33989 datasheet(55/66 Pages) FREESCALE

Il numero della parte	33989

Spiegazioni elettronici	System Basis Chip with High-Speed CAN Transceiver

PDF	66 Pages

Scroll/Zoom	100%

Produttore elettronici	FREESCALE [Freescale Semiconductor, Inc]

Homepage	http://www.freescale.com

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33989

TYPICAL APPLICATIONS

SUPPLEMENTAL APPLICATION NOTES

How to Enter in Normal Mode After a Power-Up

Figure 47. Normal Mode After Power-Up

How to Change CAN Slew Rate

Figure 48. Change CAN Slew Rate

How to Set the CAN Interface in Sleep Mode

How to Control HS1 Output

Figure 49. HS1 Output Control

• read LX wake-up flag

• Write watchdog

X is the period of the watchdog ex:$00 for 10 ms

• Clear V2low, Vsuplow flags

• Clear Batfail, Gfail,Wdrst flags

• read CAN/WU flag

ALL FLAGS ARE READ

• Write watchdog

X is the period of the watchdog ex $00 for 10 ms

note:this register has to be refreshed before the end of the watchdog

period

Power-up

Reset

Normal request

Normal

Read IOR ($60)

Read MCR ($00)

Read CAN ($40)

Write TIM1= $BX

Read WUR ($80)

Write TIM1 =$BX

• X is the slew rate.(ex:$56 for slew rate 3).

note: default slew rate is slew rate 0 (the minus one).

Write CAN =$5X

CAN TX_RX

slew rate X

• Can go to sleep and wake-up enable

• Can go to sleep and wake-up disable

CAN

in normal

CAN in Sleep

Write CAN =$51

Write CAN =$53

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