33902 Datasheet, PDF (14/31 Pages) Freescale Semiconductor, Inc – High Speed CAN Interface with Embedded 5.0 V Supply

FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Table 5. Functional Table
STBY EN
Mode
0
0
Standby
0
0
Sleep
0
1 Go to sleep
1
0 Listen Only
1
1
Normal
V_DD
ON ⁽⁸⁾
OFF
ON
ON
ON
INH
High
HZ
High
High
High
RXD
CAN
Active LOW:
report wake-up event ⁽⁹⁾
Terminated to GND
High: recessive state
Low: dominant state
Receiver: ON
Driver: OFF
Driver and
Receiver: ON
Notes
8. With limited current capability, in order to maintain the capacitor at V_DD pin charged
9. Provided if V_IO > 2.5 V.
10. Before 4th TX pulse rising edge
ERR (active low)
Active LOW:
report wake-up event ⁽⁹⁾
•Report local failure, V_DD
low, Bat fail
•wake-up source ⁽¹⁰⁾
•BUS failures, V_DD low
V_SUP
V_SUP_low
5.8 V
V_SUP_low
5.0 V
5.8 V
5.0 V
V_DD
V_DD_low
4.25 V
~3.0 V
CAN driver enabled
4.25 V
Start
End
V_DD overload condition
5.0 V
V_DD
V_DD_low
4.25 V
V_DD re-enabled
4.25 V
(3)
V_DD re-enabled (2)
50 ms
V_DD disabled (3)
10 ms
CAN driver disabled
ERR(1)
EN, STBY, V_IO high
ERR(1)
MODE
50 ms
V_DD disabled
10 ms
CAN driver disable
Normal or Listen Only
Normal or Listen Only
2
V_DD low illustration, V_SUP > V_SUP low (V_SUP > 5.8 V)
V_DD low illustration, cranking pulse V_SUP < V_SUP low (V_SUP < 5.8 V) and CRANK bit low in P_SPI register.
1) See figure on ERR reporting
2) V_DD is re enabled when V_SUP recovers (V_SUP low flag goes from H to L) or by a mode change via EN and STBY input.
3) Capacitor charged maintained by internal device current source
Figure 9. V_DD Low Illustration
33902
14
Analog Integrated Circuit Device Data
Freescale Semiconductor