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LMK04828: using it with a microcontroller
Part Number: LMK04828
I need some clarifications of the LMK04828 3-wire SPI interface. I have been trying to look for the standard for this 3-wire SPI. There are many SPI documents in the internet, but most of them are for the 4-wire SPI (SCK, CS, MISO, MOSI). There are some for 3-wire SPI (SCK, MISO, and MOSI) , but they are not the same SPI used in the LMK04828. My questions are:
1. What 3-wire SPI standard this LMK04828 is based on?
2. For a READ on the SPI, is there a requirement for the master to do something on the SCK (such as stretching or delaying the SCK ) at the last bit of address transfer, so there is enough time for the LMK04828 SDIO pin turns around from input to outputting the 8-bit data? And what is SCK delay or turn around timing requirement?
The 3 wire SPI implementation is a half duplex variant of 4 -wire SPI. I believe it is migration from previous microwire interface.
There are no requirements for clock stretching. Timing is provided in table 7.6
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In reply to Liam Keese:
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