| ??? 09/23/07 11:59 Read: times |
#144917 - Invoking the bootloader for LPC900 Micro's Responding to: ???'s previous message |
There are two "hardware" entry methods for invoking the bootloader.
"Hardware" means you have to build some hardware OR purchase a programmer that has the hardware on it. These two methods are detailed in the data sheet and user manual of the LPC900 series (including the P89LPC9408). a) ISP In system programming Immediately after power on reset the reset line should be pulsed 50uS apart (3 times) to invoke the bootloader so Flashmagic can talk to LPC900 UART for serial programming. Check the schematic example from the Keil MCB900 development board here http://www.keil.com/mcb900/mcb900-schematics.pdf and other info here www.keil.com/mcb900 b) ICP In-Circuit Programming.. Immediately after power on reset pulse the reset line 50uS apart (7times) and the LPC900 will go in to ICP programming mode. This requires much more complicated synchronous serial communications. Consult the User Manuals and Flashmagic web site for application notes and other details. Joe |
| Topic | Author | Date |
| reflashing P89LPC9408 that has no 'notouch' code | 01/01/70 00:00 | |
| yes | 01/01/70 00:00 | |
| too late for an edit | 01/01/70 00:00 | |
Invoking the bootloader for LPC900 Micro's | 01/01/70 00:00 |