33989 datasheet(44/66 Pages) FREESCALE

44 / 66 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33989

TYPICAL APPLICATIONS

SUPPLEMENTAL APPLICATION NOTES

Figure 29. Lx Wake-Up

CAN Wake-Up

The case below describes the signal for CAN wake-up.

Refer to page 49 for more details on CAN wake-up signals

and the TCAN analysis.

Figure 30. CAN Wake-Up

•TCAN

: refer to page 49 for more details.

• T1: Third pulse on CAN to INT pulse: typ 80 µs.

• The total time is 113 µs in this case.

CS Wake-Up

The figure below describes the wake up from a CS signal

transition, while the SBC is in stop mode.

Figure 31. CS Wake-Up

•T1: CS rising edge to INT pulse: typ 60 µs.

• The total time is 133 µs in this case.

Overcurrent Wake-Up

The following figure describes the signal when an

overcurrent is detected at VDD1. A VDD1 overcurrent condition

will lead to a wake-up from stop mode.

INT

SBC ready to accept SPI command.

Wake-up signalled to MCU.

tINT + tS-1STSPI (33µs max)

CAN

INT

SBC ready to accept SPI command.

Wake-up signalled to MCU.

tCAN

INT

SBC ready to accept SPI command.

Wake-up signalled to MCU.

tINT + tS-1STSPI (33µs max)

33989 Datasheet(PDF) 44 Page - Freescale Semiconductor, Inc