Port 1 also receives code data during Flash programming and verification. 4.4 Port 3 Port 3 pins P3.0 to P3.5, P3.7 are seven bi-directional I/O pins with internal pull-ups. P3.6 is hard-wired as an input to the
80368H–MICRO–6/08AT89C2051To Program and Verify the Array:4.Apply data for Code byte at location 000H to P1.0 to P1.7.5.Raise RST to 12V to enable programming.6.Pulse P3.2 once to program a byte in the PEROM array or the lock bits. The byte-write 数据