33989 datasheet(56/66 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33989

TYPICAL APPLICATIONS

SUPPLEMENTAL APPLICATION NOTES

How to Configure Wake-Up Before Going in Low Power

Mode

Figure 50. Wake-Up Configure Before Low Power Mode

Enable CAN Wake-Up

Figure 51. Enable CAN Wake-Up

Enable Wake-Up From LX, No Cyclic Function

Figure 52. Enable Wake-Up From LX without Cyclic Sense

Enable Wake-Up From LX, with Cyclic Sense Function

Figure 53. Enable Wake-Up From LX with Cyclic Sense

Force Wake-Up

Figure 54. Force Wake-Up

Disable all Wake-Up

Figure 55. Disable all Wake-Up

• Turn on HS1

• Turn off HS1

Write IOR= $74

Write IOR= $70

• CAN sleep and CAN wake-up enable

note: CAN interface will enter sleep mode as soon as this command is sent in

Write CAN= $51

• no force wake-up, no cyclic sense, no LX cyclic

• Wake-up levels on LX

refer to the specification for details

Write LPC =$D0

Write WUR= $9X

• No force wake-up, cyclic sense function, LX cyclic

• Cyclic sense period

• Wake-up levels on LX

Write LPC =$D9

Write TIM2= $BX

Write WUR =$9X

Write LPC= $D4

Write TIM2= $BX

• Force wake-up, no cyclic sense function, LX cyclic

• Force wake-up period

• Disable Force wake-up,LX cyclic

• Disable LX

• CAN sleep and CAN wake-up disable

note: can interface will enter sle ep mode as soon as $53 is sent

Write LPC =$D0

Write WUR =$90

Write CAN =$53

33989 Datasheet(PDF) 56 Page - Freescale Semiconductor, Inc

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