ECSPI - MISO MOSI

neusch — Fri, 22 Nov 2013 12:56:55 GMT

Hello,

i woud like to connect two i.MX6 with SPI. (SCLK, MISO, MOSI, SS)

Reference Manual

[...]

21.4.2 Slave Mode

In this configuration, Chip Select (SS) becomes an input signal, and is used to control

data transfers through the Shift register, as well as to load/store the data FIFO.

[...]

-> Chip Select connected directly

But what i have to do with MISO/MOSI? Is crossing required?

[...]

ECSPI4_MISO (MISO) Master data in; slave data out EIM_D22
ECSPI4_MOSI (MOSI) Master data out; slave data in EIM_D28

[...]

i.MX6 Master - i.MX6 Slave

EIM_D22 (TX) - EIM_D28 (RX)

EIM_D28 (RX) - EIM_D22 (TX)

or is no crossing required?

i.MX6 Master - i.MX6 Slave

EIM_D22 (TX) - EIM_D22 (RX)

EIM_D28 (RX) - EIM_D28 (TX)

Thanks for any Help

Re: ECSPI - MISO MOSI

Yuri — Mon, 25 Nov 2013 07:36:31 GMT

SPI assumes the following connection :

Master MISO (MI) is connected to Slave MISO (SO)

Master MOSI (MO) is connected to Slave MOSI (SI)

So,

i.MX6 Master - i.MX6 Slave

EIM_D22 (TX) - EIM_D22 (RX)

EIM_D28 (RX) - EIM_D28 (TX)