Stand-Alone Fuel Gauge - Maxim Integrated Products - (Version JPG) - Page n° 19 - PDF Catalogue | Technical Documentation

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Switch, Digital potentiometer, Converter, Non-volatile memory, Amplifier

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DS2780 Standalone Fuel Gauge IC

CONTROL REGISTER

All CONTROL register bits are read and write accessible. The CONTROL register is recalled from Parameter EEPROM memory at power-up. Register bit values can be modified in shadow RAM after power-up. Shadow RAM values can be saved as the power up default values by using the Copy Data command.

Figure 15. Control Register Format


Address	60h		Bit Definition
Field	Bit	Format	Allowable Values
Reserved	7		Undefined
UVEN	6	Read/Write	Under Voltage SLEEP Enable 0: Disables transition to SLEEP mode based on VIN voltage 1: Enables transition to SLEEP mode if, VIN < V_SLEEP AND DQ stable at either logic level for t_SLEEP
PMOD	5	Read/Write	Power Mode Enable 0: Disables transition to SLEEP mode based on DQ logic state 1: Enables transition to SLEEP mode if DQ at a logic low for t_SLEEP
RNAOP	4	Read/Write	Read Net Address Opcode 0: Read Net Address Command = 33h 1: Read Net Address Command = 39h

Reserved 0:3 Undefined

SPECIAL FEATURE REGISTER

All Special Feature Register bits are read and write accessible, with default values specified in each bit definition.

Figure 16. Special Feature Register Format


Address	15h		Bit Definition
Field	Bit	Format	Allowable Values
Reserved	1:7		Undefined
PIOSC	0	Read/Write	PIO Sense and Control Read values 0: PIO pin < Vil 1: PIO pin > Vih Write values 0: Activates PIO pin open-drain output driver, forcing the PIO pin low 1: Disables the output driver, allowing the PIO pin to be pulled high or used as an input Power-up and SLEEP mode default: 1 (PIO pin is hi-Z) Note: PIO pin has weak pulldown

EEPROM REGISTER

The EEPROM register provides access control of the EEPROM blocks. EEPROM blocks can be locked to prevent alteration of data within the block. Locking a block disables write access to it. Once a block is locked, it cannot be unlocked. Read access to EEPROM blocks is unaffected by the lock/unlock status.

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Stand-Alone Fuel Gauge - Maxim Integrated Products - #19

Switch, Digital potentiometer, Converter, Non-volatile memory, Amplifier