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AN2549 Datenblatt(PDF) 31 Page - STMicroelectronics

Teilenummer AN2549
Bauteilbeschribung  Porting an application from the ST10F269Zx to the ST10F272Z2
PDF  33 Pages
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Hersteller  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

AN2549 Datenblatt(HTML) 31 Page - STMicroelectronics

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AN2549
Electrical characteristics
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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.
t28 CC
Address/Unlatched
CS hold after RD,
WR
0 (no tF)
-5 + tF
(tF > 0)
-0 + tF
-
0 (no tF)
-5 + tF
(tF > 0)
-0 + tF
-
t39SR
Latched CS low to
valid data in
-
3 TCL - 19
+ 2tA + tC
-
3 TCL - 21
+ 2tA + tC
18.5 + 2tA
+ tC
-
16.5 +
2tA +
tC
-
t82CC
Address setup to
RdCS, WrCS (with
RW delay)
2 TCL -
10.5 + 2tA
-
2 TCL - 11
+ 2tA
-
14.5 + 2tA
-
14 +
2tA
-
Table 21.
Demultiplexed bus timings (continued)
Symbol
Parameter
ST10F269Zx
ST10F272Z2
ST10F269Zx
@fCPU = 40 MHz
ST10F272Z2
@fCPU =
40 MHz
Min
Max
Min
Max
Min
Max
Min
Max



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