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PN7462AU - Problems with communication - ID: 0x00000000

Question asked by Adrian Pakosiński on Feb 24, 2017
Latest reply on Mar 2, 2017 by Adrian Pakosiński



I try to run my own borad with PN7462AU. It is simple board based on typical application (Fig 18. in AN11706). I think the chip is soldered correctly (I have the same problem in two boards). Board is supplied from 5V. Measured voltages:

VBUS = 5,04V

PVDD_OUT = 3,28V

VDD = 1,83V

I use LPC-Link2 and LPCXpresso v8.2.2 and I try to run software examples form NXP. Problem is the same in all examples e.g when I try to run "NfcrdlibEx1_BasicDiscoveryLoop" example, project build correctly and the debug starts.


Debug messenges :


"LPCXpresso RedlinkMulti Driver v8.2 (Sep  5 2016 10:12:38 - crt_emu_cm_redlink build 725)
============= SCRIPT: PN7xxxxx_Connect.scp =============
DpID = 0BB11477
APID = 0x04770021
============= END SCRIPT ===============================
Probe Firmware: LPC-LINK2 CMSIS-DAP V5.173 (NXP Semiconductors)
Serial Number:  I3FWNRAS
VID:PID:  1FC9:0090
USB Path: \\?\hid#vid_1fc9&pid_0090&mi_00#7&1b9a9635&0&0000#{4d1e55b2-f16f-11cf-88cb-001111000030}
Emu(0): Connected&Reset. DpID: 0BB11477. CpuID: 410CC200. Info: <None>
Debug protocol: SWD. RTCK: Disabled. Vector catch: Disabled.
inspected v.2 On-chip Flash Memory C:\nxp\LPCXpresso_8.2.2_650\lpcxpresso\bin\Flash\PN7xxxxx_154k.cfx
image 'PN7xxxxx_154k Mar  8 2016 16:35:09'
NXP: PN7462AU-C2-00  Part ID: 0x00000000
Connected: was_reset=true. was_stopped=false
LPCXpresso Free License - Download limit is 256K
Opening flash driver C:\nxp\LPCXpresso_8.2.2_650\lpcxpresso\bin\Flash\PN7xxxxx_154k.cfx
Writing 86992 bytes to address 0x00203000 in Flash
Erased/Wrote page  0-42 with 86992 bytes in 1941msec
Flash Write Done
Flash Program Summary: 86992 bytes in 1.94 seconds (43.77 KB/sec)


Stopped: Breakpoint #1


I assume that Part ID: 0x00000000 is incorrect. Maybe someone knows what could be the reason ?


Despite this debug starts. But when I resume project it stops on line (in phFlashBoot.c):


"    /* Ensure the Major version of EEPROM is correct
     * Warning: Firmware might be tightly linked with the EEPROM contents and layout.
     * If there is a mismatch please do upgrade.
     * */




The problem is the same in all examples in two the same boards, always ID: 0x00000000. I have no idea of the problem is on hardware (wrong application - I don't think so because voltage measured look properly)  or software (maybe I should change something in example properties or something is wrong in LPC-Link2) ?


Thank you for your help.