ST10 datasheet(25/65 Pages) STMICROELECTRONICS

25 / 65 page

ST10C167

25/65

High Speed Synchronous Serial Channel (SSC)

The High-Speed Synchronous Serial Interface

SSC

provides

flexible

high-speed

serial

communication between the ST10C167 and other

microcontrollers,

microprocessors

external

peripherals.

The SSC supports full-duplex and half-duplex

synchronous communication; The serial clock

signal can be generated by the SSC itself (master

mode) or be received from an external master

(slave mode). Data width, shift direction, clock

polarity and phase are programmable. This allows

communication

with

SPI-compatible

devices.

Transmission

and

reception

data

double-buffered. A 16-bit Baud rate generator

provides the SSC with a separate serial clock

signal. The serial channel SSC has its own

dedicated 16-bit Baud rate generator with 16-bit

reload capability, allowing Baud rate generation

independent from the timers.

SSCBR is the dual-function Baud Rate Generator/

Reload register. Table 11 lists some possible

Baud rates against the required reload values and

the resulting bit times for a 25MHz CPU clock.

Table 11 : Synchronous Baud rate and reload values

Baud Rate

Bit Time

Reload Value

Reserved use a reload value > 0.

---

0000H

5M Baud

200ns

0001H

3.3M Baud

303ns

0002H

2.5M Baud

400ns

0004H

2M Baud

500ns

0005H

1M Baud

µs

000BH

100K Baud

µs

007CH

10K Baud

100

µs

04E1H

1K Baud

1ms

30D3H

190.7 Baud

5.2ms

FFF FH

XIII - SERIAL CHANNELS (continued)

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