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L9908 データシート(PDF) 38 Page - STMicroelectronics

部品番号 L9908
部品情報  Automotive 3-Phase motor gate driver unit
PDF  152 Pages
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メーカー  STMICROELECTRONICS [STMicroelectronics]
ホームページ  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9908 データシート(HTML) 38 Page - STMicroelectronics

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Figure 18. Auto-retry faults - Permanent fault timing diagram
5.6.2.3
Reduced operation faults
When a reduced operation fault is detected the related SPI flag is set to ‘1’, the IC ERR bits in SPI FRAME are set
to ‘11’ and the FS_FLAG is asserted low.
Disable logic reacts forcing the failing half bridge only in a disable mode so that VGHS_n-VSHS_n = 0 V and
VGLS_n-VSLSn = 0 V [n → failing HB] (SPI configuration bit HBn_DIS remains set as previously configured).
Safe condition is left when all the following conditions are met in the following sequence:
1. Reduced Operation fault is removed;
2. Reduced Operation fault flag is cleared on read (action required by Application SW);
3. SPI bit HBn_ACK [n = 1,2,3] is set ‘0’ and then set back to ‘1’ (action required by Application SW).
Note:
Since HBn_ACK is a Safety Latent Register (SLR) it is required to access correctly the CONFIG MODE in order
to conclude correctly the recovery flow.
L9908
Functional description
DS13546 - Rev 5
page 38/152



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