AS8222

Datasheet - B u s D r i v e r

www.ams.com/eng/FlexRay/AS8222

Revision 1.0

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8.4 Receiver

The receiver generates from the FlexRay differential bus voltage a digital signal on the RxD and RxEN pins. RxD shows the data (Data0 and

Data1) and RxEN shows the bus idle and activity status received on the bus pins. The receiver is only active in NORMAL and RECEIVE_ONLY

mode.

Figure 11. Timing Characteristics (BUS

→ RxD and RxEN)

8.4.1 Bus activity and idle detection (only in NORMAL and RECEIVE ONLY mode)





Activity is detected, RxEN is switched to logical low and RxD is following the detected bus data states as indicated below with a time

Table 23. Logic Table for Receiver Bus Signal Detection

Receiver Operation Mode

Bus State / Signals

RxEN

RxD

Normal power modes (NORMAL and RECEIVE-ONLY mode)

Idle

H

H

Data0

L

L

Data1

L

H