Texas Instruments SM320F2812-HT 用户手册
9
4
SPISOMI
SPISIMO
SPICLK
(clock polarity = 1)
SPICLK
(clock polarity = 0)
Master In Data
Must Be Valid
Master Out Data Is Valid
8
5
3
2
1
SPISTE
(see Note A)
SGUS062A – JUNE 2009 – REVISED APRIL 2010
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NOTE
Internal clock prescalers must be adjusted such that the SPI clock speed is not greater than
the I/O buffer speed limit (20 MHz).
the I/O buffer speed limit (20 MHz).
A.
In the master mode, SPISTE goes active 0.5tc(SPC) before valid SPI clock edge. On the trailing end of the word, the
SPISTE will go inactive 0.5tc(SPC) after the receiving edge (SPICLK) of the last data bit.
SPISTE will go inactive 0.5tc(SPC) after the receiving edge (SPICLK) of the last data bit.
Figure 6-24. SPI Master Mode External Timing (Clock Phase = 0)
110
Electrical Specifications
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