Rainbow Electronics ATA6631 - Manual (Page 5)

5
9165A–AUTO–11/09
ATA6629/ATA6631
4. Mode of Operation
Figure 4-1. Mode of Operation
Unpowered Mode
(See section 4.5)
a: V
S
> VS
thF
b: V
S
< VS
thU
c: Bus wake-up event
d: NRES switches to low
Fail-safe Mode
Normal Mode
VCC: 3.3V/5V/50 mA
with undervoltage
monitoring
Communication: ON
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
Silent Mode
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
Sleep Mode
VCC: switched off
Communication: OFF
Go to silent command
a
TXD = 0
EN = 0
TXD = 1
EN = 0
EN = 1
EN = 1
EN = 1
b
b
b
c + d
d
c
b
Local wake-up event
Go to sleep command
Table 4-1. Mode of Operation
Mode of Operation Transceiver V
CC
LIN
Fail safe OFF 3.3V/5V Recessive
Normal ON 3.3V/5V TXD depending
Silent OFF 3.3V/5V Recessive
Sleep OFF 0V Recessive