- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄371415 > 27210 (Texas Instruments, Inc.) Li-Ion AND Li-Pol BATTERY GAS GAUGE IC FOR PORTABLE APPLICATIONS (bqJUNIOR) PDF資料下載
參數(shù)資料
| 型號： | 27210 |
| 廠商： | Texas Instruments, Inc. |
| 英文描述： | Li-Ion AND Li-Pol BATTERY GAS GAUGE IC FOR PORTABLE APPLICATIONS (bqJUNIOR) |
| 中文描述： | 鋰離子和鋰聚合物電池電量監(jiān)測計芯片的便攜式應(yīng)用（bqJUNIOR） |
| 文件頁數(shù)： | 26/30頁 |
| 文件大?。?/td> | 337K |
| 代理商： | 27210 |
第1頁第2頁第3頁第4頁第5頁第6頁第7頁第8頁第9頁第10頁第11頁第12頁第13頁第14頁第15頁第16頁第17頁第18頁第19頁第20頁第21頁第22頁第23頁第24頁第25頁當前第26頁第27頁第28頁第29頁第30頁
www.ti.com
Command byte
The Command byte of the bqJUNIOR consists of eight contiguous valid command bits. The command byte
contains two fields: W/R Command and address. The Command byte values are shown as follows:
Reading 16-bit Registers
Because 16-bit values are read only 8 bits at a time with the HDQ interface, it is possible that the device can
update the register value between the time the host reads the first and second bytes. To prevent any system
issues, any 16-bit values read by the host should be read with the following procedure.
1. Read high byte (H0).
2. Read low byte (L0).
3. Read high byte (H1).
4. If H1=H0, then valid result is H0, L0.
5. Otherwise, read low byte (L1) and valid result is H1, L1.
bq27010, bq27210
SLUS707B–APRIL 2006–REVISED JANUARY 2007
The communication protocol is asynchronous return-to-one and is referenced to V
SS
. Command and data bytes
consist of a stream of eight bits that have a maximum transmission rate of 5 Kbits/s. The least-significant bit of a
command or data byte is transmitted first. Data input from the bqJUNIOR can be sampled using the pulse-width
capture timers available on some microcontrollers. A UART can also be configured to communicate with the
bq27010.
If a communication timeout occurs (for example, if the host waits longer than T
(RSPS)
for the bq27010 to respond)
or if this is the first access command, then a BREAK should be sent by the host. The host may then resend the
command. The bq27010 detects a BREAK when the HDQ pin is driven to a logic-low state for a time T
or
greater. The HDQ pin then returns to its normal ready-high logic state for a time T
(BR)
.The bq27010 is then ready
for a command from the host processor.
The return-to-one data-bit frame consists of three distinct sections:
1. The first section starts the transmission by either the host or the bq27010 taking the HDQ pin to a
logic-low state for a period equal to T
(HW1)
or T
(DW1)
.
2. The next section is the actual data transmission, where the data should be valid for T
(HW0)
- T
(HW1)
or
T
(DW0)
- T
(DW1)
.
3. The final section stops the transmission by returning the HDQ pin to a logic-high state and holding it high
until the time from bit start to bit end is equal to T
(CYCH)
or T
(CYCD)
.
The HDQ line can remain high for an indefinite period of time between each bit of address or between each bit
of data on a write cycle. After the last bit of address is sent on a read cycle, the bq27010 starts outputting the
data after T
with timing as specified. The serial communication timing specification and illustration sections
give the timings for data and break communication. Communication with the bq27010 always occurs with the
least-significant bit being transmitted first.
Plugging in the battery pack can be seen as the start of a communication due to contact bounce. It is
recommended that each communication or string of communications be preceded by a break to reset the HDQ
engine.
7
6
5
4
3
2
1
0
W/R
AD6
AD5
AD4
AD3
AD2
AD1
AD0
W/R
Indicates whether the command bytes is a read or write command. A
1
indicates a write command
and that the following eight bits should be written to the register specified by the address field of
the Command byte, whereas a
0
indicates that the command is a read. On a read command, the
bqJUNIOR outputs the requested register contents specified by the address field portion of the
Command byte.
AD6-AD0
The seven bits labeled AD6—AD0 containing the address portion of the register to be accessed.
This procedure assumes that the 3 or 4 reads are made more quickly than the update rate of the value. The
maximum update rate of any value in the bq27010/bq27210 is 1.28 seconds.
The bq27210 circumvents this issue if a 16-bit value is read using the I
2
C incremental read procedure. Both low
and high bytes are captured simultaneously when the low byte is read.
26
Submit Documentation Feedback
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| 270KD05JX | 11 to 460 Volts Varistor 0.7 to 29 Joule |
| 271KD05JX | 11 to 460 Volts Varistor 0.7 to 29 Joule |
| 270KD05NX | 4 to 460 Volts Varistor 0.20 to 22.5 Joule |
| 271KD05NX | 4 to 460 Volts Varistor 0.20 to 22.5 Joule |
| 270KD07NX | 4 to 510 Volts Varistor 0.8 to 47 Joule |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| 27-210 | 制造商:Distributed By MCM 功能描述:Chassis Mount Female Solder-On BNC Connector 制造商:MCM 功能描述:RF/COAXIAL, BNC JACK, STRAIGHT, CRIMP; Connector Type:BNC Coaxial; Body Style:Straight Jack; Coaxial Termination:Crimp; Connector Mounting:Panel; Connector Type:BNC Coaxial |
| 272-100 | 制造商: 功能描述: 制造商:undefined 功能描述: |
| 272100-11 | 制造商:Amphenol Connex 功能描述:7/16 4HOLE PNL JK .141 LOW PIM - Bulk |
| 272-100-JBW | 制造商:RCD Components Inc 功能描述:Res Wirewound 10 Ohm 5% 10W ±20ppm/°C Molded AXL Thru-Hole Bulk |
| 272101 | 功能描述:RF 連接器 7/16 PANEL JACK .250 S/R 4 HOLE RoHS:否 制造商:Bomar Interconnect 產(chǎn)品:Connectors 射頻系列:BNC 型式:Jack (Female) 極性: 觸點電鍍:Gold 阻抗: 端接類型:Solder 主體類型:Straight Bulkhead 電纜類型: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。