NXP Semiconductors P89LPC921 (DIP20) DIP(20) Device

Adapters for Automated Programmers

Adapters for Manual Programmers

Adapters for Engineering Programmers

Last Updated: 05/18/2023

IMPORTANT: Microcontroller with 4Kb Flash.Please set the default buffer value to 0h.The device does not support the Read operation.The Device is verified using the Sum capability of the device.The expected checksum is calculated and compared to the checksum read from the device.When the Boot Status Bit is set the contents of the Boot Vector is used as the high byteof the execution address and the low byte is set to 00H.The factory default setting is 0FH which corresponds to the address 0F00H for the defaultISP boot loader. This boot loader is pre-programmed at the factory into this address spaceand can be erased by the user. If the Sector 3 ISP Protection is set then the sector locationsfrom 0E00H to 0FFFH will not be erased.****************************IMPORTANT !!!******************************To program the options in the Device Config menu you must select the appropriate optionsin that menu AND you must ENABLE secure.Otherwise none of the options will be programmed. The device has three security bits for a sector.If only security bit 0 is programmed then the device cannot be verified. Bit 0 can be erased usingsector erase. If security bit 2 is programmed then the bit and the corresponding sector can onlybe erased by erasing the entire device.