Rainbow Electronics ATA6630 - Manual (Page 8)

8
9117C–AUTO–10/09
ATA6628/ATA6630 [Preliminary]
4. Modes of Operation
Figure 4-1. Modes of Operation
Unpowered Mode
(See Section 4.5)
a: V
S
> VS
thF
b: V
S
< VS
thU
c: Bus wake-up event
d: Wake up from WAKE or KL_15 pin
Fail-safe Mode
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
Watchdog: ON
Silent Mode
VCC: 3.3V/5V/50 mA
with undervoltage monitoring
Communication: OFF
Watchdog: OFF
Sleep Mode
VCC: switched off
Communication: OFF
Watchdog: 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 + e
e
c + d
b
Normal Mode
VCC: 3.3V/5V/50 mA
with undervoltage detection
watchdog: ON
High level at
pin SP_MODE:
High-speed Mode
Transceiver
≤
115 kBaud
LIN 2.1
Transceiver
≤ 20 kBaud
TXD time-out
timer on
Go to sleep command
e: NRES switches to low
Go to normal command
Table 4-1. Table of Modes
Mode of
Operation Transceiver Pin LIN V
CC
Pin Mode Watchdog Pin WD_OSC Pin INH
Unpowered Off Recessive On GND On On Off
Fail-safe Off Recessive 3.3V/5V GND On 1.23V On
Normal/
High-speed
On TXD depending 3.3V/5V GND On 1.23V On
Silent Off Recessive 3.3V/5V GND Off 0V Off
Sleep Off Recessive 0V GND Off 0V Off