DS2778 Maxim Integrated Products, DS2778 Datasheet - Page 45

• Manufacturer Part Number: DS2778
• Description: 2-Cell Stand-Alone Li+ Fuel-Gauge IC
• Manufacturer: Maxim Integrated Products

Table 15. Function Commands
+ Denotes a lead(Pb)-free/RoHS-compliant package.
T&R = Tape and reel.
DS2775G+
DS2775G+T&R
DS2776G+
DS2776G+T&R
DS2777G+
DS2777G+T&R
DS2778G+
DS2778G+T&R
Recall Data
COMMAND
FUNCTION
Read ROM
Copy Data
Lock
ID
PART
Protector and Optional SHA-1 Authentication
2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
EEPROM
TARGET
BLOCK
______________________________________________________________________________________
—
0
1
0
1
0
1
INTERFACE
1-Wire
1-Wire
1-Wire
1-Wire
2-Wire
2-Wire
2-Wire
2-Wire
VALUE
FCmd
B2h
B4h
42h
44h
63h
66h
39h
Selector Guide
This command copies the shadow RAM to the target EEPROM block. Copy data
commands that target locked blocks are ignored. While the Copy Data command is
executing, the EEC bit in the EEPROM register is set to 1, and write data commands
with MAddr set to any address within the target block are ignored. Read data and
write data commands with MAddr set outside the target block are processed while
the copy is in progress. The Copy Data command execution time, t
typical and starts after the FCmd byte is acknowledged. Subsequent copy or lock
commands must be delayed until the EEPROM programming cycle completes.
This command recalls the contents of the targeted EEPROM block to its shadow
RAM.
This command locks (write protects) the targeted EEPROM block. The LOCK bit in
the EEPROM register must be set to 1 before the Lock command is executed. If the
LOCK bit is 0, the Lock command has no effect. The Lock command is permanent;
a locked block can never be written again. The Lock command execution time,
t
copy or lock commands must be delayed until the EEPROM programming cycle
completes.
This command initiates a read of the unique 64-bit ROM ID. After the Read ROM ID
command is sent, the ROM ID can be read with the following sequence:
S SAddr R Data0 A Data1 A ... Data7 N P
EEC
SHA-1
, is 2ms typical and starts after the FCmd byte is acknowledged. Subsequent
Yes
Yes
Yes
Yes
No
No
No
No
For the latest package outline information and land patterns,
go to www.maxim-ic.com/packages. Note that a “+”, “#”, or
“-” in the package code indicates RoHS status only. Package
drawings may show a different suffix character, but the drawing
pertains to the package regardless of RoHS status.
PACKAGE TYPE
14 TDFN
DESCRIPTION
PACKAGE CODE
Package Information
T1435N+1
www.DataSheet4U.com
DOCUMENT NO.
EEC
21-0253
, is 2ms
45