ST10 datasheet(24/58 Pages) STMICROELECTRONICS

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ST10F163

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SSP: The Synchronous Serial Port provides

high-speed serial communication with external

slave devices such as EEPROM. The SSP trans-

mits 1...3 bytes or receives 1 byte after sending

1...3 bytes synchronously to a shift clock which is

generated by the SSP.

The SSP can start shifting with the LSB or with the

MSB and is used to select shifting and latching

clock edges as well as the clock polarity. Up to two

chip select lines may be activated in order to direct

data transfers to one or both of two peripheral

devices.

Table 11 : Synchronous baud rate and SSPCKS reload values

SSPCKS Value

Synchronou s baud rate

000

SSP clock = CPU clock divided by 2

12.5 MBit/s

001

SSP clock = CPU clock divided by 4

6.25 MBit/s

010

SSP clock = CPU clock divided by 8

3.13 MBit/s

011

SSP clock = CPU clock divided by 16

1.56 MBit/s

100

SSP clock = CPU clock divided by 32

781 KBit/s

101

SSP clock = CPU clock divided by 64

391 KBit/s

110

SSP clock = CPU clock divided by 128

195 KBit/s

111

SSP clock = CPU clock divided by 256

97.7 KBit/s

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