ST72F324K2TCR View Datasheet(PDF) - STMicroelectronics
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Description
Manufacturer
ST72F324K2TCR
STMicroelectronics
ST72F324K2TCR Datasheet PDF : 194 Pages
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ST72324xx-Auto
Electrical characteristics
12.12 Communication interface characteristics
12.12.1 Serial peripheral interface (SPI)
The following characteristics are subject to general operating conditions for VDD, fCPU, and
TA unless otherwise specified. The data is based on design simulation and/or
characterization results, not tested in production.
When no communication is on-going the data output line of the SPI (MOSI in master mode,
MISO in slave mode) has its alternate function capability released. In this case, the pin
status depends on the I/O port configuration. Refer to the I/O port characteristics for more
details on the input/output alternate function characteristics (SS, SCK, MOSI, MISO).
Table 109. SPI characteristics
t(s) Symbol
Parameter
Conditions
Min
Max
c fSCK
du 1/tc(SCK)
SPI clock frequency
Master fCPU = 8 MHz
Slave fCPU = 8 MHz
fCPU/128 = 0.0625
0
fCPU/4 = 2
fCPU/2 = 4
ro tr(SCK)
P tf(SCK)
SPI clock rise and fall time
te tsu(SS)(1) SS setup time(2)
Slave
le th(SS)(1) SS hold time
Slave
so tw(SCKH)(1)
b tw(SCKL)(1)
SCK high and low time
Master
Slave
O tsu(MI)(1)
- tsu(SI)(1)
Data input setup time
Master
Slave
t(s) th(MI)(1)
th(SI)(1)
Data input hold time
Master
Slave
uc ta(SO)(1) Data output access time
rod tdis(SO)(1) Data output disable time
Slave
P tv(SO)(1)
te th(SO)(1)
Data output valid time
Data output hold time
Slave (after enable edge)
le tv(MO)(1) Data output valid time
so th(MO)(1) Data output hold time
Master (after enable edge)
see I/O port pin description
tCPU + 50
120
100
90
100
100
100
100
0
120
240
120
0
120
0
Ob1. Data based on design simulation and/or characterization results, not tested in production.
Unit
MHz
ns
2. Depends on fCPU. For example, if fCPU = 8 MHz, then tCPU = 1 / fCPU = 125ns and tsu(SS) = 175ns.
Doc ID 13841 Rev 1
169/193
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