51 Single -chip microcomputer Small system board STC89C52 STC51 STC89C52RC core development learning board

Link: https: //pan.baidu.com/s/1zd5fuqnviycg4br2muxqg
Extract code: 1234
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Regarding the problem of pulling resistance on the P0 mouth:

If it is used in STC89C52 version, if P0 is used for external output drive, external pull -up resistance is required, and general LCD bus, such as LCD1602, LCD12864 bus, can be used directly without external pull -up resistance.

If it is the STC12C5A60S2 version, you can use the register P0M1 and P0M0 to set the driver method of IO.No external pull -up resistance is required

Product Attributes
Brand	none
Model	STC89C52RC

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