參數(shù)資料
型號(hào)： ATA6620-TASY
廠商： Atmel
文件頁(yè)數(shù)： 21/22頁(yè)
文件大?。?/td> 0K
描述： IC TXRX LIN BUS 5V/50MA 8SOIC
標(biāo)準(zhǔn)包裝： 112
類型： 收發(fā)器
規(guī)程： LIN
電源電壓： 5 V ~ 18 V
安裝類型： 表面貼裝
封裝/外殼： 8-SOIC（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 8-SO
包裝： 管件
8
4850I–AUTO–09/09
ATA6620N
4.2.2
Sleep Mode
A falling edge at EN while TXD is low switches the IC into Sleep mode. The TXD Signal has to
be logic low during the Mode Select window (see Figure 4-4). We recommend using the same
microcontroller port for EN as for TXD; in this case the mode change is only one command.
In Sleep mode the transmission path is disabled. Supply current from V
Batt is typically
I
VSsleep =10A. The VCC regulator is switched off; NRES and RXD are low. The internal slave
termination between pin LIN and pin VS is disabled to minimize the power dissipation in case pin
LIN is short-circuited to GND. Only a weak pull-up current (typically 10 A) between pin LIN and
pin VS is present.
A falling edge at pin LIN followed by a dominant bus level maintained for a certain time period
(t
bus) results in a remote wake-up request. The device switches from Sleep mode to Pre-normal
mode. The V
CC regulator is activated and the internal LIN slave termination resistor is switched
on. The remote wake-up request is indicated by a low level at pin RXD to interrupt the microcon-
troller and a high level at pin TXD (see Figure 4-5 on page 9).
With EN high you can switch directly from Silent to Normal mode. In the application where the
ATA6620N supplies the microcontroller, the wake-up from Sleep mode is only possible via pin
LIN.
If the device is switched into Sleep mode, V
CC ramps down without generating an undervoltage
reset at pin NRES.
Figure 4-4.
Switch to Sleep Mode
EN
td = 3.2 s
TXD
Sleep Mode
VCC
Delay time sleep mode
td_sleep = maximum 20 s
LIN
LIN switches directly to recessive mode
Mode select window
NRES
Normal Mode
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