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MPC8309 Custom board with NandFlash

Question asked by Akhilesh Chidare on Sep 28, 2018
Latest reply on Oct 20, 2018 by Yiping Wang

Hi,

we have designed a custom board based on MPC8309. we are targeting NAND flash based Uboot and application.

we have configured reset configuration words nand flash small page. based on that i have configured calculated RCW.

as it is a bare board the RCW are not found in the flash memory. instead i have followed the procedure as suggested in PA arch manual for loading RCW in bare boards. i am using the default files of MPCTWR and changing only the RCWLR and RCWHR values in the MPC8309TWR_HRCW_JTAG.txt present in jtag chains. i have modified the value as below

 

8309 (1 1) (2 0x42040003) (3 0xA4140000) (what actually is 2 and 3 here ?)

 

when following the procedure as suggested by NXP i am seeing the following error.

(Targeting_PA_Processors.pdf to use CodeWarrior JTAG configuration file to override RCW on the target board. )

 

Error message: mpc83xx: cannot put the target into DEBUG mode.

 

is there anything to be modified for NAND based boot? what needs to be done to properly load the RCW via the debugger

 

 

Akhilesh

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