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BQ25896,充电电流只有80mA左右,没有充电

00 ------>0x48 
01  ------>0x6
02  ------>0x11
03 ------>0x1a
04 ------>0x7
05 ------>0x11
06 ------>0x82
07 ------>0x9f
08 ------>0x9f
09 ------>0x44
A ------>0x73
B ------>0x46
C ------>0x0
D ------>0x13
E ------>0x54
F ------>0x57
10 ------>0x3e
11 ------>0x98
12 ------>0x0
13------>0x8
14 ------>0x46上面为打印出来的寄存器值,0x12寄存器,是0,数据手册上写的这个,出现这个的原因是什么,
This register returns 0000000 for VBAT < VBATSHORT