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STLC2415

7

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 tresholds) 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:

– ST specific HCI command (check STLC2415 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 following baud rates:

Table 10. List of Supported Baud Rates

7.2 Synchronous Serial Interface

The Synchronous Serial Interface (SSI) (or the Synchronous Peripheral Interface (SPI)) is a flexible mod-

ule supporting full-duplex and half-duplex synchronous communications with external devices in Master

and Slave mode. It allows the STLC2415 to communicate with peripheral devices.

The Synchronous Serial Interface is also capable of inter processor communications in a multiple-master

system. This interface is flexible enough to interface directly with numerous standard product peripherals.

This Synchronous Serial Interface peripheral features:

– full duplex, four-wire synchronous transfers.

– Microwire half duplex transfer using 8-bit control message

– programmable clock polarity and phase.

– transmit data pin tri state able when not transmitting

– Master or Slave operation

– Programmable clock bit rate up to XIN/4

– Programmable data frame from 4 bits to 16 bits.

– Independent transmit and receive 16 words FIFO.

– Internal loopback

7.3 I2C Interface

Used to access I2C peripherals.

The interface is a fast master I2C; it has full control of the interface at all times. I2C slave functionality is

not supported.

Baud rate

–

57.6 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