UJA1061TW PHILIPS [NXP Semiconductors], UJA1061TW Datasheet - Page 18

• Manufacturer Part Number: UJA1061TW
• Description: Low speed CAN/LIN system basis chip
• Manufacturer: PHILIPS [NXP Semiconductors]

Philips Semiconductors
In order to prevent a continuously running microcontroller,
the UJA1061 also detects HIGH-level clamping at
pin RSTN. If the HIGH-level remains on the pin for more
than 128 ms while pin RSTN is driven internally to a LOW
level by the UJA1061, the UJA1061 falls back immediately
to Fail-safe mode since the microcontroller cannot be reset
any more. By entering Fail-safe mode, the V1 voltage
regulator shuts down and the microcontroller stops.
2004 Mar 22
handbook, full pagewidth
Low speed CAN/LIN system basis chip
V RSTN
V1
power-up
V RV1
t RSTL
voltage
under-
Fig.7 Reset pin behaviour.
t RSTL
watchdog
missing
access
t RSTL
18
Additionally, chattering reset signals are handled by the
UJA1061 in such a way that the system safely falls back to
Fail-safe mode with lowest power consumption. Externally
applied reset signals force a mode change of the UJA1061
only within Normal, Standby and Flash mode. Within
Start-up, Restart and Fail-safe mode, any externally
applied reset signals are only monitored by the UJA1061
for clamping situations. In this way, no deadlock of the
system is possible in the case of the reset line being
affected by external disturbances.
voltage
under-
spike
power-
down
V UH : release level
V UL : detection level
V RV2
Objective specification
MCE628
time
time
UJA1061