Interfacing to External EEPROM - Revision history

ScottMcLeod: /* Circuit */

2008-03-20T00:19:19Z

Circuit

← Older revision		Revision as of 19:19, 19 March 2008
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	[[Image:i2c_eeprom_circuit_picture.jpg\|thumb\|400x300 px\|center]]		[[Image:i2c_eeprom_circuit_picture.jpg\|thumb\|400x300 px\|center\|Picture of Circuit Layout]]
	[[Image:i2c_eeprom_RC3_pullout.jpg\|thumb\|400x300 px\|center]]		[[Image:i2c_eeprom_RC3_pullout.jpg\|thumb\|400x300 px\|center\|Picture of RC3 (PIN18) on PIC18F4520]]

	== Code ==		== Code ==

2008-03-20T00:18:52Z

Circuit

← Older revision		Revision as of 19:18, 19 March 2008
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	[[Image:i2c_eeprom_circuit_picture.jpg\|400x300 px\|center]]		[[Image:i2c_eeprom_circuit_picture.jpg\|thumb\|400x300 px\|center]]
	[[Image:i2c_eeprom_RC3_pullout.jpg\|400x300 px\|center]]		[[Image:i2c_eeprom_RC3_pullout.jpg\|thumb\|400x300 px\|center]]

	== Code ==		== Code ==

2008-03-20T00:16:53Z

Circuit

← Older revision		Revision as of 19:16, 19 March 2008
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	[[Image:i2c_eeprom_circuit_picture.jpg\|center]]		[[Image:i2c_eeprom_circuit_picture.jpg\|400x300 px\|center]]
	[[Image:i2c_eeprom_RC3_pullout.jpg\|center]]		[[Image:i2c_eeprom_RC3_pullout.jpg\|400x300 px\|center]]

	== Code ==		== Code ==

2008-03-20T00:16:29Z

Circuit

← Older revision		Revision as of 19:16, 19 March 2008
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	[[Image:i2c_eeprom_circuit_picture.jpg~~\|thumb~~\|center]]		[[Image:i2c_eeprom_circuit_picture.jpg\|center]]
	[[Image:i2c_eeprom_RC3_pullout.jpg~~\|thumb~~\|center]]		[[Image:i2c_eeprom_RC3_pullout.jpg\|center]]

	== Code ==		== Code ==

2008-03-20T00:16:05Z

Circuit

← Older revision		Revision as of 19:16, 19 March 2008
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	PIN8, Vcc is required to power the EEPROM.		PIN8, Vcc is required to power the EEPROM.

2008-03-20T00:15:53Z

Circuit

← Older revision		Revision as of 19:15, 19 March 2008
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	[[Image:i2c_eeprom_circuit_picture.jpg\|~~500x400 px~~\|center]]		[[Image:i2c_eeprom_circuit_picture.jpg\|thumb\|center]]
	[[Image:i2c_eeprom_RC3_pullout.jpg\|~~500x400 px~~\|center]]		[[Image:i2c_eeprom_RC3_pullout.jpg\|thumb\|center]]

	== Code ==		== Code ==

2008-03-20T00:13:55Z

Circuit

← Older revision		Revision as of 19:13, 19 March 2008
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	PIN8, Vcc is required to power the EEPROM.		PIN8, Vcc is required to power the EEPROM.


			[[Image:i2c_eeprom_circuit_picture.jpg\|500x400 px\|center]]
			[[Image:i2c_eeprom_RC3_pullout.jpg\|500x400 px\|center]]

	== Code ==		== Code ==

2008-03-19T02:52:30Z

← Older revision		Revision as of 21:52, 18 March 2008
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	i2c_write(data); // Data to write		i2c_write(data); // Data to write
	i2c_stop(); // Release BUS		i2c_stop(); // Release BUS
	delay_ms(25); // Let EEPROM Write Data		delay_ms(5); // Let EEPROM Write Data (5ms from data sheet)
	}		}

2008-03-19T02:49:26Z

← Older revision		Revision as of 21:49, 18 March 2008
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	To the right is the circuit diagram for interfacing to the 18F4520.		To the right is the circuit diagram for interfacing to the 18F4520.

	[[Image:i2c_eeprom_circuit.jpg\|~~400x300~~ px\|right]]		[[Image:i2c_eeprom_circuit.jpg\|500x400 px\|right]]

	PIN1 and PIN2, A0 and A1 are hardware addressing bits, they correspond to 0xA0 (writing data) and 0xA1 (reading data). The first 4 bits are internally set to 1010 (A) and the second four correspond to the block of memory (0 or 1), A0 and A1 (hardware addressing we set to low in this circuit diagram) and read/(NOT write).		PIN1 and PIN2, A0 and A1 are hardware addressing bits, they correspond to 0xA0 (writing data) and 0xA1 (reading data). The first 4 bits are internally set to 1010 (A) and the second four correspond to the block of memory (0 or 1), A0 and A1 (hardware addressing we set to low in this circuit diagram) and read/(NOT write).

2008-03-19T02:48:59Z

Circuit

← Older revision		Revision as of 21:48, 18 March 2008
Line 15:		Line 15:
	To the right is the circuit diagram for interfacing to the 18F4520.		To the right is the circuit diagram for interfacing to the 18F4520.

	[[Image:i2c_eeprom_circuit.jpg\|~~300x200~~ px\|right]]		[[Image:i2c_eeprom_circuit.jpg\|400x300 px\|right]]

	PIN1 and PIN2, A0 and A1 are hardware addressing bits, they correspond to 0xA0 (writing data) and 0xA1 (reading data). The first 4 bits are internally set to 1010 (A) and the second four correspond to the block of memory (0 or 1), A0 and A1 (hardware addressing we set to low in this circuit diagram) and read/(NOT write).		PIN1 and PIN2, A0 and A1 are hardware addressing bits, they correspond to 0xA0 (writing data) and 0xA1 (reading data). The first 4 bits are internally set to 1010 (A) and the second four correspond to the block of memory (0 or 1), A0 and A1 (hardware addressing we set to low in this circuit diagram) and read/(NOT write).
Line 30:		Line 30:

	PIN8, Vcc is required to power the EEPROM.		PIN8, Vcc is required to power the EEPROM.


	== Code ==		== Code ==