PIC18F4850 will not oscillate

[IRQ_Diode]

Bruce,

I did try your suggestion and added the line:

__CONFIG _CONFIG2L, _PWRT_ON_2L & _BOREN_BOHW_2L & _BORV_3_2L

The programmer read the configurations bits correctly, but the PIC still will not oscillate. I also went and checked the caps just to make sure that they were not resistors, and well they were not.

I am considering that it could be the actual part number of the crystal itself. The only thing I have not tried is to place a series resistor to one side of the oscillator. I would have to cut the trace and make sure that I do not short anything to the ground pour around the oscillator.

So before I do that, is there anything else someone can think of? Microchip is taking its time to respond, and I need to send the gerber files to the manufacturer soon.

Thanks,

IRQ

[Bruce]

Can you upload the compiled .HEX file you're programming into this part in .ZIP file?

[IRQ_Diode]

I have uploaded and below for refrence

:020000040000FA
:100000005CEF01F0E95004009EA8FDD7AD6ED880EA
:1000100059EF01F0019E0350D8B4018E200E026EFC
:10002000E86A1A361B361C361D36E83452D802668A
:10003000F7D71200019E0350D8B4018E0A0E026E4B
:100040003B0E196E9A0E186ECA0E176E000E35D83A
:10005000050E196EF50E186EE10E176E000E2DD8F6
:10006000196A980E186E960E176E800E26D8196AA9
:100070000F0E186E420E176E400E1FD8196A010E31
:10008000186E860E176EA00E18D8196A186A270EF9
:10009000176E100E12D8196A186A030E176EE80E42
:1000A0000CD8196A186A176A640E07D8196A186A90
:1000B000176A0A0E02D81A500CD0166E1D50156E13
:1000C0001C50146E1B50136E1A50126E2DEC01F062
:1000D0001250126E024E019E035003E0025CD8B033
:1000E00012001250D8A4019E01BE1200300F53EF2F
:1000F00001F0080E1E6E11C0EAFF0FC0E9FF0D509F
:1001000001B4AAEC00F001A4ACEC00F011C0E2FFD5
:100110000FC0E1FF0E50120FE96E0C1CEF161E50BF
:1001200011E001B0F0EC00F00EC0E9FF153214321E
:1001300013321232EF500C10D8A00C18EF6E04D806
:100140001E2EF4D759EF01F00D50E71A000000D031
:10015000E71A1200EF1203D0FF0AEF1601D0FF0AD0
:10016000E988E92AEC1659EF01F0E834E834FC0B91
:100170000109C212C009C216C050F80B0309C06EB3
:10018000000E136E140EDFEC00F0C282C2B2FED776
:10019000C450136EC35059EF01F0176A186A196AF8
:1001A000166EE86A1606175A185A195AD8A059EF47
:1001B00001F0030E136EE30E02D8F3D7136AF50FA6
:1001C000126EFE0E04E300D004001226FDE20000D1
:1001D00012261306F9E212A002D000D0000012008D
:1001E000166A176A186A196A08D01532143213325F
:1001F00012321636173618361936FF0FF6E2195036
:10020000156E1850146E1750136E1650126E59EF6B
:1002100001F0166E030E03D0166E060E00D0026EAD
:100220000AD0026E1950151815E61950155C08E130
:100230001850145C05E11750135C02E11650125C73
:10024000040ED8B0010ED8B4020E0214D8A4FF0ECA
:1002500059EF01F01550195CF3D71A6A1B6A1C6A32
:100260001D6A200E1E6E15341A361B361C361D36BE
:1002700016501A5E17501B5A18501C5A19501D5A06
:1002800009E216501A2617501B2218501C2219502A
:100290001D22D89012361336143615361E2EE3D78B
:1002A000125059EF01F0E96EFB6A0B50FA6E0A50DA
:1002B000F96E0001040012000C0EAF6E200EAC6E41
:1002C000900EAB6E3D0EC26E0A0EC16E720ED36EF4
:1002D000070EB46E2F0E926ED90E936E940E946E1E
:1002E0009568966A25682468296A266827682868B8
:1002F00038EC02F0A3EC01F0560E85DE430E83DEEF
:10030000530E81DE5F0E7FDE500E7DDE490E7BDEFA
:100310004E0E79DE530E77DE200E75DE3D0E73DE57
:10032000200E71DE250E6FDE036A29C01AF01B6AEB
:100330001C6A1D6A040E0A6E0B6A6CDE0A0E63DE0E
:100340000D0E61DED5D783CF24F004002450255C48
:10035000D8B435EF02F04E0E56DE4F0E54DE200EAE
:1003600052DE430E50DE480E4EDE410E4CDE4E0E87
:100370004ADE470E48DE450E46DE0A0E44DE24B055
:10038000298024A0299024B4298224A4299204003D
:1003900029500308D8A4E0EF01F0210E266E480E84
