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51单片机I2C源代码

---- P3SFS Matches (2 in 2 files) ----
UPSD3300.h:DEFINE_SFR(P3SFS,0x91)      // Port 3 I/O select
Upsd3300_i2c.c:	P3SFS |= 0xC0;						// Enable P3.7 for SCL, P3.6 for SDA