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| 型號(hào)： | BQ2083 |
| 英文描述： | Silicon Bridge Rectifiers |
| 中文描述： | 銀紫荊星章符合電量監(jiān)測計(jì)芯片的使用與BQ29311 |
| 文件頁數(shù)： | 22/54頁 |
| 文件大?。?/td> | 461K |
| 代理商： | BQ2083 |
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SLUS573 JULY 2003
www.ti.com
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Read Word
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Block Read
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S
Battery Address
0001011
0
Command Code
Data Byte Low
PEC
Data Byte High
P
8
8
8
8
1
7
1
S
Battery Address
0001011
0
Command Code
Battery Address
7
8
1
7
1
S
1
A
1
1
1
P
S
Battery Address
0001011
0
Command Code
Battery Address
7
8
1
7
1
S
1
A
1
A
A
1
1
A
P
1
1
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Host Processor
Write Word
A ACKNOWLEDGE
A NOT ACKNOWLEDGE
S START
P STOP
Figure 7. SMBus Communication Protocol With PEC
A
bq2083
PEC Calculation
The basis of the PEC calculation is an 8-bit cyclic redundancy check (CRC-8) based on the polynomial
C(X) = X8 + X2 + X1 + 1. The PEC calculation includes all bytes in the transmission, including address, command,
and data. The PEC calculation does not include ACKNOWLEDGE, NOT ACKNOWLEDGE, start, stop, and
repeated start bits.
For example, the host requests RemainingCapacity( ) from the bq2083V1P2. This includes the host following the
read word protocol. The bq2083V1P2 calculates the PEC based on the following 5 bytes of data, assuming the
remaining capacity of the battery is 1001 mAh.
Battery Address with R/W = 0: 0x16
Command Code for RemainingCapacity( ): 0x0f
Battery Address with R/W = 1: 0x17
RemainingCapacity( ): 0x03e9
For 0x160f17e903, the bq2083V1P2 transmits a PEC of 0xe8 to the host.
PEC Enable in Master Mode
PEC for master mode broadcasts to the charger, host, or both can be enabled/disabled with the combination of the
bits hpe and cpe in
Pack Configuration
DF 0x28.
SMBus On and Off State
The bq2083V1P2 detects whether the SMBus enters the Off State by monitoring the SMBC and SMBD lines. When
both signals are continually low for at least 2.0 s, the bq2083V1P2 detects the Off State. When the SMBC and SMBD
lines go high, the bq2083V1P2 detects the On State and can begin communication within 1 ms. One-M
pulldown
resistors on SMBC and SMBD are recommended for reliable Off
State detection.
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BQ20832DBT | 制造商:Texas Instruments 功能描述: |
| BQ20832DBTR | 制造商:Texas Instruments 功能描述: |
| BQ2083DBT | 功能描述:電池管理 SBS-Cmplnt Gas Gauge for Use w/BQ29311 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| BQ2083DBTG4 | 功能描述:電池管理 SBS-Cmplnt Gas Gauge for Use w/BQ29311 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
| BQ2083DBTR | 功能描述:電池管理 SBS-Cmplnt Gas Gauge for Use w/BQ29311 RoHS:否 制造商:Texas Instruments 電池類型:Li-Ion 輸出電壓:5 V 輸出電流:4.5 A 工作電源電壓:3.9 V to 17 V 最大工作溫度:+ 85 C 最小工作溫度:- 40 C 封裝 / 箱體:VQFN-24 封裝:Reel |
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