DS2777 MAXIM [Maxim Integrated Products], DS2777 Datasheet - Page 44

• Manufacturer Part Number: DS2777
• Description: 2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication
• Manufacturer: MAXIM [Maxim Integrated Products]

2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
Table 15. Function Commands
For the latest package outline information and land patterns, go
to www.maxim-ic.com/packages.
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
44 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2008 Maxim Integrated Products
+ Denotes a lead-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
PACKAGE TYPE
FUNCTION
Read ROM
Copy Data
Lock
14 TDFN
ID
PART
EEPROM
TARGET
BLOCK
—
0
1
0
1
0
1
PACKAGE CODE
Package Information
INTERFACE
T1435+1
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
DOCUMENT NO.
56-G0010-001
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
is a registered trademark of Maxim Integrated Products, Inc.
TOP VIEW
*EXPOSED PAD
V
V
V
V
CC
DC
IN2
IN1
VB
DD
SS
DESCRIPTION
1
2
3
4
5
6
7
+
(3mm
TDFN-EP
DS2775
DS2776
DS2777
DS2778
×
Pin Configuration
5mm)
*EP
EEC
14
13
12
11
10
9
8
, is 2ms
CP
SRC
SCL/OVD
SDA/DQ
PLS
PIO
SNS