TJA1041A 데이터 시트보기 (PDF) - NXP Semiconductors.

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TJA1041A

High-speed CAN transceiver

NXP Semiconductors. 

NXP Semiconductors

TJA1041A

High-speed CAN transceiver

7.1 Operating modes

The TJA1041A can be operated in five modes, each with specific features. Control

pins STB and EN select the operating mode. Changing between modes also gives access

to a number of diagnostics flags, available via pin ERR. The following sections describe

the five operating modes. Table 4 shows the conditions for selecting these modes.

Figure 3 illustrates the mode transitions when VCC, VI/O and VBAT are present.

Table 4. Operating mode selection

Control pins Internal flags

Operating mode

Pin INH

STB EN

UVNOM UVBAT

pwon;

wake-up

X

X

set

X

X[1]

Sleep mode[2]

floating

cleared set

one or both set Standby mode

H

both cleared no change from Sleep mode floating

Standby mode from any

H

other mode

L

L

cleared cleared one or both set Standby mode

H

both cleared no change from Sleep mode floating

Standby mode from any

H

other mode

L

H

cleared cleared one or both set Standby mode

H

both cleared no change from Sleep mode floating

Go-to-sleep command mode H[3]

from any other mode[3]

H

L

cleared cleared X

Pwon/Listen-only mode

H

H

H

cleared cleared X

Normal mode[4]

H

[1] Setting the pwon flag or the wake-up flag will clear the UVNOM flag.

[2] The transceiver directly enters Sleep mode and pin INH is set floating when the UVNOM flag is set (so after

the undervoltage detection time on either VCC or VI/O has elapsed before that voltage level has recovered).

[3] When Go-to-sleep command mode is selected for longer than the minimum hold time of the go-to-sleep

command, the transceiver will enter Sleep mode and pin INH is set floating.

[4] On entering Normal mode the pwon flag and the wake-up flag will be cleared.

TJA1041A_4

Product data sheet

Rev. 04 — 29 July 2008

© NXP B.V. 2008. All rights reserved.

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