33742 datasheet(49/70 Pages) FREESCALE

49 / 70 page

Analog Integrated Circuit Device Data

Freescale Semiconductor

33742

FUNCTIONAL DEVICE OPERATION

LOGIC COMMANDS AND REGISTERS

RESET CONTROL REGISTER (RCR)

Tables 18

and 19 contain various Reset Control Register information.

CAN REGISTER (CAN)

Tables 20 through 23 contain the information on the CAN register. Table 20 describes control of the high-speed CAN module,

mode, slew rate, and wake-up.

Table 18. Reset Control Register

RCR

R/W

$001b

WDSTOP

NOSTOP

CAN SLEEP

RSTTH

Reset Value

–

Reset Condition

(Write)(56)

–

POR, RESET, STO2NR

POR, NR2N, NR2STB

POR

Notes

56.

See Table 13 page 47, for definitions of reset conditions.

Table 19. Reset Control Register Control Bits

Name

Logic

Description

WDSTOP

No Watchdog in Stop mode.

Watchdog runs in Stop mode.

NOSTOP

Device cannot enter Sleep mode.

Sleep mode allowed. Device can enter Sleep mode.

CAN SLEEP

CAN Sleep mode disable (despite D0 bit in CAN register).

CAN Sleep mode enabled (in addition to D0 in CAN register).

RSTTH

Reset Threshold 1 selected (typ 4.6V).

Reset Threshold 2 selected (typ 4.2V).

Table 20. CAN Register

CAN

R/W

$010b

CANCLR

SC1

SC0

MODE

CANWU

CAN-F

CAN-UF

THERM-CUR

Reset Value

–

Reset Condition

(Write)(57)

–

POR

NR2N, STB2N

Notes

57.

See Table 13, page 47, for definitions of reset conditions.

Table 21. CANCLR Control Bits

Logic

Description

No effect.

Re-enables CAN driver after TXD permanent dominant or RXD permanent recessive failure occurred. Failure

recovery conditions must occur to re-enable.

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