im using a pic16F877 but running out of memory.
i whould like to use pic18F4420 which has 16k of memory and 256k of EEprom.
but flowcode says that it cant fit project.
can you help.
Thanks
W millard
importing project to new pic.
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wayne millard
- Posts: 234
- Joined: Thu May 31, 2007 2:18 pm
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importing project to new pic.
Hi,
im using a pic16F877 but running out of memory.
i whould like to use pic18F4420 which has 16k of memory and 256k of EEprom.
but flowcode says that it cant fit project.
can you help.
Thanks
W millard
im using a pic16F877 but running out of memory.
i whould like to use pic18F4420 which has 16k of memory and 256k of EEprom.
but flowcode says that it cant fit project.
can you help.
Thanks
W millard
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Sean
- Valued Contributor
- Posts: 548
- Joined: Tue Jun 26, 2007 11:23 am
- Has thanked: 6 times
- Been thanked: 44 times
Hello Wayne,
The 16k bytes of Flash memory in the 18F4420 are used 2 bytes at a time due to the 16-bit program word format, resulting in 8k words
The 16F877 has 14k bytes of flash that are used 14-bits at a time, giving it the same 8k of program words.
Devices with more program memory include the 18F4455 with 24k bytes of Flash (12k words) and the 4520 with 32k bytes of Flash (16k words).
Try to import your project into a flowchart with one of these devices as the target to see if this would solve the problem.
The 16k bytes of Flash memory in the 18F4420 are used 2 bytes at a time due to the 16-bit program word format, resulting in 8k words
The 16F877 has 14k bytes of flash that are used 14-bits at a time, giving it the same 8k of program words.
Devices with more program memory include the 18F4455 with 24k bytes of Flash (12k words) and the 4520 with 32k bytes of Flash (16k words).
Try to import your project into a flowchart with one of these devices as the target to see if this would solve the problem.