Differences

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--- spi [ 04.02.2025 21:48] – [API] lars
+++ spi [ 05.02.2025 01:31] (current) – lars
@@ Line 2: / Line 2: @@
 Different variants exist. Usually SPI refers to the Motorola Serial Peripheral Interface. Other variants are the Texas Instruments Serial protocol (SSP) and the National Instruments Microwire.
+===== Protocol =====
+Most significant bit first
@@ Line 23: / Line 27: @@
   - data bits are read when clock goes to idle level.
-^ mode ^ CPOL ^ CPHA ^ write bit ^ read bit ^
+^ mode ^ CPOL ^ CPHA ^ write bit                               ^ read bit        ^
-| 0 | 0 | 0 | falling clock, and when /CS activates | rising clock  |
+| 0    | 0    | 0    | clock goes low, and when /CS activates  | clock goes high |
-| 1 | 0 | 1 | rising clock                          | falling clock |
+| 1    | 0    | 1    | clock goes high                         | clock goes low  |
-| 2 | 1 | 0 | rising clock, and when /CS activates  | falling clock |
+| 2    | 1    | 0    | clock goes high, and when /CS activates | clock goes low  |
-| 3 | 1 | 1 | falling clock                         | rising clock  |
+| 3    | 1    | 1    | clock goes low                          | clock goes high |