tja1027 NXP Semiconductors, tja1027 Datasheet - Page 6

• Manufacturer Part Number: tja1027
• Description: Lin 2.2/sae J2602 Transceiver
• Manufacturer: NXP Semiconductors

NXP Semiconductors
TJA1027
Product data sheet
Table 4.
[1]
[2]
[3]
[4]
Mode
Reset
Sleep
Standby
Normal
Fig 3.
rising V
The TJA1027 enters Sleep mode after a power-on reset (e.g. after switching on V
The TJA1027 will switch automatically to Standby mode if a LIN wake-up event occurs during Sleep mode.
The wake-up interrupt (on pin RXD) is released after a positive edge on pin SLP_N.
A positive edge on SLP_N will trigger a transition to Normal mode The transmitter will be off if TXD is LOW
and will be enabled as soon as TXD goes HIGH.
[1]
(1) A positive edge on SLP_N triggers a transition to Normal mode; the transmitter is enabled once
[2]
BAT
TXD goes HIGH; in the event of thermal shut down, the transmitter is disabled.
State diagram
Operating modes
> V
SLP_N
x
0
0
1
th(POR)H
Transmitter: off
All information provided in this document is subject to legal disclaimers.
RXD: floating
Transmitter: off
RXD: floating
Sleep
Reset
RXD
floating
floating
LOW
HIGH: recessive state
LOW: dominant state
Rev. 1 — 20 October 2011
t
(SLP_N = 1)
[3]
> t
t
(LIN = 0→1; after LIN = 0)
gotonorm
falling V
Transmitter
off
off
off
Normal mode
t
BAT
(SLP_N = 0)
< V
th(POR)L
> t
> t
wake(dom)LIN
gotosleep
[4]
Transmitter: on
RXD: data output
LIN 2.2/SAE J2602 transceiver
Normal
Description
all inputs ignored; all outputs
drivers off
no wake-up request detected
wake-up request detected
bus signal shaping enabled
(1)
t
(SLP_N = 1)
BAT
Transmitter: off
TJA1027
© NXP B.V. 2011. All rights reserved.
Standby
).
RXD: low
> t
gotonorm
015aaa215
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