BQ27546-G1: BQ27546-G1 i2c地址改变问题-TI中文支持网

Part Number:BQ27546-G1Other Parts Discussed in Thread:BQSTUDIO,

问题概述：

第一种：约百分之三的概率进入0x0b地址状态，无法正常使用电量计功能，一般断开电池后重新通电可会恢复到正常的0x55（7位i2c地址）地址状态。

第二种情况：千分之四左右的芯片一直在0x0b状态，需要使用bqStudio烧录srec文件才能恢复正常。BQ27546配置文件.zip

芯片型号：BQ27546-G1

订单编号：T03997026

使用环境

配套电池：松下NCR18650B 3400mAh

与主控通信速率：100kHz

I2C总线下还挂了另外两个芯片

附件压塑包附上了我们量产用的文件，烧录配置的命令如下：

bqtool –bqfs-flash –bqfs-file=0546_2_01-bq27546G1.df.fs

芯片的主要配置参数（从gg.csv文件截取）：

"Configuration","Charge","Charging Voltage","4200","mV"

"Configuration","JEITA","T1-T2 Chg Voltage","4200","mV"

"Configuration","JEITA","T2-T3 Chg Voltage","4200","mV"

"Configuration","JEITA","T3-T4 Chg Voltage","4150","mV"

"Configuration","JEITA","T4-T5 Chg Voltage","4100","mV"

"Configuration","Data","Design Capacity","3400","mAh"

"Gas Gauging","State","Qmax Cell 0","3400","mAh"

"Configuration","Discharge","SOC1 Set Threshold","340","mAh"

"Configuration","Discharge","SOC1 Clear Threshold","408","mAh"

已下是读取异常I2C书出的log信息：

root@OpenWrt:~# i2cdetect -y 0

0 1 2 3 4 5 6 7 8 9 a b c d e f

00: — — — 0b — — — —

10: — — — — — — — — — — — — — — — —

20: — — — — — — — — — — — — — — — —

30: — — — — — — — — — — — — — — — —

40: — — — — — — — — — — — 4b — — — —

50: — — — — — — — — — — — — — — — —

60: — — — — 64 — — — — — — — — — — —

70: — — — — — — — —

root@OpenWrt:~#

root@OpenWrt:~#

root@OpenWrt:~# i2cdump -y 0 0x0b

No size specified (using byte-data access)

0 1 2 3 4 5 6 7 8 9 a b c d e f 0123456789abcdef

00: 6d 53 5a 89 78 03 84 99 55 c3 ea ee 94 1b 96 f2 mSZ?x???U???????

10: 0d 4a 64 5b c6 41 26 91 57 fe 11 c0 4f c0 f0 57 ?Jd[?A&?W???O??W

20: 5d 2d 44 a0 c0 8e 63 e9 90 8c 31 50 b4 03 4c 57 ]-D???c???1P??LW

30: d3 ad fd 2b b9 99 39 22 61 2a 5d 41 db 63 ac 51 ???+??9"a*]A?c?Q

40: 99 0c 64 83 40 8c 0a 05 83 d1 7b e4 10 60 6c 45 ??d?@?????{??`lE

50: 24 01 67 92 e1 90 17 60 78 f2 12 72 d1 03 e2 06 $?g????`x??r????

60: 08 32 40 8a 34 61 21 XX XX XX XX XX XX XX XX XX ?2@?4a!XXXXXXXXX

70: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX

80: 6d 53 5a 89 78 03 84 99 55 c3 ea ee 94 1b 96 f2 mSZ?x???U???????

