Freescale SMeCm33i3c89onductor, Inc.
DEVICE DESCRIPTION
Figure 20. State Machine
PowerDown
Reset
Emergency
W/D: timeout (4) OR V1 low (1)
Reset counter (1ms)
expired AND V1 high (2)
V1 low (1)
Standby
Normal Request
MC33389 C
version (9b)
SPI:Sleep (5)
Sleep
Normal
(MC33389 A version only: V1 low > 100ms) (9) (9a)
W/D: timeout (4) OR V1 low (1)
Legend:
1: “V1 low” means V1 below reset threshold
2: “V1 high” means V1 above reset threshold
3: “W/D: Trigger” means SCWR register write operation during Normal Request mode.
4: “W/D: time out” means SWCR register not written before W/D time out period expired, or W/D written in
incorrect time window. In normal request mode time out is 75ms.
5: “SPI: Sleep” means SPI write command to MCR and MCVR registers, data sleep
6: “SPI: Normal” means SPI write command to MCR and MCVR registers, data normal
7: “SPI: Standby” means SPI write command to MCR and MCVR registers, data standby
8: “Wake up” means one of the following event occur: CAN wake up, Forced wake, Cyclic sense wake up,
Direct Lx wake up or SPI CSB wake up.
9: “V1 low > 100ms” means V1 below reset threshold for more than 100ms.
9a: This condition leads to SBC in sleep mode only for the MC33389ADW (SO28 package).
9b: V1 low for > 100ms does not lead to sleep mode for the MC33389CDW (SO28WB package) and for
the MC33389CDH (HSOP20 package).
For More Information On This Product,
MC33389
MOTOROLA
19
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