SPSB081 datasheet(94/137 Pages) STMICROELECTRONICS

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7.4

Control registers

Table 71. Control register CR1 (0x01)

Bit

name

Access

0 (R)

0 (R/W)

0 (R)

1 (R/W)

0 (R)

0 (R/W)

0 (R) 0 (R/W) 1 (R/W)

0 (R/W)

Table 72. CR1 signals description

Bit

Name

Description

RES

Reserved

RES

Reserved

WU2_PU

Wake-up Input x (WUx): configuration of internal current source

0 = Pull-down (default)

1 = Pull-up

WU1_PU

RES

Reserved

RES

Reserved

WU2_EN

Wake-up Input x (WUx) enable

0 = WUx disabled

1 = WUx enabled (default)

Note:

For WU2 the setting is only valid if input is configured as wake-up input in configuration register

(0x3F).

WU1_EN

RES

Reserved

RES

Reserved

RES

Reserved

RES

Reserved

WU2_FILT_1

WUx FILT_1, 0

00 = Wake-up inputs monitored in static mode (filter time tWU_stat) (default)

01 = Wake-up inputs monitored in cyclic mode with Timer2 (filter time: tWU_cyclic; blanking time 80% of timer

ON time)(1)

10 = Wake-up inputs monitored in cyclic mode with Timer1 (filter time: tWU_cyclic; blanking time 80% of timer

ON time)(1)

11 = Invalid setting; command is ignored, and SPI INV CMD is set

WU2_FILT_0

WU1_FILT_1

WU1_FILT_0

RES

Reserved

CAN _REC_ONLY

CAN Receive only Mode

0 = CAN Receive only mode disabled (default)

1 = CAN Receive only mode enabled (CAN Trx must be activated, see CAN_ACT bit)

CAN_ACT

CAN Transceiver activation

0 = CAN Trx low power mode (default)

SPSB081

Control registers

DS14048 - Rev 3

page 94/137

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