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L9788 Datasheet(PDF) 246 Page - STMicroelectronics

Part # L9788
Description  Multifunction IC for automotive engine management system
PDF  264 Pages
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Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9788 Datasheet(HTML) 246 Page - STMicroelectronics

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Device behavior
L9788
246/264
DS12308 Rev 4
Figure 96. Power up with WK_IN and power down with WK_IN in not permanent battery condition
Figure 97. Power up with WK_IN and power down with WK_IN in permanent battery condition
t
not permanent battery
wk_Tfilter
Td_uv_rst
Vuv_vpre
Vuv_vdd5
Tuv_filter_vdd5
Tuv_filter_vpre
t
not permanent battery
Note*: Power On Reset is activated at the end of power down sequence
without waiting for V
UV_VB_CP_OFF
Vuv_vpre
Vuv_vdd5
Tuv_filter_vdd5
Tuv_filter_vpre
WK_IN_RST(MSC)
KEY_IN_DET
WK_IN
WK_IN_DET
WAKE_UP_EOT_DET
WAKE_UP_CAN_DET
PHOLD
MRD out
VB_IN
Power On Reset
VPRE
VDD5
VTRK
RSTN
V
UV_VB_CP_OFF
V
UV_VB_IN
KEY_IN_DET
WK_IN
WK_IN_DET
WAKE_UP_EOT_DET
WAKE_UP_CAN_DET
PHOLD
MRD out
VB_IN
Power On Reset
VPRE
VDD5
VTRK
RSTN
don’t’ care
GADG1512161218PS
SCENARIO 7 - POWER UP by WK_IN detection
SCENARIO 8 - POWER DOWN during WK_IN detection
GADG1512161223PS
t
wk_Tfilter
Td_uv_rst
Vuv_vpre
Vuv_vdd5
Tuv_filter_vdd5
Tuv_filter_vpre
t
Permanent battery
Vuv_vpre
Vuv_vdd5
Tuv_filter_vdd5
Tuv_filter_vpre
WK_IN_RST (MSC)
OFF
OFF
KEY_IN_DET
WK_IN
WK_IN_DET
WAKE_UP_EOT_DET
WAKE_UP_CAN_DET
PHOLD
MRD out
VB_IN
Power On Reset
VPRE
VDD5
VTRK
RSTN
KEY_IN_DET
WK_IN
WK_IN_DET
WAKE_UP_EOT_DET
WAKE_UP_CAN_DET
PHOLD
MRD out
VB_IN
Power On Reset
VPRE
VDD5
VTRK
RSTN
Don’t’ care
Permanent battery
SCENARIO 22 - POWER UP by WK_IN detection
SCENARIO 23 - POWER DOWN during WK_IN detection



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