Note that the actual part number of the chip in the 40-pin DIP package is W78E052DDGīecause the Nuvoton W78E052D microcontroller comes with a UART boot-loader, it can directly be programmed from the serial (COM) port. The instruction set is fully compatible with the standard 8052. It contains an 8K-byte Flash EPROM, a 256-byte RAM four 8-bit bi-directional (P0, P1, P2, P3) and bit-addressable I/O ports, an additional 4-bit I/O port P4 three 16-bit timer/counters, a hardware watchdog timer, and a serial port Other specifications match exactly 89S52. It supports ISP program downloading from PC using RX-TX lines only. This chip has separate dedicated 2K boot-loader memory, which makes this chip robust and very stable. W78E052DDG is 8051 compatible 8-bit controller from Nuvoton with 8K programmable flash memory in 40 Pin DIP package It is programmed using ICSP with an external programmer USBASP (AVRDUDE).Ĩ9S52 has no BOOTLOADER, so it cannot be programmed through SERIAL Port.
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