DS2782G+ Maxim Integrated Products, DS2782G+ Datasheet - Page 21

• Manufacturer Part Number: DS2782G+
• Description: IC FUEL GAUGE BATT 10-TDFN
• Manufacturer: Maxim Integrated Products

Specifications of DS2782G+

• Function: Fuel, Gas Gauge/Monitor
• Battery Type: Lithium-Ion (Li-Ion), Lithium-Polymer (Li-Pol)
• Voltage - Supply: 2.5 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 10-TDFN Exposed Pad
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

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 the block. Once a block is locked, it
cannot be unlocked. Read access to EEPROM blocks is unaffected by the lock/unlock status.
Figure 21. EEPROM Register Format
EEC
LOCK
Reserved
BL1
BL0
PROGRAMMABLE SLAVE ADDRESS
The 2-Wire slave address of the DS2782 is stored in the parameter EEPROM block, address 7Eh. Programming
the slave address requires a write to set the SAWE (Slave Address Write Enable) bit in the Special Features
register, followed by a write to 7Eh with the desired slave address. The new slave address value is effective
following the write to 7Eh, and must be used to address the DS2782 on subsequent bus transactions. The slave
address value is not stored to EEPROM until a Copy EEPROM block 1 command is executed. Prior to executing
the Copy command, power cycling the DS2782 restores the original slave address value. The data format of the
slave address value in address 7Eh is shown in Figure 22. When not writing the slave address, the SAWE bit
should be written to a 0.
Figure 22. Slave Address Format
A6-A0: Slave Address. A6-A0 contains the 7-bit slave address of the DS2782. The factory default is 0110100b.
X:
ADDRESS
FIELD
Reserved Bits.
BIT 7
1Fh
A6
BIT
2:6
7
6
1
0
Read Only
Read Only
Read Only
BIT 6
FORMAT
Write to 1
A5
Read /
BIT 5
A4
EEPROM Copy Flag
Set to 1 when: Copy Data command executed
Cleared to 0 when: Copy Data command completes
Note: While EEC = 1, writes to EEPROM addresses are ignored
Power-up default: 0
EEPROM Lock Enable
Host write to 1: Enables the Lock command. Host must issue Lock
Cleared to 0 when: Lock command completes or when Lock command
Power-up default: 0
Undefined
EEPROM Block 1 Lock Flag (Parameter EEPROM 60h – 7Fh)
0: EEPROM is not locked
1: EEPROM block is locked
Factory default: 0
EEPROM Block 0 Lock Flag (User EEPROM 20h – 2Fh)
0: EEPROM is not locked
1: EEPROM block is locked
Factory default: 0
command as next command after writing Lock Enable bit to 1.
not the command issued immediately following the Write command
used to set the Lock Enable bit.
BIT 4
ADDRESS 7Eh
A3
21 of 28
BIT 3
A2
ALLOWABLE VALUES
BIT DEFINITION
BIT 2
A1
BIT 1
A0
BIT 0
X