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HDK-EV722F00-1V0 / 20230418 / Ziliang_yan 

1. Initial Version

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HDK-EV722F00-1V1 / 20230516 / Ziliang_yan 

1、SCH (1V1)
	1) Change flash (U13) default NC, and DO NOT place WSON package even if flash is needed
	2) Change C59 default NC (must be NC)，C59 can be removed in new design
2、BOM (1V1)
	1) update BOM as SCH changing

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HDK-EV722F00-1V2 / 20230621 / Ziliang_yan 

1、SCH (1V2)
	1) Modify XTAL note ,‘CL=12pF’-->‘CL=9pF’
	2) Modify U13 default part number 
2、BOM (1V2)
	1) Update XTAL U6 part number
	2) Add new BOM file for Main IC MCM psram

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HDK-EV722F00-2V0 / 20230626 / Ziliang_yan 

1、SCH (2V0)
	1) Update main IC pin assigment for IC  version-B
	2) Add a GND test point J28
	3) Remove C59
	4) Update RF part circuit
2、PCB (2V0)
	1) Update PCB layout according to SCH change
	2) Update DMIC footprint
3、BOM (2V0)
	1) Add R334 according to SCH change

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HDK-EV722F00-2V1 / 20230814 / Ziliang_yan 

1、BOM (2V1)
	1) Remove R22 and R18 to disable auto download
2、Others
	1）Add‘钢网文件和生产文件-EV722F00-1V0’
	
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HDK-EV722F00-2V2 / 20230921 / Ziliang_yan 

1、SCH (2V1)
	1) Update default values of 5V to 3.3V DCDC circuit for better transient response
2、BOM (2V2)
	1) Update 5V to 3.3V DCDC circuit BOM (R10 R11 R13 C10)
	2) Change R90 to 1.2nH for better harmonics rejection 
	3) Change R336 to 1.5nH for better harmonics rejection
	
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HDK-EV722F00-2V3 / 20240418 / Ziliang_yan 

1、SCH (2V2)
	1) Update description for PA DC power supply

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HDK-EV721DG0-3V0 / 20240820 / Ziliang_yan 

1、Revise the naming of this HDK 

2、SCH PCB BOM (3V0)
	1) Update Audio PA
	2) Update OSPI display connector
	3) Move POR_TH to a pin header, allowing for optional pull-high or pull-low configuration
	4) Relocate Flash to a position farther away from RF 
	5) Connect GND of C21 on LDOC to ball A4 directly on the top layer
	6) Update HDK naming (EV722F00 -> EV721DG0)

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HDK-EV721DG0-4V0 / 20241108 / Ziliang_yan 

1、SCH PCB BOM (4V0)
	1) Insert resistors (62R) in series with the Flash signals 
	



