AS8221
Data Sheet - App endix
Table 12. Comparison table
FlexRay
AS8221 Datasheet
Electrical Physical Layer Specification V2.1 Rev. B
Symbol
Parameter
Name
Description
Upper Receiver threshold for detecting
activity
VBUSActiveHigh
Activity detection differential input voltage high
uBusActiveHigh
Lower Receiver threshold for detecting
activity
VBUSActiveLow
VData1
Activity detection differential input voltage low
Data1 detection differential input voltage
Data0 detection differential input voltage
uBusActiveLow
uData1
Receiver threshold for detecting Data_1
Receiver threshold for detecting Data_0
VData0
uData0
Mismatch between Data0 and Data1
differential input voltage
VDataErr
uData
uCM
Mismatch of Receiver thresholds
Common mode voltage range (with
respect to GND) that does not disturb the
receive function
Max. common mode voltage range when
receiving
VRECEIVE_COM
tBUS_RxD10
tBUS_RxD01
tBIT
Delay from bus to RxD negative edge
Delay from bus to RxD positive edge
Bit time
dBDRx10
dBDRx01
-
Receiver delay, negative edge
Receiver delay, positive edge
-
Receiver delay mismatch
| dBDRx10 – dBDRx01 |
tRxD_ASYM
Delay time from bus to RxD mismatch
dRxAsym
tRxD_FALL
tRxD_RISE
Fall time RxD voltage
Rise time RxD voltage
dRxSlope
dRxSlope
Fall and rise time 20%-80%
Fall and rise time 20%-80%
tBUSIdleDetection
Idle detection time
dIdleDetection
Filter-time for idle detection
tBUSActivityDetection
Activity detection time
dActivityDetection
Filter-time for activity detection
tBUSIdleReaction
tBUSActivityReaction
Wake-Up Detector
Idle reaction time
dBDRxai
dBDRxia
Idle reaction time
Activity reaction time
Activity reaction time
Data0 detection time in remote wake-up
pattern
Acceptance timeout for detection of a Data_0
phase in wake-up pattern
tBWU_D0
dWU0Detect
dWUIdleDetect
dWUTimeout
Idle or Data1 detection time in remote wake-
up pattern
Acceptance timeout for detection of a Idle
phase in wake-up pattern
tBWU_Idle
Acceptance timeout for wake-up pattern
recognition
tBWU_Detect
Total remote wake-up detection time
VBWUTH
VLWUTH
Bus wake-up detection threshold
Local wake-up detection threshold
-
-
-
-
www.austriamicrosystems.com/flexray/AS8221
Revision 1.1
37 - 43
AMSCO [ AMS(艾迈斯) ]
