P80C557E4 microcontroller equivalent, single-chip 8-bit microcontroller.
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80C51 central processing unit 32 K × 8 ROM.
The P80C557E4/P83C557E4/P89C557E4 (hereafter generically referred to as P8xC557E4) single-chip 8-bit microcontroller is manufactured in an advanced CMOS process and is a derivative of the 80C51 microcontroller family. The P8xC557E4 has the same instr.
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