Datasheet

ManualsBrandsMAXIM INTEGRATED ManualsPMICsPMIC - system monitor Dual voltage detector TQFN 20 EP

MAX6884/MAX6885

Configuration Lock

Lock the configuration register bank and configuration

EEPROM contents after initial programming by setting

the lock bit high (see Table 10). Locking the configura-

tion prevents write operations to configuration EEPROM

and configuration registers except the configuration

lock bit. Set the lock bit to 0 to reconfigure the device.

Write Disable

A unique write disable feature protects the

MAX6884/MAX6885 from inadvertent user EEPROM

writes. As input voltages that power the serial interface,

a µP, or any other writing devices fall, unintentional

data may be written onto the data bus. The user

EEPROM write-disable function (see Table 11) ensures

that unintentional data does not corrupt the MAX6884/

MAX6885 user EEPROM data.

EEPROM-Programmable, Hex

Power-Supply Supervisory Circuits

22 ______________________________________________________________________________________

ADDRESS

BIT RANGE

DESCRIPTION

[0] 1 = IN1 Voltage Falls Below Primary Undervoltage Threshold

[1] 1 = IN2 Voltage Falls Below Primary Undervoltage Threshold

[2] 1 = IN3 Voltage Falls Below Primary Undervoltage Threshold

[3] 1 = IN4 Voltage Falls Below Primary Undervoltage Threshold

[4] 1 = IN5 Voltage Falls Below Primary Undervoltage Threshold

[5] 1 = IN6 Voltage Falls Below Primary Undervoltage Threshold

28h

[7:6] Unused

[0] 1 = IN1* Voltage Falls Below Secondary Threshold

[1] 1 = IN2* Voltage Falls Below Secondary Threshold

[2] 1 = IN3* Voltage Falls Below Secondary Threshold

[3] 1 = IN4* Voltage Falls Below Secondary Threshold

[4] 1 = IN5* Voltage Falls Below Secondary Threshold

[5] 1 = IN6* Voltage Falls Below Secondary Threshold

29h

[7:6] Unused

[0] 1 = UV/OV Has Been Asserted

[1] 1 = RESET Has Been Asserted

[6:2] Unused

2Ah

[7] 1 = WDO Has Been Asserted

Table 9. Fault Registers (28h–2Ah)

ADDRESS

EEPROM

MEMORY

ADDRESS

BIT RANGE DESCRIPTION

16h 96h [3]

1 = Configuration Locked

0 = Configuration Unlocked

Table 10. Configuration Lock Bit

*Does not matter if set as undervoltage or overvoltage.