UM11029
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User manual
Rev. 1.0 — 16 June 2017
324 of 515
NXP Semiconductors
UM11029
Chapter 18: LPC84x SPI0/1
18.7.2.2 Frame_delay
The Frame_delay value controls the amount of time at the end of each frame. This delay
is inserted when the EOF bit = 1. Frame_delay is illustrated by the examples in
.
Note that frame boundaries occur only where specified. This is because frame lengths
can be any size, involving multiple data writes. See
Fig 31. Frame_delay
Frame delay : CPHA = 0, Frame _delay = 2, Pre_delay = 0, Post_delay = 0
Mode 2 (CPOL = 1) SCK
Frame_delay
Mode 0 (CPOL = 0) SCK
MSB
LSB
MSB
LSB
MISO
MOSI
SSEL
MSB
MSB
Second data frame
LSB
LSB
Frame delay : CPHA = 1, Frame _delay = 2, Pre_delay = 0, Post_delay = 0
MSB
LSB
MSB
LSB
MISO
MOSI
SSEL
Mode 1 (CPOL = 0) SCK
Mode 3 (CPOL = 1) SCK
Frame_delay
MSB
MSB
Second data frame
First data frame
First data frame
LSB
LSB