UJA1061TW,512 NXP Semiconductors, UJA1061TW,512 Datasheet - Page 21

• Manufacturer Part Number: UJA1061TW,512
• Manufacturer: NXP Semiconductors

Specifications of UJA1061TW,512

• Number Of Transceivers: 1
• Power Down Mode: Sleep/Standby
• Operating Supply Voltage (min): 5.5V
• Operating Temperature (max): 125C
• Operating Temperature (min): -40C
• Operating Temperature Classification: Automotive
• Mounting: Surface Mount
• Lead Free Status / RoHS Status: Compliant

NXP Semiconductors
UJA1061_6
Product data sheet
6.7.1.2 On-line mode
6.7.1.3 On-line Listen mode
6.7.1.4 Off-line mode
6.7.2 CAN wake-up
6.7.3 Termination control
When leaving Active mode the CAN transmitter is disabled and the CAN receiver is
monitoring the CAN-bus for a valid wake-up. The CAN termination is then working
autonomously.
In On-line mode the CAN bus pins and RTL and RTH pins are biased to the normal levels.
The CAN transmitter is deactivated and RXDC reflects the CAN wake-up status. A CAN
wake-up event is signalled to the microcontroller by setting pin RXDC to LOW.
If the bus stays continuously dominant or recessive for the Off-line time (t
Off-line state will be entered.
On-line Listen mode behaves similar to On-line mode, but all activity on the CAN-bus, with
exception of a special global wake-up request, is ignored. The global wake-up request is
described in
Off-line mode is the low-power mode of the CAN transceiver. The CAN transceiver is
disabled to save supply current and is high-ohmic terminated to ground.
The CAN off-line time is programmable in two steps with the CAN Off-line Timer Control
(COTC) bit. When entering On-line (Listen) mode from Off-line mode the CAN off-line time
is temporarily extended to t
To wake-up the UJA1061 via CAN it has to be distinguished between a conventional
wake-up and a global wake-up in case partial networking is enabled (bit CPNC = 1).
To pass the wake-up filter for a conventional wake-up a dominant, recessive, dominant
signal on the CAN-bus is needed.
For a global wake-up out of On-line Listen mode two distinct CAN data patterns are
required (shown in hexadecimal code here):
The second pattern must be received within t
CAN-ID can be used with these data patterns.
If the CAN transceiver enters On-line Listen mode directly from Off-line mode the global
wake-up message is sufficient to wake-up the SBC. This pattern must be received within
t
global wake-up message, then both messages are required for a CAN wake-up.
In Active mode, On-line mode and On-line Listen mode, CANH is terminated to GND and
CANL is terminated to pin V2 via the external termination resistors applied to RTH and
RTL. In case of detected bus failures, the termination changes according to the ISO
11898-3 standard. In Off-line mode pin CANH stays terminated to GND but with a diode in
timeout
•
•
In the Initial message: C6EE EEEE EEEE EEEF
In the Global wake-up message: C6EE EEEE EEEE EE37
after entering On-line Listen mode. Should t
Section
All information provided in this document is subject to legal disclaimers.
6.7.2. Pin RXDC is kept HIGH.
Rev. 06 — 9 March 2010
off-line(ext)
.
Fault-tolerant CAN/LIN fail-safe system basis chip
timeout
timeout
after receiving the first pattern. Any
elapse before receiving the
UJA1061
© NXP B.V. 2010. All rights reserved.
off-line
), the
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