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NXP LPC2366

Stephane ibazizene

We are using NXP LPC2366 (100 Pins) microprocessor in a project. The version of uVision is 3.60.

We have received new boards implementing the LPC2366 but we are not able to start the boards. A break point in the start up file (LPC2300.s) is never reached.

The power connections look good and we think we have a clock problem.

1)We decided to use the internal RC clock source (4.0 MHz) but the program never exits the following loop (PLL is not locked)

;  Wait until PLL Locked
PLL_Loop        LDR     R3, [R0, #PLLSTAT_OFS]
                ANDS    R3, R3, #PLLSTAT_PLOCK
                BEQ     PLL_Loop

The LPC2300.s file is configured with the following parameters :

CLOCK_SETUP     EQU     1
SCS_Val         EQU     0x00000000       ; no main osc
CLKSRCSEL_Val   EQU     0x00000000
PLLCFG_Val      EQU     0x00000023  ; N=1 M=35
CCLKCFG_Val     EQU     0x00000004
USBCLKCFG_Val   EQU     0x00000005
PCLKSEL0_Val    EQU     0x00001000
PCLKSEL1_Val    EQU     0x00000000

Any suggestion would be appreciated.

2) We are working on the boot process flowchart of the NXP component. We would like to understand why the Ulink2 debugger can't stop in the LPC2300.s file. Could you describe us the steps performed by the controller before the startup process ? How can we check that ?

Thanks for your assistance.

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