- 您现在的位置：买卖IC网 > PDF目录30731 > LC72706E SPECIALTY CONSUMER CIRCUIT, PQFP44 PDF资料下载
参数资料
| 型号： | LC72706E |
| 元件分类： | 消费家电 |
| 英文描述： | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| 封装： | QFP-44 |
| 文件页数： | 13/15页 |
| 文件大小： | 164K |
| 代理商： | LC72706E |
e.g. to a value of 3 or more as opposed to the default of 2, if the block synchronization recognition output (the
BLOCK pin, pin 23) is used to recognize the presence or absence of FM multiplex data.
Frame Synchronization Error Protection Count
This IC detects the four unique BIC inflection points that exist in a single frame, and increments or decrements the
protection counter depending on whether or not the IC internal frame synchronization counter matches. The data values
are set in the same way as those for the block synchronization protection count are set, namely data in which 1 has been
subtracted from the desired protection count must be transferred. The frame synchronization default values are 8 for
forward protection and 2 for backward protection.
Control Registers
These registers are used to set the IC operating mode. These are described later.
Notes
— The address bits DI12 to DI15 are ignored.
— Addresses other than those listed above (for example location 0110) are special addresses used for test mode and
other special IC functions. Do not set these locations.
— The default values are the values reloaded into the internal registers when a reset signal (RST) is received. These
values are the recommended values for normal operation, and normally do not need to be modified. If only the
default values are used, there is no need to provide data transfer routines in the external CPU or microcontroller.
Layer 4 CRC Check Circuit
This is a function provided for data group error detection, i.e. layer 4 CRC. After the stipulated number of bytes of data
group data and a 16-bit CRC error check word are transferred, the CRC4 pin outputs a high level if there were no errors.
The CRC4 pin outputs a high level if all the bits in the IC internal CRC check register were 0. When using this function
to perform the layer 4 CRC check, the IC internal CRC check register must be initialized before a single data group data
unit is transferred. This register is initialized by sending bit 7 of the control register. Note that since this flag is not
automatically reset to 0, the application must return it to 0 before transferring layer 4 CRC check data. If there were no
errors in any of the received data groups, the CRC register will always be all zeros after the CRC check of a single data
group. Therefore, the above control register initialization will not be necessary as long as there are no errors in the layer 4
CRC. The data length of the transferred data group data is in unit of 8 bits. Also note that while there is no upper limit on
the amount of data transferred in a single operation, data transfers can also be divided into multiple transfer operations.
No. 5745-7/15
LC72706E
Received data
Synchronization
counter BIC position
Reset
*: Both forward and backward protection counts are 3.
Figure 1 Block Synchronization Protection Operation
(forward
→ backward → forward)
相关PDF资料 |
PDF描述 |
|---|---|
| LC72707E | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| LC72708E | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| LC72708E | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| LC72709E | SPECIALTY CONSUMER CIRCUIT, PQFP44 |
| LC72709W | SPECIALTY CONSUMER CIRCUIT, PQFP64 |
相关代理商/技术参数 |
参数描述 |
|---|---|
| LC72707 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:FM Multiplex Receiver IC Supporting All Worldwide Standards |
| LC72707E | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:FM Multiplex Receiver IC Supporting All Worldwide Standards |
| LC72708 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:FM Multiplex Broadcast Reception IC for Mobile VICS Systems |
| LC72708E | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:FM Multiplex Broadcast Reception IC for Mobile VICS Systems |
| LC72709 | 制造商:SANYO 制造商全称:Sanyo Semicon Device 功能描述:FM Multiplex Reception IC for Mobile Systems |
发布紧急采购，3分钟左右您将得到回复。