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Using AN4 to AN7 in 18F4520

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FFT

Joined: 07 Jul 2010
Posts: 92

Using AN4 to AN7 in 18F4520

Posted: Wed Feb 09, 2011 1:18 pm

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Hi all,

I want to use AN4,5,6,7 pins as analog and the others as digital but in 18F4520.h file are given only these options below:

Code:

#define AN0_TO_AN11 0x03 // A0 A1 A2 A3 A5 E0 E1 E2 B2 B3 B1 B4
#define AN0_TO_AN10 0x04 // A0 A1 A2 A3 A5 E0 E1 E2 B2 B3 B1
#define AN0_TO_AN9 0x05 // A0 A1 A2 A3 A5 E0 E1 E2 B2 B3
#define AN0_TO_AN8 0x06 // A0 A1 A2 A3 A5 E0 E1 E2 B2
#define AN0_TO_AN7 0x07 // A0 A1 A2 A3 A5 E0 E1 E2
#define AN0_TO_AN6 0x08 // A0 A1 A2 A3 A5 E0 E1
#define AN0_TO_AN5 0x09 // A0 A1 A2 A3 A5 E0
#define AN0_TO_AN4 0x0A // A0 A1 A2 A3 A5
#define AN0_TO_AN3 0x0B // A0 A1 A2 A3
#define AN0_TO_AN2 0x0C // A0 A1 A2
#define AN0_TO_AN1 0x0D // A0 A1
#define AN0 0x0E // A0

How to use only AN4 to 7 pins as analog?

Best wishes

Ttelmah

Joined: 11 Mar 2010
Posts: 19499


Posted: Wed Feb 09, 2011 1:57 pm

You can't. The patterns offered, are _those supported by the hardware_. Look in the chip's data sheet. Best Wishes

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