AS8221
Data Sheet - Detailed Description
8.17 Transmitter
The transmitter generates out of a digital input signal on TxD the FlexRay differential bus voltage. The transmitter is only active in NORMAL
mode if BGE is on logical high and TxEN is on logical low.
Figure 12. Transmitter characteristics (TxD → BUS)
VTxD
50% * VIO
Data1: x * tBIT
Data0: x * tBIT
VBUS
tTxD_BUS01
tTxD_BUS10
tBUS01
tBUS10
VBUS_DIFF_D1
80% *
VBUS_DIFF_D1
300 mV
+ VBUS_DIFF_Idle
- VBUS_DIFF_Idle
- 300 mV
20% *
VBUS_DIFF_D1
VBUS_DIFF_D0
Data1: x * tBIT
Data0: x * tBIT
Figure 13. Transmitter characteristics (TxEN → BUS)
VTxEN
50% * V
IO
< tTxEN_timeout
< tTxEN_timeout
VBUS
tTxEN_BUS_Active_Idle
tTxEN_BUS_Idle_Active
tBUS_Active_Idle
tBUS_Idle_Active
VBUS_DIFF_D1
300 mV
+ VBUS_DIFF_Idle
- VBUS_DIFF_Idle
- 300 mV
VBUS_DIFF_D0
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