BQ40Z50进入不了SLEEP状态，求解！

BQ40Z50进入不了SLEEP状态，求解！SLEEP已经勾选，断掉外部通讯后，不能进入SLEEP.

勾选IN_SYSTEM_SLEEP,断开通讯后。才能进入休眠。、

在不断开通讯的情况下如果需要进入sleep mode需要使能 IN_SYSTEM_SLEEP. 请参考http://www.ti.com.cn/cn/lit/ug/sluua43a/sluua43a.pdf P43.

PRES接输出地，打开Settings；DA  confjguration  ;SLEEP,断开通讯后，电流为0，但是不能进入SLEEP.自耗电流一直300uA.是什么情况

BQ40Z50进入sleep模式，跟SMBus状态有关，详细条件如下：

SMBus low for Bus Timeout(1) if
[IN_SYSTEM_SLEEP] = 0, or no communication
for Bus Timeout if [IN_SYSTEM_SLEEP] = 1
AND
DA Config[SLEEP] = 1(1) AND
|Current()| ≤ Sleep Current AND
Voltage Time > 0 AND
(OperationStatus()[PRES] = 0 OR
DA Config[NR] = 1) AND
OperationStatus()[SDM] = 0 AND
No PFAlert() bits set AND(2)
No PFStatus() bits set AND
No SafetyAlert() bits set AND(2)
No [AOLD], [AOLDL], [ASCC], [ASCCL], [ASCD],
[ASCDL] set in SafetyStatus()