:1003A000276E286A430E2FDE410E2DDE530E2BDE04
:1003B000450E29DE330E27DE0A0E25DE33EF02F06E
:1003C000040029500208D8A4F9EF01F0266A480E6B
:1003D000276EBF0E286E430E16DE410E14DE530E3E
:1003E00012DE450E10DE320E0EDE0A0E0CDE33EF8C
:1003F00002F0040029500108D8A418EF02F0210EE1
:10040000266E276A400E286E430E03EC00F0410E64
:1004100003EC00F0530E03EC00F0450E03EC00F08B
:10042000310E03EC00F00A0E03EC00F033EF02F0A3
:10043000040029500008D8A433EF02F0266827688A
:100440002868430E03EC00F0410E03EC00F0530E5D
:1004500003EC00F0450E03EC00F0300E03EC00F06E
:100460000A0E03EC00F029EC03F024C025F0120082
:10047000040E7BDE226E13C023F022C012F023C0D4
:1004800013F0020E176E9A0EC7DED8A491EF02F099
:100490008290560E03EC00F0420E03EC00F0410E89
:1004A00003EC00F0540E03EC00F05F0E03EC00F0E0
:1004B000530E03EC00F0450E03EC00F04E0E03EC7F
:1004C00000F0530E03EC00F0450E03EC00F0200E9C
:1004D00003EC00F03E0E03EC00F0200E03EC00F005
:1004E0004F0E03EC00F04E0E03EC00F05F0E03EC39
:1004F00000F0560E03EC00F04F0E03EC00F04C0E33
:1005000003EC00F0540E03EC00F0410E03EC00F09D
:10051000470E03EC00F0450E03EC00F00A0E03EC6E
:1005200000F022C012F023C013F0020E176E8D0EE1
:1005300070DED8A4E8EF02F08280560E03EC00F0E3
:10054000420E03EC00F0410E03EC00F0540E03ECFD
:1005500000F05F0E03EC00F0530E03EC00F0450ECC
:1005600003EC00F04E0E03EC00F0530E03EC00F031
:10057000450E03EC00F0200E03EC00F03C0E03EC03
:1005800000F0200E03EC00F04F0E03EC00F0460EDE
:1005900003EC00F0460E03EC00F05F0E03EC00F0FD
:1005A000560E03EC00F04F0E03EC00F04C0E03EC83
:1005B00000F0540E03EC00F0410E03EC00F0470E87
:1005C00003EC00F0450E03EC00F00A0E03EC00F023
:1005D000560E03EC00F0420E03EC00F0410E03EC6B
:1005E00000F0540E03EC00F05F0E03EC00F0530E2D
:1005F00003EC00F0450E03EC00F04E0E03EC00F0AF
:10060000530E03EC00F0450E03EC00F03A0E03EC41
:1006100000F0036A22C01AF023C01BF01C6A1D6A96
:10062000040E0A6E0B6A1AEC00F0200E03EC00F0C8
:10063000036A000EC2B2010E1A6E1B6A1C6A1D6AA2
:10064000040E0A6E0B6A0AEC00F00A0E03EC00F0CE
:1006500012008490840E0E6E0F0E106E040E0C6E3F
:10066000840E0F6E0F0E116E020E0D6E016A28C001
:1006700012F0136A146A156A79EC00F027C012F0C0
:10068000136A146A156A79EC00F026C012F0136A36
:10069000146A156A79EC00F084800A0ECDEC00F043
:1006A00084904C0E03EC00F0450E03EC00F0440E79
:1006B00003EC00F0530E03EC00F03D0E03EC00F0F1
:1006C0003D0E03EC00F03E0E03EC00F0200E03ECB8
:1006D00000F0250E03EC00F0036A28C01AF01B6A34
:1006E0001C6A1D6A040E0A6E0B6A0AEC00F0200EEA
:1006F00003EC00F0036A27C01AF01B6A1C6A1D6A2B
:10070000040E0A6E0B6A0AEC00F0200E03EC00F0F7
:10071000036A26C01AF01B6A1C6A1D6A040E0A6E60
:0E0720000B6A0AEC00F00A0E03EC00F0120067
:020000040030CA
:0E00000000021E13008081000FC00FE00F40B1
:00000001FF

Thank you for looking into this

[mackrackit]

You do still do not have the OSC set for HS

[Darrel Taylor]

Dave, I don't think you imported the .hex file.

Here's what meProg shows ...

[mackrackit]

Dave, I don't think you imported the .hex file.

DOH!!! I imported something... Now that I do it again, MPLAB shows the same as you.

[Archangel]

Hi,
It looks like all your smt caps are shorted in the PCb traces, is that possible ?

[mark_s]

Another silly thought. Some times you can open a hex file in the melabs programmer and it's not the latest. The compiler may be storing it in a different directory. You may be opening an older version of your hex file from another directory. As much as you modify your basic code, you keep programing the chip with the same hex. Recompile and check the date and time stamp on the file. I have used that chip before and it is not difficult to get working. If you post your code, someone can compile it and see whats going on.