51 single-chip microcomputer minimum system board STC89C52 STC51 STC89C52RC core development learning board

HS1894
AA1558

51 single-chip microcomputer minimum system board STC89C52 STC51 STC89C52RC core development learning board

About the P0 port pull-up resistor problem:

If the STC89C52 version is used, if the P0 port is used for external output driving, an external pull-up resistor is required. For a general LCD bus such as LCD1602 and LCD12864, it can be used directly without an external pull-up resistor.

In the STC12C5A60S2 version, the IO drive mode can be set using the registers P0M1 and P0M0. No external pull-up resistor required

570
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51 single-chip microcomputer minimum system board STC89C52 STC51 STC89C52RC core development learning board

About the P0 port pull-up resistor problem:

If the STC89C52 version is used, if the P0 port is used for external output driving, an external pull-up resistor is required. For a general LCD bus such as LCD1602 and LCD12864, it can be used directly without an external pull-up resistor.

In the STC12C5A60S2 version, the IO drive mode can be set using the registers P0M1 and P0M0. No external pull-up resistor required

MANUFACTURER
HAITRONIC
MPN
HS1894
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