AN2549

Electrical characteristics

31/33

5.2.2

Hi-speed synchronous serial interface (SSC)

The maximum baudrate of the SSC in the ST10F272Z2 is 8 Mbaud whereas it is 10 Mbaud

in the ST10F269Zx. For CPU frequencies strictly higher than 32 MHz, the minimum value in

the SSCBR register (prescaler value) must not be lower than 2.

Address/Unlatched

CS hold after RD,

WR

-

-

Latched CS low to

valid data in

-

3 TCL - 19

-

3 TCL - 21

-

16.5 +

-

Address setup to

RdCS, WrCS (with

RW delay)

2 TCL -

-

2 TCL - 11

-

-

14 +

-

Table 21.

Demultiplexed bus timings (continued)

Symbol

Parameter

ST10F269Zx

ST10F272Z2

ST10F269Zx

ST10F272Z2

40 MHz

Min

Max

Min

Max

Min

Max

Min

Max