AMIS-30421 Datasheet, PDF (10/41 Pages) ON Semiconductor – Micro-Stepping Stepper Motor Bridge Controller

AMIS−30421
VBB
V_DD
t_PU
VDDH
VDDL
POR
Internal signal
t
≤t_RF
t
t
V_WDb
t_POR
t_POR
t
<WDEN>
t_DSPI
Enable Watchdog
> t_WDPR
and t_WDTO
Write ‘1’ to <WDEN>
ÏÏÏÉÉÉ_{≤ tWDPR or ≥ tWDTO}
t_WDRD
t
WD Timer
t WDTO
Internal signal
t WDPR
ÏÏÉÉ
Remarks:
t
−WDb−pin pulled up to V_DD
−t_WDTO = <WDT[3:0]>
−<WDEN> and <WDT[3:0]> are SPI bits
Figure 4. Power−On−Reset Timing Diagram
VBB
V BBOH
VBBOL
V BBUH
V BBUL
Figure 5. Under− and Overvoltage
t
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