About the Module
Baud-rate generation up to 921 kbps for all UARTs
False start-bit detection
Separate DMA requests for transmit and receive data services
SSP Serial Ports
ConnectCore XP 270 supports two Synchronous Serial Protocol serial ports (SSP and
NSSP). The SSP ports are a synchronous serial interfaces that connect to a variety of
external analog-to- digital (A/D) converters, audio and telecommunication codecs,
and many other devices that use serial protocols for data transfer. The SSP ports
provide support for these protocols:
Texas Instruments (TI) Synchronous Serial Protocol
Motorola Serial Peripheral Interface (SPI) protocol
National Semiconductor Microwire
Programmable Serial Protocol (PSP)
The SSP ports operate as full-duplex devices for TI Synchronous Serial Protocol,
SPI and PSP protocols and as a half-duplex device for the Microwire protocol.
The FIFO can be loaded or emptied by the CPU using programmed I/O or by DMA burst
transfers.
Features
One transmit FIFO and one receive FIFO, each 16 samples deep by 32-bits
wide
Sample sizes from 4- to 32-bits
Bit-rates from 6.3 Kbps (minimum) to 13 Mbps (maximum)
Master-mode and slave-mode operation
Receive-without-transmit operation
Network mode with up to eight time slots and independent transmit/
receive in any/all/none of the time slots — available only with TI
Synchronous Serial Protocol and Programmable Serial Protocol (PSP) formats
Audio clock control to provide a 4x output clock and support for selection of
most standard audio Codec frequencies
www.digi.com
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