參數(shù)資料
型號(hào)： L9952GXP
廠商： STMICROELECTRONICS
元件分類： 電源管理
英文描述： 1-CHANNEL POWER SUPPLY MANAGEMENT CKT, PDSO36
封裝： LEAD FREE, SSO-36
文件頁(yè)數(shù)： 15/68頁(yè)
文件大?。?/td> 859K
代理商： L9952GXP
Description
L9952GXP
Doc ID 13518 Rev 5
2.17
Error handling
The L9952GXP provides the following 3 error handling features which are not described in
the LIN Spec. V2.1, but are realized in different stand alone LIN transceivers / micro
controllers to switch the application back to normal operation mode.
2.17.1
Dominant TxD time out
If TXI is in dominant state (low) for more than 12ms (typ) the transmitter will be disabled until
TXI becomes recessive (high). This feature can be disabled via SPI.
2.17.2
Short to battery time out
If TXI changes to dominant (low) state but RXI signal does not follow within 40
s, the
transmitter will be disabled until TXI becomes recessive (high).
2.17.3
Short to ground mode
A wake up caused by a message on the bus will start the voltage regulator and the micro
controller to switch the application back to normal operation mode.
2.18
Wake up (from LIN)
In standby mode the L9952GXP can receive a wake up from LIN bus. For the wake up
feature the L9952GXP logic differentiates two different conditions.
2.18.1
Normal wake up
Normal wake up can occur when the LIN transceiver was set in standby mode while LIN was
in recessive (high) state. A dominant level at LIN for at least 40s, will switch the L9952GXP
to active mode.
2.18.2
Wake up from short to GND condition
If the LIN transceiver was set in standby mode while LIN was in dominant (low) state,
recessive level at LIN for at least 40us, will switch the L9952GXP to active mode.
2.18.3
RxD pin in V1 standby
In V1 standby condition the RxD is a tristate pin.
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