參數(shù)資料
型號： STV0684
廠商： 意法半導體
英文描述： Digital Camera Processor
中文描述： 數(shù)碼相機處理器
文件頁數(shù)： 22/49頁
文件大?。?/td> 487K
代理商： STV0684
Functional Description
STV0684
22/49
3.10
Other interfaces
3.10.1 SPI
The SPI interface is a generic serial interface that can be used to perform the following functions:
●
Support for Multi-media and Secure Digital Cards
●
Support for serial flash where code can be located
The SPI supports:
●
Full duplex, three-wire synchronous transfers
●
Single, master/slave operation selectable either through firmware or hardware
●
Programmable clock polarity and phase
●
End of transfer interrupt flag
●
Write collision flag
●
Busy flag indication
3.10.2 I2C
The STV0684 features a hardware I2C master interface and supports the following features:
●
I2C protocol
●
Standard I2C mode (100 Khz)/Fast I2C mode (400 Khz)
●
Single master mode
●
Transmitter/Receiver performance
●
7/10 bit addressing
●
DMA mode data transfer
●
Clock stretching
3.10.3 Comparator for low battery detection
The comparator circuit was designed to compare the battery voltage (after an external resistor
divider) with an external reference voltage and generate a low_batt (high when battery voltage is
lower than the present threshold) signal for the CPU core.
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