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ST72C254G2 Datasheet(PDF) 122 Page - STMicroelectronics

No. de pieza ST72C254G2
Descripción Electrónicos  8-BIT MCU WITH SINGLE VOLTAGE FLASH MEMORY, ADC, 16-BIT TIMERS, SPI, I2C INTERFACES
PDF  135 Pages
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Fabricante Electrónico  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

ST72C254G2 Datasheet(HTML) 122 Page - STMicroelectronics

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ST72104G, ST72215G, ST72216G, ST72254G
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COMMUNICATION INTERFACE CHARACTERISTICS (Cont’d)
Figure 91. SPI Slave Timing Diagram with CPHA=11)
Figure 92. SPI Master Timing Diagram 1)
Notes:
1. Measurement points are done at CMOS levels: 0.3xVDD and 0.7xVDD.
2. 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 of the I/O port configuration.
SS INPUT
CPHA=0
MOSI INPUT
MISO OUTPUT
CPHA=0
tw(SCKH)
tw(SCKL)
tr(SCK)
tf(SCK)
ta(SO)
tsu(SI)
th(SI)
MSB OUT
BIT6 OUT
LSB OUT
see
CPOL=0
CPOL=1
tsu(SS)
th(SS)
tdis(SO)
th(SO)
see
note 2
note 2
tc(SCK)
HZ
tv(SO)
MSB IN
LSB IN
BIT1 IN
SS INPUT
CPHA=0
MOSI OUTPUT
MISO INPUT
CPHA=0
CPHA=1
CPHA=1
tc(SCK)
tw(SCKH)
tw(SCKL)
th(MI)
tsu(MI)
tv(MO)
th(MO)
MSB IN
MSB OUT
BIT6 IN
BIT6 OUT
LSB OUT
LSB IN
see note 2
see note 2
CPOL=0
CPOL=1
CPOL=0
CPOL=1
tr(SCK)
tf(SCK)



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