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L9800 датащи(PDF) 21 Page - STMicroelectronics

номер детали L9800
подробное описание детали  Automotive 8-channel LS driver
PDF  55 Pages
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производитель  STMICROELECTRONICS [STMicroelectronics]
домашняя страница  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9800 датащи(HTML) 21 Page - STMicroelectronics

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Figure 13. Transition time diagram
Limp-home mode
Sleep mode
Idle mode
tIDLE2SLEEP
tACTIVE2SLEEP
tSLEEP2IDLE
tIDLE2ACTIVE
tACTIVE2IDLE
t
LH2ACTIVE
tACTIVE2LH
tLH2SLEEP
tSLEEP2LH
Active mode
6.1.7
Reset
The following four conditions reset the SPI register (r/w) to the default value:
1. VDDIO is not present or below the minimum value of VDDIO(UV)
2. IDLE pin is set to “low” with both INn “low"
3. A reset command (CFG_1.RST set to “1”) is executed
4. NRES pin asserted
DIAG_OVC_OVT bits are not cleared by a reset command (for functional safety).
STA_1.VDDIO_UV and STA_1.VBATT_UV bits are not cleared by a reset command (for functional safety).
In particular, all channels are switched OFF (if there are no input pin set to “high”) and the input mapping
configuration is reset.
6.1.8
Undervoltage on VBATT
If the device is operative and the supply voltage drops below VBATT(UV_L), the logic sets the bit
STA_1.VBATT_UV to “1”. As soon as the supply voltage VBATT is above VBATT(UV_H), the bit STA_1.VBATT_UV
is set back to “0” after the first clear on read.
Undervoltage condition on VBATT may influence the status of the channels according to VS_UV_MASK bit
status, as described in the Table 18.
L9800
Power supply
DS14041 - Rev 2
page 21/55



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