l9958 STMicroelectronics, l9958 Datasheet - Page 24

• Manufacturer Part Number: l9958
• Description: Low Rdson Spi Controlled H-bridge
• Manufacturer: STMicroelectronics

Diagnostics and protections
5.4
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Figure 20. Off-state diagnostic principle
H-Bridge functional status
Three bits in the diagnosis register are used to give a feedback about the state of the H-
Bridge. Status are Current Limitation (bit 4 "C_LIM"), Temperature Warning (bit 5 "T_WRN")
and Bridge Enable Status (bit 7 "ACT"). Those bits do not report a failure but only a
functional state of the H-bridge that could be useful to change the control strategy mainly in
term of power dissipation.
Doc ID 17269 Rev 1
L9958