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 13 of 61
NXP Semiconductors
TJA1085
FlexRay active star coupler
- from AS_Normal in response to a host ‘AS_Standby’ command (HC mode)
- from AS_Sleep in response to a host ‘AS_Standby’ command (HC mode)
- from AS_Sleep when a wake-up event is detected
The TJA1085 switches from AS_Standby:
- to AS_Normal when a wake-up event is detected, provided V
BUF
> V
uvr(VBUF)
- to AS_Normal when a V
CC
undervoltage recovery event is detected (V
CC
> V
uvr(VCC)
for longer than t
rec(uv)(VCC)
), provided V
BUF
> V
uvr(BUF)
- to AS_Normal in response to a host ‘AS_Normal’ command (HC mode)
- to AS_Sleep if the dStarGoToSleep timer expires (AP mode)
- to AS_Sleep if a V
CC
undervoltage event lasts longer than t
to(uvd)(VCC)
(HC mode)
- to AS_Sleep in response to a host ‘AS_Sleep’ command (HC mode)
6.8.1.4 AS_Sleep
A wake-up event will trigger a transition to AS_Standby (followed by a transition to
AS_Normal if V
BUF
> V
uvr(VBUF)
).
The TJA1085 switches to AS_Sleep:
- from AS_Standby in response to a host ‘AS_Sleep’ command (HC mode)
- from AS_Standby if the dStarGoToSleep timer expires (AP mode)
- from AS_Standby if a V
CC
undervoltage event lasts longer than t
to(uvd)(VCC)
(HC mode)
- from AS_Normal in response to a host ‘AS_Sleep’ command (HC mode)
- from AS_Normal if the dStarGoToSleep timer expires (AP mode)
The TJA1085 switches from AS_Sleep:
- to AS_Standby in response to a host ‘AS_Standby’ command (HC mode)
- to AS_Standby when a wake-up event is detected.
- to AS_Normal in response to a host ‘AS_Normal’ command (HC mode)
6.8.1.5 AS_Normal
The TJA1085 switches to AS_Normal:
- from AS_Standby if a V
CC
undervoltage recovery event is detected (V
CC
> V
uvr(VCC)
for
longer than t
rec(uv)(VCC)
), provided V
BUF
> V
uvr(BUF)
- from AS_Standby if a wake-up event is detected, provided V
BUF
> V
uvr(VBUF)
for longer
than t
rec(uv)(VBUF)
- from AS_Standby or AS_Sleep in response to a host ‘AS_Normal’ command
The TJA1085 switches from AS_Normal:
- to AS_Standby when a V
CC
undervoltage event is detected (V
CC
< V
uvd(VCC)
for longer
than t
det(uv)(VCC)
)