Electronic Components Datasheet Search
  New Zealand  ▼
ALLDATASHEET.CO.NZ

X  

Preview PDF HTML

L9679P Datasheet(PDF) 184 Page - STMicroelectronics

Part # L9679P
Description  Automotive advanced airbag for mid/high end applications and cut-off battery IC
PDF  279 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  STMICROELECTRONICS [STMicroelectronics]
Direct Link  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

L9679P Datasheet(HTML) 184 Page - STMicroelectronics

Back Button L9679P Datasheet HTML 180Page - STMicroelectronics L9679P Datasheet HTML 181Page - STMicroelectronics L9679P Datasheet HTML 182Page - STMicroelectronics L9679P Datasheet HTML 183Page - STMicroelectronics L9679P Datasheet HTML 184Page - STMicroelectronics L9679P Datasheet HTML 185Page - STMicroelectronics L9679P Datasheet HTML 186Page - STMicroelectronics L9679P Datasheet HTML 187Page - STMicroelectronics L9679P Datasheet HTML 188Page - STMicroelectronics Next Button
Zoom Inzoom in Zoom Outzoom out
 184 / 279 page
background image
Watchdog timers
L9679P
184/279
DS11627 Rev 7
10.2
Algorithmic watchdog (WD2)
The algorithmic watchdog (WD2) is intended to protect higher software layers, and as such
requires servicing at a much slower rate and allows for software jitter as compared with
WD1. Additionally, WD2 is not implemented as a window watchdog, but is a maximum-time
watchdog, where refresh is accepted at any time before the timer expires.
The overall WD2 functionality is described in the following state diagram:
Figure 46. Algorithmic watchdog timer flow diagram
WD2INIT
WSM_RESET (From any state) /
WD2_LOCKOUT=1
WD2_WDR=0
WD2_Retry=0
WD2_ERRcnt=0
WD2_TM=0
SEED = $F0
PREV_KEY= $0D
WD2_ERR_TH_WE=1
WD2_RETRY_TH_WE=1
INITSEED
WD2 RUN
TMR2>MAX
SPI_WD2_KEY=targkey /
TMR2=0
SEED=SEEDCTR
targkey=fn(SEED,PREV_KEY)
WD2_WDR=0
WD2_LOCKOUT=0
WD2_retry=0
WD2_ERR_TH_WE=0
WD2_RETRY_TH_WE=0
TMR2>MAX /
TMR2=0
WD2_Retry++
SPI_WD2_KEY=targkey /
TMR2=0
SEED=SEEDCTR
targkey=
fn(SEED,PREV_KEY)
SPI_WD2_KEY=targkey /
TMR2=0
SEED=SEEDCTR
targkey=fn(SEED,PREV_KEY)
WD2 QUAL
TMR2>MAX /
TMR2=0
WD2_Retry++
SPI_WD2_KEY=targkey /
TMR2=0
SEED=SEEDCTR
targkey=fn(SEED,PREV_KEY)
WD2 LOCK
WD2_Retry>WD2_RETRY_TH /
WD2_ERRcnt++
WD2_LOCKOUT=1
SPI_WD2_KEY=targkey /
TMR2=0
SEED=SEEDCTR
targkey=fn(SEED,PREV_KEY)
SPI_WD2_RECOVER /
WD2_retry=0
WD2_LOCKOUT=0
WD2 RESET
TMR2>MAX /
TWDT2_RST /
WD2_WDR=1
WD2_TM=0
(MCU_SSMRST OR WD1_RESET) AND (NOT(WD2 STOPPING OR WD2 STOP) /
WD2_TM=0
SEED = $F0
PREV_KEY= $0D
WD2
OVERRIDE
SPI WD2_TEST /
WD2_LOCKOUT=0
WD2 TEST
SPI WD2_TEST /
WD2_TM=1
TMR2>MAX /
WD2
STOPPING
WD2_ERRcnt>WD2_ERR_TH
WD2_WDR=1
WD2 STOP
TWDT2_RST /
SPI_WD2_KEY=targkey /
TMR2=0
SEED=SEEDCTR
targkey=
fn(SEED,PREV_KEY)
GAPGPS02287



Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100  ...More


Datasheet Download

Go To PDF Page


Link URL



Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Contact us   |   Privacy Policy   |   Link to Datasheet    |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com