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TMP451-Q1: ALERT引脚拉低的条件

Part Number: TMP451-Q1
Other Parts Discussed in Thread: TMP451

hi TI expert

请问,怎么模拟TMP451-Q1的alert pin 拉低呢?我现在将以下寄存器做修改,企图让tmp451-Q1 检测 过温limit,将alert 引脚拉低

local_high_lmt(r:0x05/w:0x0B):0x9E
remote_high_lmt(r:0x07/w:0x0D):0xA3
remote_therm_lmt(r:0x19/w:0x19):0xAD
local_therm_lmt(r:0x20/w:0x20):0xA3
TMP451的阈值改低(具体方法就是往这个remote_high_lmt里写入0x50),alert pin就周期性拉低一小会就拉回来了,如下图所示:
 ,请问是什么原因呢,还有什么寄存器需要我操作,谢谢。