ata6663 ATMEL Corporation, ata6663 Datasheet - Page 5

• Manufacturer Part Number: ata6663
• Description: Lin Transceiver
• Manufacturer: ATMEL Corporation

3.11
9146D–AUTO–09/10
Operation Modes
Figure 3-1.
Table 3-1.
Wake-up events from sleep mode:
Figure 3-1 on page
wake-up operations.
Mode of Operation
1. Normal Mode
2. Sleep Mode
3. Fail-safe Mode
• LIN bus
• EN pin
• WAKE pin
• VS undervoltage
This is the normal transmitting and receiving mode. All features are available.
In this mode the transmission path is disabled and the device is in low-power mode.
Supply current from V
pin WAKE will be detected and will switch the device to fail-safe mode. If EN then
switches to high, normal mode is activated. Input debounce timers at pin WAKE
(t
motive transients or EMI. In sleep mode the INH pin remains floating. The internal
termination between pin LIN and pin V
ical 10 µA) between pin LIN and pin V
independently from the actual level on pin LIN or WAKE.
At system power-up or after a wake-up event, the device automatically switches to
fail-safe mode. It switches the INH pin to a high state, to the V
exceeds 5V. LIN communication is switched off. The microcontroller of the application
will then confirm normal mode by setting the EN pin to high.
INH: high (INH HS switch ON)
Fail-safe
WAKE
Normal
Sleep
Communication: ON
Normal Mode
), LIN (t
Mode of Operation
Table of Operation Modes
b
BUS
& NOT b
5,
EN = 1
) and EN (t
Figure 3-2 on page 6
Transceiver
Batt
EN = 0
EN = 1
Off
On
Off
is typically 10µA. A wake-up signal from the LIN bus or via
INH: high (INH HS switch ON) if VS > 5V
sleep
RXD: see table of Modes
,t
Communication: OFF
nom
Go to sleep command
Local wake-up event
Fail-safe Mode
) prevent unwanted wake-up events due to auto-
S
On, except
S
Power-up
a
VS < 5V
is present. Sleep mode can be activated
Atmel ATA6663/ATA6664
is disabled. Only a weak pull-up current (typ-
and
INH
On
Off
Figure 3-5 on page 8
High, except after
LIN depending
High ohmic
wake-up
c or d
INH: high impedance (INH HS switch OFF)
RXD
a: Power-up (V
b: V
c: Bus wake-up event
d: Wake-up from wake switch
b
S
S
level when VS
< 5V
Communication: OFF
Sleep Mode
show the details of
S
> 3V)
TXD depending
Recessive
Recessive
LIN
5