Datasheet

TJA1085 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2012. All rights reserved.
Product data sheet Rev. 1 — 23 October 2012 25 of 61
NXP Semiconductors
TJA1085
FlexRay active star coupler
6.10.2.3 Interrupt Status register
The Interrupt Status register is read-only. When the TJA1085 sets a bit in this register, it
triggers a falling edge on pin INTN. Bits PWON, WU, SPI_ERROR and HC_ERROR are
reset after a successful read operation. The remaining bits are reset after the flag (or
flags) that triggered the interrupt has been reset and a successful read operation has
been performed (see Section 6.7
).
Table 9. Interrupt status register
Bit Symbol Description
11 PWON power-on detection:
0: no power-on detected
1: power-on detected
10 WU wake-up event detection (any):
0: no wake-up event detected
1: wake-up event detected
9 EVENT_BR1 wake-up or bus error detection on branch 1:
0: no wake-up or bus error detected
1: wake-up or bus error detected
8 EVENT_BR2 wake-up or bus error detection on branch 2:
0: no wake-up or bus error detected
1: wake-up or bus error detected
7 EVENT_BR3 wake-up or bus error detection on branch 3:
0: no wake-up or bus error detected
1: wake-up or bus error detected
6 EVENT_BR4 wake-up or bus error detection on branch 4:
0: no wake-up or bus error detected
1: wake-up or bus error detected
5 UV_ERROR undervoltage detected on V
BAT
, V
CC
or V
IO
:
0: no undervoltage detected
1: undervoltage detected
4 CLAMP_ERROR clamp error on TRXD, TXEN or branch or collision on TRXD:
0: no clamping error detected
1: clamping error detected
3 SPI_ERROR SPI communication error:
0: not detected
1: detected
2 HC_ERROR host command error:
0: not detected
1: detected
1 TEMP_ERROR overtemperature error:
0: not detected
1:detected
0 PARITY parity bit - odd parity (including parity bit)