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参数资料
| 型号： | DS2775G+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 37/46页 |
| 文件大小： | 0K |
| 描述： | IC FUEL GAUGE LI+ 2CELL 14-TDFN |
| 产品培训模块： | 1-Wire Communications Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 60 |
| 功能： | 燃料，电量检测计/监控器 |
| 电池化学： | 锂离子（Li-Ion）、锂聚合物（Li-Pol） |
| 电源电压： | 4 V ~ 9.2 V |
| 工作温度： | -20°C ~ 70°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 14-WFDFN 裸露焊盘 |
| 供应商设备封装： | 14-TDFN-EP（3x5） |
| 包装： | 管件 |
| 产品目录页面： | 1436 (CN2011-ZH PDF) |
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2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with
Protector and Optional SHA-1 Authentication
Match Net Address [55h]
This command allows the bus master to specifically
address one DS2775/DS2776 on the 1-Wire bus. Only
the addressed DS2775/DS2776 responds to any sub-
sequent function command. All other slave devices
ignore the function command and wait for a reset pulse.
This command can be used with one or more slave
devices on the bus.
Skip Net Address [CCh]
This command saves time when there is only one
DS2775/DS2776 on the bus by allowing the bus master
to issue a function command without specifying the
address of the slave. If more than one slave device is
present on the bus, a subsequent function command
can cause a data collision when all slaves transmit data
at the same time.
Search Net Address [F0h]
This command allows the bus master to use a process
of elimination to identify the 1-Wire net addresses of all
slave devices on the bus. The search process involves
the repetition of a simple three-step routine: read a bit,
read the complement of the bit, then write the desired
value of that bit. The bus master performs this simple
three-step routine on each bit location of the net
address. After one complete pass through all 64 bits,
the bus master knows the address of one device. The
remaining devices can then be identified on additional
iterations of the process. See Chapter 5 in Application
Note 937: Book of iButton Standards for a comprehen-
sive discussion of a net address search, including an
actual example.
Function Commands
After successfully completing one of the net address
commands, the bus master can access the features of
the DS2775/DS2776 with any of the function commands
described in the following paragraphs. The name of
each function is followed by the 8-bit op code for that
command in square brackets. The function commands
are summarized in Table 12. Table 13 details the
requirements for using the function commands.
Read Data [69h, XXh]
This command reads data from the DS2775/DS2776
starting at memory address XXh. The LSb of the data in
address XXh is available to be read immediately after
the MSb of the address has been entered. Because the
address is automatically incremented after the MSb of
each byte is received, the LSb of the data at address
XXh + 1 is available to be read immediately after the
MSb of the data at address XXh. If the bus master con-
tinues to read beyond address FFh, data is read start-
ing at memory address 00h and the address is auto-
matically incremented until a reset pulse occurs.
Addresses labeled Reserved in the Memory Map con-
tain undefined data values (see Table 9). The Read
Data command can be terminated by the bus master
with a reset pulse at any bit boundary. Reads from EEP-
ROM block addresses return the data in the shadow
RAM. A Recall Data command is required to transfer
data from the EEPROM to the shadow. See the Memory
section for more details.
Write Data [6Ch, XXh]
This command writes data to the DS2775/DS2776 start-
ing at memory address XXh. The LSb of the data to be
stored at address XXh can be written immediately after
the MSb of the address has been entered. Because the
address is automatically incremented after the MSb of
each byte is written, the LSb to be stored at address
XXh + 1 can be written immediately after the MSb to be
stored at address XXh. If the bus master continues to
write beyond address FFh, the data starting at address
00 is overwritten. Writes to read-only addresses,
reserved addresses, and locked EEPROM blocks are
ignored. Incomplete bytes are not written. Writes to
unlocked EEPROM block addresses modify the shadow
RAM. A Copy Data command is required to transfer
data from the shadow to the EEPROM. See the Memory
section for more details.
Copy Data [48h, XXh]
This command copies the contents of the EEPROM
shadow RAM to EEPROM cells for the EEPROM block
containing address XXh. Copy Data commands that
address locked blocks are ignored. While the Copy
Data command is executing, the EEC bit in the EEPROM
register is set to 1 and writes to EEPROM addresses are
ignored. Reads and writes to non-EEPROM addresses
can still occur while the copy is in progress. The Copy
Data command takes t EEC time to execute, starting on
the next falling edge after the address is transmitted.
See Figure 27 for more information.
Recall Data [B8h, XXh]
This command recalls the contents of the EEPROM
cells to the EEPROM shadow memory for the EEPROM
block containing address XXh.
Lock [6Ah, XXh]
This command locks (write protects) the block of
EEPROM memory containing memory address XXh.
The LOCK bit in the EEPROM register must be set to 1
before the Lock command is executed. To help pre-
vent unintentional locks, one must issue the Lock com-
mand immediately after setting the LOCK bit (EEPROM
______________________________________________________________________________________
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS2775G+ | 功能描述:电池管理 2-Cell Stand-Alone Li+ Fuel-Gauge RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2775G+T&R | 制造商:Maxim Integrated Products 功能描述: 制造商:Maxim Integrated Products 功能描述:2S FG PROT 1W 14L 3X5 TDFN T&R - Tape and Reel 制造商:Maxim Integrated Products 功能描述:IC FUEL GAUGE LI+ 2CELL 14-TDFN 制造商:Maxim Integrated Products 功能描述:Battery Management 2-Cell Stand-Alone Li+ Fuel-Gauge |
| DS2775G+T&R | 功能描述:电池管理 2-Cell Stand-Alone Li+ Fuel-Gauge RoHS:否 制造商:Texas Instruments 电池类型:Li-Ion 输出电压:5 V 输出电流:4.5 A 工作电源电压:3.9 V to 17 V 最大工作温度:+ 85 C 最小工作温度:- 40 C 封装 / 箱体:VQFN-24 封装:Reel |
| DS2775G+TR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication |
| DS2775GR | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:2-Cell, Stand-Alone, Li+ Fuel-Gauge IC with Protector and Optional SHA-1 Authentication |
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