STN8815A09 Datasheet, PDF (15/22 Pages) STMicroelectronics – Mobile multimedia application processor

Architecture overview
STn8815A09
2.16
Direct memory access (DMA) controllers
Direct memory accesses can be employed for data transfers involving DMA peripherals. A
DMA controller services FIFO fill/empty requests from these peripherals immediately
without CPU interaction. Peripheral-to-peripheral and memory-to-memory DMAs are also
supported. A multichannel DMA controller is provided for efficient and concurrent data
transfers.
2.17
Universal asynchronous receivers-transmitters (UARTs)
The STn8815A09 provides three autobaud UARTs, one of which offers all modem
control/status signals. They are enhanced versions of the industry-standard 16C550 UART
with a high data rate up to 6 Mbit/s and an embedded hardware Xon/Xoff handshake.
2.18
Synchronous serial port (SSP)
The STn8815A09 provides one SSP for synchronous serial communication with external
peripherals. SPI, MicroWire and TI protocols are supported, with programmable word length
of up to 32 bits and data rate up to 24 Mbit/s.
The SSP has the following features in both master and slave configurations:
● Parallel-to-serial conversion of data written to an internal, 32-bit wide, 32-location deep,
transmit FIFO.
● Serial-to-parallel conversion of received data, which is buffered in a 32-bit wide, 32-
location deep, receive FIFO.
● Programmable data frame size from 4 to 32 bits.
● Programmable clock bit rate and prescaler.
● Programmable clock phase and polarity in SPI mode.
● Support for direct memory accesses.
● Support for serial LCD smart panels.
2.19
Camera interfaces
● 3 camera interfaces that can be selected alternately:
– 2 serial SMIA CCP2 camera interfaces (mutually exclusive): up to 650 Mbit/s data
strobe,
– Parallel camera CCIR-656 interface up to 80-MHz with embedded/external sync.
● Direct support of 8-bit and 10-bit raw Bayer RGB data formats.
● High resolution up to 5 Mpixels for camera sensors (raw Bayer data).
● Unlimited resolution for camera modules with JPEG compression.
2.20
TV interface
The STn8815A09 interfaces seamlessly with the STw8009 companion-chip, which performs
signal conversion and connects directly to a TV set.
The TV interface is compatible with video and S-video.
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