ultrascale学习笔记之启动时序分析

基于MPSOC上电启动电源分析

Technical Reference Manual

（内部版本）

1.版本说明

2.概要

主要针对MPSOC硬件进行分析设计。

• 参考黑金ZU3CG开发板
• 参考 ds925-zynq-ultrascale-plus:DC and AC Switching Characteristics.pdf
• 参考 ug1075-Zynq UltraScale+ Device Packaging and Pinouts Product Specification.pdf

3.分析

整个启动顺序分为PS和PL，两部分完全独立；
PS分为两步：
第一：The low-power domain (LPD)
第二：The full-power domain (FPD)
PS与PL完全独立，并行。

3.1.PS-LPD启动顺序

>  To achieve minimum current draw and ensure that the I/Os are 3-stated at power-on, the recommended power
>  on sequence for the low-power domain (LPD) is listed. The recommended power-off sequence is the reverse of>  the power-on sequence.>  1. VCC_PSINTLP>  2. VCC_PSAUX, VCC_PSADC, and VCC_PSPLL in any order or simultaneously.>  3. VCCO_PSIO

• 以 4CG为例：

3.2.PS-FPD启动顺序

>  To achieve minimum current draw and ensure that the I/Os are 3-stated at power-on, the recommended power
>  on sequence for the full-power domain (FPD) is listed. The recommended power-off sequence is the reverse of>  the power-on sequence.>  1. VCC_PSINTFP and VCC_PSINTFP_DDR driven from the same supply source.>  2. VPS_MGTRAVCC and VCC_PSDDR_PLL in any order or simultaneously.>  3. VPS_MGTRAVTT and VCCO_PSDDR in any order or simultaneously.

• 以 4CG为例：

3.3.PL启动顺序

>  The recommended power-on sequence is VCCINT, VCCINT_IO/VCCBRAM/VCCINT_VCU, VCCAUX/VCCAUX_IO, and VCCO>  to achieve minimum current draw and ensure that the I/Os are 3-stated at power-on. The recommended power
>  off sequence is the reverse of the power-on sequence. If VCCINT and VCCINT_IO/VCCBRAM have the same>  recommended voltage levels, they can be powered by the same supply and ramped simultaneously. VCCINT_IO>  must be connected to VCCBRAM. If VCCAUX/VCCAUX_IO and VCCO have the same recommended voltage levels,>  they can be powered by the same supply and ramped simultaneously. VCCAUX and VCCAUX_IO must be connected>  together. VCCADC and VREF can be powered at any time and have no power-up sequencing requirements.>  The recommended power-on sequence to achieve minimum current draw for the GTH or GTY transceivers is>  VCCINT, VMGTAVCC, VMGTAVTT OR VMGTAVCC, VCCINT, VMGTAVTT. There is no recommended sequencing for>  VMGTVCCAUX. Both VMGTAVCC and VCCINT can be ramped simultaneously. The recommended power-off sequence>  is the reverse of the power-on sequence to achieve minimum current draw. If these recommended sequences>  are not met, current drawn from VMGTAVTT can be higher than specifications during power-up and power-down.

• 总结上述文档：

• PL-逻辑

• VCCINT 和 VCCINT_IO 和 VCCBRAM 由同一组电源供电（0.85v）

• VCCAUX 和 VCCAUX_IO 由同一组电源供电（1.8v）* VCCADC 和 VREF没有上电顺序要求；

• PL-MGT

• VCCINT（0.85v） 和 MGTAVCC（0.9v）

• MGTAVTT（1.2v）

• MGTVCCAUX（1.8v）没有启动要求

• 以 4CG为例：

3.疑问

• ·· VCCO 的启动顺序 ？ ··
  答案：最后启动

4.预定功能IO

PS_POR_B : LPD启动完成后拉高
PS_PROG_B ：LPD启动完成后拉高
PS_SRST_B : LPD启动完成后拉高

S_SRST_B : LPD启动完成后拉高