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STLC2410B

7

INTERFACES

7.1 UART Interface

The chip contains two enhanced (128-byte FIFO depth, sleep mode, 127 Rx and 128 Tx interrupt tresh-

olds) UARTs named UART1 and UART2 compatible with the standard M16550 UART.

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

UART2 features:

– standard HCI UART transport layer:

– ST specific HCI command (check STLC2410B Software Interface document for more information)

– RXD, TXD, CTS, RTS on permanent external pins

– 128-byte FIFOs, for transmit and for receive

– Default configuration: 57.6 kbits/s

– Specific HCI command to change to the following baud rates:

Table 9. List of supported baud rates

7.2 Synchronous Serial Interface

The Synchronous Serial Interface is a flexible module that supports full-duplex and half-duplex synchro-

nous communications with external devices in Master and Slave mode. It allows the STLC2410B to com-

municate 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

The I2C port is used both to connect to an external E2PROM and to access I2C peripherals like the

STw5094 Codec. The I2C implemented in the STLC2410B is a master I2C, it has the full control of the

I2C bus at all time. I2C slave functionality is not supported, so any other I2C attached to the I2C bus must

be slave, otherwise bus contention will occur.

Baud rate

–

57.6 k (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