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AS8220 Folha de dados(PDF) 17 Page - ams AG

Nome de Peças AS8220
Descrição Electrónicos  FlexRay Basis Transceiver
PDF  34 Pages
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Fabricante Electrônico  AMSCO [ams AG]
Página de início  http://www.ams.com
Logo AMSCO - ams AG

AS8220 Folha de dados(HTML) 17 Page - ams AG

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Revision 17920-001-10a
16 - 33
AS8220A
Objective Data Sheet - Detailed Description
ERRN Signalling
The ERRN signalling is shown in Table 8.
Table 8. ERRN signalling
SUPPLY VOLTAGE FLAG EVENT
VIO
HOST COMMAND
STBN
ERRN
Note: ERROR means the logic OR of the error flags
Loss of ground
In case the ground of the device is disconnected and the host pins are open, the bus lines are switched to Idle_HZ.
Error Flags Description
Bus error
The bus error flag is set when 2 consecutive rising edges on the TxD pin without any rising edge on the RxD pin are
detected or when 2 consecutive falling edges on the TxD pin without any falling edge on the RxD pin are detected. This
flag is reset when a rising edge on the TxD pin is followed by a rising edge on RxD pin before of the next TxD rising
edge or when a falling edge on the TxD pin is followed by a falling edge on RxD pin before of the next TxD falling edge.
This flag can be set or reset only in NORMAL mode when the transmitter is enabled. The flag is reset at power off.
Low current on BP high side driver
This flag can only be set/reset in NORMAL mode when the driver is enabled and during the transmission of a stable
Data1 longer than tBUS_ERROR. If the absolute value of the BP pin current is lower than ITHL after tBUS_ERROR since the
driver enable signal then the flag is set otherwise it is reset. The flag is reset at power off.
Low current on BP low side driver
This flag can only be set/reset in NORMAL mode when the driver is enabled and during the transmission of a stable
Data0 longer than tBUS_ERROR. If the absolute value of the BP pin current is lower than ITHL after tBUS_ERROR since the
driver enable signal then the flag is set otherwise it is reset. The flag is reset at power off.
Low current on BM high side driver
This flag can only be set/reset in NORMAL mode when the driver is enabled and during the transmission of a stable
Data0 longer than tBUS_ERROR. If the absolute value of the BM pin current is lower than ITHL after tBUS_ERROR since the
driver enable signal then the flag is set otherwise it is reset. The flag is reset at power off.
Low current on BM low side driver
This flag can only be set/reset in NORMAL mode when the driver is enabled and during the transmission of a stable
Data1 longer than tBUS_ERROR. If the absolute value of the BM pin current is lower than ITHL after tBUS_ERROR since the
driver enable signal then the flag is set otherwise it is reset. The flag is reset at power off.
High current on BP high side driver
This flag can only be set/reset in NORMAL mode when the driver is enabled and during the transmission of a stable
Data1 longer than tBUS_ERROR. If the absolute value of the BP pin current is higher than ITHH after tBUS_ERROR since
the driver enable signal then the flag is set otherwise it is reset. The flag is reset at power off.
High current on BP low side driver
This flag can only be set/reset in NORMAL mode when the driver is enabled and during the transmission of a stable
Data0 longer than tBUS_ERROR. If the absolute value of the BP pin current is higher than ITHH after tBUS_ERROR since
the driver enable signal then the flag is set otherwise it is reset. The flag is reset at power off.
L
H
not failure
LL
H
LXL



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