2,870
edits
Changes
no edit summary
[[File:CM4-to-CM3-Adapter-03.jpg|thumb|right|CM4 to CM3 Adapter-Installation Directions]]
[[File:CM4-to-CM3-Adapter-04.jpg|thumb|right|CM4 to CM3 Adapter-Interface&Dimensions]]
[[File:CM4-TO-CM3-Adapter-05.png|thumb|right|Interface definition diagram]]
==Overview==
Since the Raspberry Pi Compute Module 3 (CM3) module is in short supply, the CM4 to CM3 adapter is designed to convert CM4 module to CM3 interface.
* Operating temperature: 0℃~80℃
* Dimensions: 67.6x46.5mm/2.66x1.83inch
==User Manual==
'''Why have JP1 & JP2?'''
The VBAT voltage range of CM3 is 2.5-5V, and the VBAT voltage of most CM3 IO boards is 3.3V or 5V, but the VBA voltage of CM4 is only 5V. When the VBAT of the CM3 IO board used is 3.3V, a DC circuit is needed; but if the VBAT of the CM3 IO board is 5V, the DC voltage will produce howling because it does not need to be boosted;
Please shorten JP1 only for CM3 IO board with VBAT voltage less than 5V, or shorten JP2 only for CM3 IO board with VBAT volgate of 5V;
[[File:IMG-2656-jumper-desc-1.jpg|700px|CM4 to CM3 adapter]]
[[File:CM3.jpg|700px|CM3 VBAT voltage]]
* [[File:Cm3-datasheet.pdf|CM3 datesheet]]
* [[File:Cm4-datasheet.pdf|CM4 datesheet]]
But this issue has been solved in the current production batch.
==Packing List==
1x CM4 to CM3 Adapter
==User ManualFAQ==The VBAT voltage range of Q1:Which GPIO can be used after use the CM4 to CM3 is 2.5-5V. The VBAT voltage of most Adapter? A: CM3 IO boards is 3.3V or 5Vhas 46 GPIOs, but the VBA voltage of ranging from GPIO0~GPIO45; while CM4 is has only 5V. When the VBAT of the CM3 IO board used is 3.3V28 GPIOs, a DC circuit is neededranging from GPIO0~GPIO27; but so if you want to use CM4 to replace CM3, GPIO can only use GPIO0~GPIO27, because CM4 has only 28 GPIO, please refer to the VBAT datasheet of the CM4 and CM3 IO board is 5V, thanks! Q2: Does the DC voltage will produce howling because it does not need CM4 to be boosted;CM3 Adapter support CM4 Lite? [[FileA:Yes, you can use the CM4 to CM3 Adapter covert CM4 Lite to CM3Lite.jpg|But please make sure your CM3]]But this issue has been solved in IO board is support the current production batchCM3 Lite, then you can use it.
<!--Add review function! -->