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  3. AR# 47579: Zynq-7000 SoC, SPI - Master mode setup timing and the SPI reference clock period

AR# 47579

Zynq-7000 SoC, SPI - Master mode setup timing and the SPI reference clock period

Description

The setup timing for MI is dependent on the SPI reference clock period when operating the SPI interface in master mode. It is always equal to one reference clock period.

Solution

Impact:
Trivial. Satisfying the new setup requirements guarantees not to have issues.
Work-around: As long as the reference clock values are known before designing the board and timing is met with respect to a setup equal to the period of the slowest possible reference clock, there is not going to be any issues.
Configurations Affected: Systems that use the SPI controller in master mode.
Device Revision(s) Affected:Refer to (Xilinx Answer 47916) - Zynq-7000 SoC Silicon Revision Differences


Note:

The SPI_REF_CLK clock frequency must be greater than the CPU_1x clock frequency.

For GES devices, the SPI_REF_CLK clock frequency must be less than or equal 125 MHz.
For Production devices, the SPI_REF_CLK clock frequency must be less than or equal 200 MHz.

Ensure that your final design meets these constraints.

Linked Answer Records

Master Answer Records

Answer Number Answer Title Version Found Version Resolved
47916 Zynq-7000 SoC Devices - Silicon Revision Differences N/A N/A
AR# 47579
Date 06/13/2018
Status Active
Type Design Advisory
Devices