TJA1029 Просмотр технического описания (PDF) - NXP Semiconductors.

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TJA1029

LIN 2.2A/SAE J2602 transceiver with TXD dominant timeout

NXP Semiconductors. 

NXP Semiconductors

TJA1029

LIN 2.2A/SAE J2602 transceiver with TXD dominant timeout

Reset

RXD: floating

Transmitter: off

falling VBAT < Vth(POR)L

Normal

RXD: data output

Transmitter: on(1)

rising VBAT > Vth(POR)H

t(SLP_N = 1) > tgotonorm

t(SLP_N = 0) > tgotosleep

t(SLP_N = 1) > tgotonorm

Sleep

RXD: floating

Transmitter: off

Standby

RXD: low

Transmitter: off

t(LIN = 0→1; after LIN = 0) > twake(dom)LIN

015aaa215

(1) A positive edge on SLP_N triggers a transition to Normal mode. The transmitter is enabled when

TXD goes HIGH. In the event of thermal shutdown, the transmitter is disabled.

Fig 3. State diagram

Table 4.

Mode

Reset

Operating modes

SLP_N RXD

x

floating

Transmitter

off

Sleep[1]

0

Standby[2] 0

Normal 1

floating

off

LOW[3]

off

HIGH: recessive state Normal mode[4]

LOW: dominant state

Description

all inputs ignored; all outputs

drivers off

no wake-up request detected

wake-up request detected

bus signal shaping enabled

[1] The TJA1029 enters Sleep mode after a power-on reset (e.g. after switching on VBAT).

[2] The TJA1029 switches automatically to Standby mode when a LIN wake-up event occurs in Sleep mode.

[3] The wake-up interrupt (on pin RXD) is released after a positive edge on pin SLP_N.

[4] A positive edge on SLP_N triggers a transition to Normal mode. The transmitter will be off if TXD is LOW

and will be enabled as soon as TXD goes HIGH.

TJA1029

Product data sheet

All information provided in this document is subject to legal disclaimers.

Rev. 1 — 8 January 2013

© NXP B.V. 2013. All rights reserved.

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