STA2416 datasheet(28/38 Pages) STMICROELECTRONICS

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Interfaces

STA2416

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Interfaces

7.1

UART interface

The chip contains two enhanced (128 byte transmit FIFO and 128 byte receive FIFO, sleep

mode, 127 Rx and 128 Tx interrupt thresholds) UARTs named UART1 and UART2

compatible with the standard M16550 UART.

For UART1, only Rx and Tx signals are available (used for debug purposes).

UART2 features:

●

standard HCI UART transport layer:

–

all HCI commands as described in the Bluetooth™ specification 1.1

–

ST specific HCI command (check STA2416 Software Interface document for more

information)

●

RXD, TXD, CTS, RTS on permanent external pins

●

128-byte FIFOs, for transmit and for receive

●

default configuration: 57.600 kbps

●

specific HCI command to change to the baud rates given in Table 11

7.2

Synchronous serial interface

The synchronous serial interface (SSI) (or the synchronous peripheral interface (SPI)) is a

flexible module supporting full-duplex and half-duplex synchronous communications with

external devices in Master and Slave mode. It enables a microcontroller unit to

communicate with peripheral devices or allows inter-processor communications in a

multiple-master environment. This Interface is compatible with the Motorola SPI standard,

with the Texas Instruments Synchronous Serial frame format and with National

Semiconductor Microwire standard.

Special extensions are implemented to support the Agilent SPI interface for optical mouse

applications and the 32-bit data SPI for stereo codec applications.

Table 11.

List of supported baud rates

Baud rate

–

57.600 kbps (default)

4800

921.6k

38.4 k

2400

460.8 k

28.8 k

1800

230.4 k

19.2 k

1200

153.6 k

14.4 k

900

115.2 k

9600

600

76.8 k

7200

300

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