顯示LED-ht16k33 matrix 使用技術

 Changing Addresses

You can change the address of a backpack very easily. Look on the back to find the two or three A0, A1 or A2 solder jumpers.

Each one of these is used to hardcode in the address. If a jumper is shorted with solder, that sets the address. 

A0sets the lowest bit with a value of 1, A1 sets the middle bit with a value of 2 and A2 sets the high bit with a value of 4.

The final address is 0x70 + A2 + A1 + A0. So for example if A2 is shorted and A0 is shorted, the address is 0x70 + 4 + 1 = 0x75.

If only A1 is shorted, the address is 0x70 + 2 = 0x72

A2 does not appear on the mini 0.8" 8x8 matrix, so you cannot set the address higher than 0x73