TOA Electronics FPS1000-48, FPS1000-24, FPS-S1U Block diagram of the I2C option, Eeprom functions

7.3 Block diagram of the I2C option

Refer to Fig 7-1 for description of the I2C block diagram and for typical application.

	A0	Output Fail
		OTP
	A1
		Temperature Alarm
	A2
		Fan Fail
	REGISTER
		AC Input Fail
	A0	Output voltage
	A1	Output current
	A2
	ADC	Temperature
A0	A0
A1	A1
A2	A2
	EEPROM
Fig 7-1: I2C option bloack diagram		Serial CLOCK
		Serial DATA

7.4 Operation and functions 7.4.1. Digital status

Digital status functions are provided by a PCF8574, 8-bit Register. It provides a single 8-bit word when read by the I2C controller. Fault is indicated by "1" and Good level is indicated by "0".

Refer to Table 7-1 for the register information.

	BIT		FUNCTION				MEANING
	0		Output Fail				Output voltage is <80% +/- 5% of Vout rated
	1		Over Temperature Protection				Internal temperature is over 80°C. Supply turns off.
	2		Temperature Alarm				Internal temperature is over 70°C. Supply is on.
	3		Fan Fail				Failure of an internal fan.
	4		AC Input Fail				AC Input <85Vac
	5		Not Used				Always "0".
	6		Not Used				Always "0".
	7		Not Used				Always "0".
Table 7-1
PCF8574 slave address:
	Bit	7		6	5	4		3	2	1	0
	Value	0		1	0	0		A2	A1	A0	R/W

7.4.2 EEPROM functions

A 256 bytes EEPROM included in the I2C option. The EEPROM type is AT24C02 and it is programmed at the factory with the data shown in Table 7-2.

ADDRESS	BYTES	DATA
0	4	Number of fields
4	16	Manufacturer
20	20	Serial number
40	16	Revision
56	16	Country of manufacture
72	16	Model name
88	16	Output voltage
104	16	Date of manufacture
254	2	Checksum

Table 7-2

The slave EEPROM address is:

Bit	7	6	5	4	3	2	1	0
Value	1	0	1	0	A2	A1	A0	R/W

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