Controlling The Communications Mode And Handshaking - Intel 8XC196K Series User Manual

Table of Contents

8XC196K x , J x , CA USER'S MANUAL

The synchronous serial port baud (SSIO_BAUD) register enables and disables the baud-rate

generator and selects the SSIO baud rate. During read operations, SSIO_BAUD serves as the down-

counter monitor. The down-counter is decremented once every four state times when the baud-rate

generator is enabled.

Figure 8-5. Synchronous Serial Port Baud (SSIO_BAUD) Register

Controlling the Communications Mode and Handshaking

The SSIOx_CON register (Figure 8-6) controls the communications mode and handshaking. The

two least-significant bits indicate whether an underflow or overflow has occurred and whether

the channel is ready to transmit or receive.

Baud-rate Generator Enable

This bit enables and disables the baud-rate generator.

For write operations:

0 = disable the baud-rate generator and clear BV6:0

1 = enable the baud-rate generator and start the down-counter

For read operations:

0 = baud-rate generator is disabled

1 = baud-rate generator is enabled and down-counter is running

For write operations:

These bits represent BAUD_VALUE, an unsigned integer that

determines the baud rate. The maximum value of BAUD_VALUE is 7FH;

the minimum value is 0. Use the following equation to determine

BAUD_VALUE for a given baud rate.

------------------------------------- - 1

For read operations:

These bits contain the current value of the down-counter.

Reset State: