PC89x54A is a single-chip 8-bit microcontroller with the instruction sets fully compatible with industrial-standard 80C51 series microcontroller.
There is 16 Kbytes flash memory embedded for application program. A 47 Kbytes data flash is shared by both In-System Programming code and In-Application-Programming code. In-System-Programming and In-Application-Programming allow the users to download new code or data while the microcontroller sits in the running state.
There are 1280 bytes on-chip RAM embedded that are provided to implement wide field applications. The user can configure the device to run in 12 clocks per machine cycle, or 6 clocks per machine cycle to achieve twice performance.
MPC89x54A is built with four 8-bit I/O ports, one 4-bit I/O ports, three 16-bit timer/counters, an eight-source, four-priority-level interrupt structure, an enhanced UART, and on-chip crystal oscillator. It was fabricated in advanced embedded flash CMOS technology.
Excellent flash-endurance, flash-retention, and code-protecting security make MPC89x54A as an excellent microcontroller.
If the supply voltage of the device is lower than 3.7V/2.4V (Operate in the 5V/3V).The device can automatically go to reset, and we have named the Low-Voltage-Reset
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