generation is a build-in crystal oscillator with an external 4-MHz crystal or the use an external
1- or 4-MHz clock frequency.
Control Section
All functions are controlled via an
I
2
C Bus interface with "listen" / "talk" functions. The data bytes
currently used are stored in a block of latches.
The telegram structure is formed in the following manner:
start condition - chip address - any number of bytes - stop condition
The following conditions apply to the data bytes:
Before the actual data byte (with the adjustment information),
always
an
I
2
C Bus sub-address byte
has to be transmitted. The
I
2
C Bus interface however is interpreting this sub-address byte as a data
byte.
Example: The headphone volume is to be increased in a number of steps.
Within a telegram (i.e. without a new start condition) any different sub-addresses can be accessed.
The changeover between "listen" and "talk" access to the IC however must always occur using the
following sequence: stop condition - start condition - chip address. Before each read access always
a start condition and chip address (talk) must be transmitted. The data to be read out are then
loaded into the
I
2
C Bus interface and can be transferred to the
μ
C.
Right
Wrong
Start condition
Chip address 84 (Hex)
Sub-addr. vol. HP 03 (Hex)
Vol. step 8 08 (Hex)
Sub-addr. vol. HP 03 (Hex)
Vol. step 9 09 (Hex)
Sub-addr. vol. HP 03 (Hex)
Vol. step 10 0A (Hex)
Stop condition
Start condition
Chip address 84 (Hex)
Sub-addr. vol. HP 03 (Hex)
Vol. step 8 08 (Hex)
Vol. step 9 09 (Hex)
Vol. step 10 0A (Hex)
Stop condition
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| TDA6612-5 | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:TV-STEREO-SOUND |
| TDA6612-5X | 制造商:INFINEON 制造商全稱:Infineon Technologies AG 功能描述:TV-STEREO-SOUND |
| TDA6650 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog) |
| TDA6650ATT | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog) |
| TDA6650ATT/C3 | 制造商:PHILIPS 制造商全稱:NXP Semiconductors 功能描述:5 V mixer/oscillator and low noise PLL synthesizer for hybrid terrestrial tuner (digital and analog) |
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