Rainbow-electronics ATA6630 Manuale Utente Pagina 12
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12
9117C–AUTO–10/09
ATA6628/ATA6630 [Preliminary]
A falling edge at the LIN pin followed by a dominant bus level maintained for a certain time
period (t
bus
) and a rising edge at pin LIN result in a remote wake-up request. The device
switches from Sleep Mode to Fail-safe Mode.
The VCC 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 the RXD pin to interrupt the microcon-
troller (see Figure 4-5 on page 12).
EN high can be used to switch directly from Sleep/Silent to Fail-safe Mode. If EN is still high after
VCC ramp up and undervoltage reset time, the IC switches to the Normal Mode.
Figure 4-5. LIN Wake Up from Sleep Mode
Regulator wake-up time
Off state
On state
Low
Fail-safe Mode Normal Mode
EN High
Microcontroller
Reset
time
Low or floating
Floating
Watchdog
NRES
EN
VCC
voltage
regulator
RXD
LIN bus
Bus wake-up filtering time
t
bus
TXD
Watchdog off Start watchdog lead time t
d
start-up time delay
- Features 1
- 1. Description 1
- Figure 1-1. Block Diagram 2
- 3. Functional Description 4
- 4. Modes of Operation 8
- Normal mode 10
- ATA6628/ATA6630 [Preliminary] 11
- 9117C–AUTO–10/09 12
- Sleep/Silent 14
- 4.6 Unpowered Mode 16
- 4.7 High-speed Mode 16
- 5.5 Fail-safe Features 18
- 6. Watchdog 20
- 7. Absolute Maximum Ratings 22
- 11. Package Information 32
- 10. Ordering Information 32
- Headquarters International 34
- Product Contact 34
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