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STLED325 bảng dữ liệu(PDF) 16 Page - STMicroelectronics

tên linh kiện STLED325
Giải thích chi tiết về linh kiện  Standby power management to host
PDF  62 Pages
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nhà sản xuất  STMICROELECTRONICS [STMicroelectronics]
Trang chủ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

STLED325 bảng dữ liệu(HTML) 16 Page - STMicroelectronics

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Functional description
STLED325
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Doc ID 17576 Rev 1
Figure 5.
Power-up condition
Note:
1
Guard timer is turned off by default upon READY assertion.
2
If Guard timer is to be kept on during READY high condition, the guard timer registers must
be set accordingly by proper commands through I2C bus.
3
In this power-up condition, Guard timer is triggered by internal POR pulse.
4
During power-up, the Guard timer value is 10s.
VCC to STLED325I
Internal POR
STBY
READY
MUTE
Guard timer counts up to 10s
1a) Power-up condition (normal behavior )
VCC to STLED325I
Internal POR
STBY
READY
MUTE
Guard timer counts up to 10s
1b) Power-up condition (processor not responding )
Count over
Due to abnormality in the processor, READY did not
change state from low to high, leading to STBY
assertion
READY asserts within 10s which is the desired
behavior, processor is active and not hung
READY continues to remain low/high



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