90: 0d 4a 64 5b c6 41 26 91 57 fe 11 c0 4f c0 f0 57 ?Jd[?A&?W???O??W

a0: 5d 2d 44 a0 c0 8e 63 e9 90 8c 31 50 b4 03 4c 57 ]-D???c???1P??LW

b0: d3 ad fd 2b b9 99 39 22 61 2a 5d 41 db 63 ac 51 ???+??9"a*]A?c?Q

c0: 99 0c 64 83 40 8c 0a 05 83 d1 7b e4 10 60 6c 45 ??d?@?????{??`lE

d0: 24 01 67 92 e1 90 17 60 78 f2 12 72 d1 03 e2 06 $?g????`x??r????

e0: 08 32 40 8a 34 61 21 XX XX XX XX XX XX XX XX XX ?2@?4a!XXXXXXXXX

f0: XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XX XXXXXXXXXXXXXXXX

以下是正常状态的打印输出

root@OpenWrt:~# i2cdetect -y 0

0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f

00: — — — — — — — —

10: — — — — — — — — — — — — — — — —

20: — — — — — — — — — — — — — — — —

30: — — — — — — — — — — — — — — — —

40: — — — — — — — — — — — 4b — — — —

50: — — — — — UU — — — — — — — — — —

60: — — — — 64 — — — — — — — — — — —

70: — — — — — — — —

root@OpenWrt:~#

root@OpenWrt:~# i2cdump -f -y 0 0x55

No size specified (using byte-data access)

0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f   0123456789abcdef

00: 8c 00 00 00 5e 00 46 0c c8 0f 59 00 72 0c 3c 0d ?…^.F???Y.r?<?

10: 32 0c fc 0c 05 fe 71 01 fc 0c 00 00 fc 0c b9 11   2?????q???..????

20: 32 0c 32 0c 54 01 98 01 3f 0c 00 00 5e 00 62 00   2?2?T?????..^.b.

30: 68 10 a0 0a 33 00 e8 02 00 00 7f 29 48 0d 00 00   h???3.??..?)H?..

40: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   …………….

50: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   …………….

60: 00 00 10 00 97 00 00 00 48 0d 00 00 11 10 00 22   ..?.?…H?..??."

70: 00 00 32 0c a2 3e 00 f8 XX 8c e0 03 c6 0f 46 0c ..2??>.?X?????F?

80: 8c 00 00 00 5e 00 46 0c c8 0f 59 00 72 0c 3c 0d ?…^.F???Y.r?<?

90: 32 0c fc 0c 05 fe 71 01 fc 0c 00 00 fc 0c b9 11   2?????q???..????

a0: 32 0c 32 0c 54 01 98 01 3f 0c 00 00 5e 00 62 00   2?2?T?????..^.b.

b0: 68 10 a0 0a 33 00 e8 02 00 00 7f 29 48 0d 00 00   h???3.??..?)H?..

c0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   …………….

d0: 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00 00   …………….

e0: 00 00 10 00 97 00 00 00 48 0d 00 00 11 10 00 22   ..?.?…H?..??."

f0: 00 00 32 0c a2 3e 00 f8 XX 8c e0 03 c6 0f 46 0c ..2??>.?X?????F?

root@OpenWrt:~#

root@OpenWrt:~# cat /sys/class/power_supply/bq27546-0/uevent

POWER_SUPPLY_NAME=bq27546-0

POWER_SUPPLY_STATUS=Discharging

POWER_SUPPLY_PRESENT=1

POWER_SUPPLY_VOLTAGE_NOW=4039000

POWER_SUPPLY_CURRENT_NOW=-507000

POWER_SUPPLY_CAPACITY=94

POWER_SUPPLY_CAPACITY_LEVEL=Normal

POWER_SUPPLY_TEMP=411

POWER_SUPPLY_TIME_TO_EMPTY_NOW=22080

POWER_SUPPLY_TECHNOLOGY=Li-ion

POWER_SUPPLY_CHARGE_FULL=3324000

POWER_SUPPLY_CHARGE_NOW=3184000

POWER_SUPPLY_CHARGE_FULL_DESIGN=3400000

POWER_SUPPLY_CYCLE_COUNT=0

POWER_SUPPLY_POWER_AVG=3400000

POWER_SUPPLY_HEALTH=Good

POWER_SUPPLY_MANUFACTURER=Texas Instruments

POWER_SUPPLY_SOC1_STATUS=0

POWER_SUPPLY_SOC1_SET=340

POWER_SUPPLY_SOC1_CLEAR=408

root@OpenWrt:~#

Star Xu：

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BQ27546-G1: BQ27546-G1 i2c地址改变问题

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