134
MC95FG308 / MC95FG208
ABOV Semiconductor Co., Ltd.
Figure 11.46
SPI Clock Formats when UCPHA=0
When UCPHA=0, the slave begins to drive its MISO output with the first data bit value when SS goes to active low.
The first XCK edge causes both the master and the slave to sample the data bit value on their MISO and MOSI inputs,
respectively. At the second XCK edge, the USART shifts the second data bit value out to the MOSI and MISO outputs
of the master and slave, respectively. Unlike the case of UCPHA=1, when UCPHA=0, the slave’s SS input must go to
its inactive high level between transfers. This is because the slave can prepare the first data bit when it detects falling
edge of SS input.
Figure 11.47
SPI Clock Formats when UCPHA=1
XCK
(UCPOL=1)
MISO
MOSI
XCK
(UCPOL=0)
/SS OUT
(MASTER)
BIT7
BIT0
/SS IN
(SLAVE)
BIT6
BIT1
…
…
BIT2
BIT5
BIT0
BIT7
BIT1
BIT6
SAMPLE
MSB First
LSB First
XCK
(UCPOL=1)
MISO
MOSI
XCK
(UCPOL=0)
/SS OUT
(MASTER)
BIT7
BIT0
/SS IN
(SLAVE)
BIT6
BIT1
…
…
BIT2
BIT5
BIT0
BIT7
BIT1
BIT6
SAMPLE
MSB First
LSB First
Содержание MC95FG208 Series
Страница 14: ...14 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd 4 Package Diagram Figure 4 1 32 Pin SOP Package...
Страница 15: ...15 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 2 32 Pin QFN Package...
Страница 16: ...16 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 3 32 Pin LQFP Package...
Страница 17: ...17 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 4 28 Pin SOP Package...
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Страница 19: ...19 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 6 28 Pin SOP Package...
Страница 20: ...20 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 7 28 Pin TSSOP Package...
Страница 21: ...21 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 8 20 Pin SOP Package...
Страница 22: ...22 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 9 20 Pin TSSOP Package...
Страница 23: ...23 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 10 16 Pin SOP Package...
Страница 24: ...24 MC95FG308 MC95FG208 ABOV Semiconductor Co Ltd Figure 4 11 16 Pin TSSOP Package...