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AR# 50664 14.1 Zynq - PL power-off support (independent from PS) on the ZC702 board

Can I power-off the PL maintaining the PS functionality on the ZC702 board?

No, not on the ZC702 board rev. C.

The Zynq-7000 EPP split power domain scheme provides designers with the flexibility to save power by utilizing the programmable logic only when needed by their system. The PS can use the PMBUS to access the POWER controllers and power-off the PL power supplies (VCCINT, VCCBRAM, VCCAUX, VADJ and VCC2v5_PL). The problem is that on the ZC702, VCCAUX is connected to VCC1v8 that provides power to U65 thatoutputs thePS_CLK.

If VCCAUX is set to 0 (sending the appropriate command to U32 over the PMBUS) also VCC1v8 goes to 0, PS_CLK disappears and the PS loses functionality.

AR# 50664
Date Created 07/03/2012
Last Updated 07/03/2012
Status Active
Type General Article
Devices
  • Zynq-7000
Tools
  • EDK - 14.1
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