87L54 microcontrollers equivalent, low voltage chmos single-chip 8-bit microcontrollers.
of the MCS-51 Family as listed below Port Pin P3 0 P3 1 P3 2 P3 3 P3 4 P3 5 P3 6 P3 7 Alternate Function RXD (serial input port) TXD (serial output port) INT0 (external i.
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