STV0684 View Datasheet(PDF) - STMicroelectronics
Part Name
Description
MFG CO.
'STV0684' PDF : 49 Pages View PDF
Functional Description
STV0684
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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