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33742 Datasheet(PDF) 39 Page - Freescale Semiconductor, Inc

Part # 33742
Description  System Basis Chip with Enhanced High Speed CAN Transceiver
PDF  70 Pages
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Manufacturer  FREESCALE [Freescale Semiconductor, Inc]
Direct Link  http://www.freescale.com
Logo FREESCALE - Freescale Semiconductor, Inc

33742 Datasheet(HTML) 39 Page - Freescale Semiconductor, Inc

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Analog Integrated Circuit Device Data
Freescale Semiconductor
39
33742
FUNCTIONAL DEVICE OPERATION
OPERATIONAL MODES
Table 9. CAN Interface/33742S Modes and Pin Status—Operation with Ballast on V2(45)
Mode
CAN Mode
(Controlled by SPI)
V2 Voltage
TXD Pin
RXD Pin(46)
CANH/CANL
(Disconnected from
Other Node)
CAN
Communication
Unpowered
–
0.0V
LOW
LOW
Floating to GND
NO
Reset (with Ballast)
–
0.0V
LOW
LOW
Floating to GND
NO
Normal Request
(with Ballast)
–
0.0V
LOW
LOW
Floating to GND
NO
Normal
Sleep
5.0V
0.0V
5.0V
Floating to GND
NO
Normal
Normal
Slew Rate 0, 1, 2, 3
5.0V
Internal Pullup
to V2
Report Bus State
HIGH if Bus
Recessive,
LOW if dominant
Bus Recessive
CANH = CANL = 2.5V
YES
Standby with
External Ballast
Normal or Sleep
0.0V
LOW
LOW
Floating to GND
NO
Sleep
Sleep
0.0V
LOW
LOW
Floating to GND
NO.
Wake-up if enabled
Stop
Sleep
0.0V
LOW
LOW
Floating to GND
NO.
Wake-up if enabled
Notes
45.
See also Figure 31, page 57.
46.
The state of the RXD pin is dependant upon: 1) the V2 voltage, 2) the external circuitry connected to RXD, (i.e. the MCU RXD pin), and
3) any external pull-up between RXD and the 5V supply.
Table 10. CAN Interface/33742 Modes and Pin Status—Operation without Ballast on V2 (47)
Mode
CAN Mode
(Controlled by SPI)
V2 Voltage
TXD Pin
RXD Pin(48)
CANH/CANL
(Disconnected from
Other Node)
CAN
Communication
Unpowered
–
0.0V
LOW
LOW
Floating to GND
NO
Reset (without Ballast)
–
5.0V
LOW
LOW
Floating to GND
NO
Normal Request without
Ballast.
V2 Connected to VDD
–
5.0V
LOW
5.0V
Floating to GND
NO
Standby without External
Ballast,.
V2 connected to VDD
Normal or Sleep
5.0V
0.0V
5.0V
Floating to GND
NO
Normal without External
Ballast.
V2 Connected to VDD
Normal
Slew Rate 0, 1, 2,3
5.0V
5.0V
5.0V
Bus Recessive
CANH = CANL = 2.5V
YES
Normal without External
Ballast,.
V2 Connected to VDD
Sleep
5.0V
0.0V
5.0V
Floating to GND
NO
Sleep
Sleep
0.0V
LOW
LOW
Floating to GND
NO.
Wake-up if enabled
Stop
Sleep
5.0V
LOW
LOW
Floating to GND
NO.
Wake-up if enabled
Notes
47.
See also Figure 36, page 60.
48.
The state of the RXD pin is dependant upon: 1) the V2 voltage, 2) the external circuitry connected to RXD, (i.e. the MCU RXD pin), and
3) any external pull-up between RXD and the 5V supply.



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