MCZ33989EG Freescale Semiconductor, MCZ33989EG Datasheet - Page 48

• Manufacturer Part Number: MCZ33989EG
• Description: IC SYSTEM BASIS CHIP CAN 28-SOIC
• Manufacturer: Freescale Semiconductor

Specifications of MCZ33989EG

• Applications: *
• Interface: *
• Voltage - Supply: *
• Package / Case: 28-SOIC (7.5mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

CAN Mode versus SBC Modes
the SBC modes as well as the status of TX, RX and the CAN
bus pins.
Table 34. CAN vs SBC Modes
How to Test the MC33989 CAN Interface
MC33989 can be connected as in the following figure. V2 is
connected to V1. The device is supplied with nominal supply
(12 V at VSUP input pin). After power on, reset the device,
48
33989
TYPICAL APPLICATIONS
SUPPLEMENTAL APPLICATION NOTES
Unpowered
Reset (with ballast)
Normal request (with ballast)
Normal
Normal
Standby with external ballast
Standby without external
ballast, V2 connected to V1
Standby without external
ballast, V2 connected to V1
Sleep
Stop
The table below indicates the CAN interface modes versus
The CAN interface can be easily set up and tested.
SBC mode
CANL
CANH
CAN bus
External
ballast
for V2
YES
YES
YES
YES
YES
YES
NO
NO
—
—
C1
Figure 38. Testing the CAN Interface
Normal Slew rate
Normal or sleep
Sleep mode
CAN mode
Unpowered
RT
Normal
0,1,2,3
Sleep
Sleep
Sleep
C2
VSUP
HS1
L0
L1
L2
CANH
CANL
L3
V2CTRL
MC33989
GND
V2
voltage
RESET
MISO
MOSI
0 V
0 V
0 V
5 V
5 V
0 V
5 V
5 V
0 V
0 V
V2
SCK
RST
WD
INT
enter normal request mode, and the CAN interface is set in
normal mode, slew rate 0. TX can be driven by a signal
generator. RX will report the bus state. The figure below is a
simple test schematic.
CS
TX
RX
V1
Internal pull up
normal mode
C3
Same as
to V2.
LOW
LOW
LOW
LOW
LOW
LOW
5 V
5 V
TX
C4
Signal generator
F<500kz (1Mb/s)
Analog Integrated Circuit Device Data
Report bus state
recessive, Low if
Same as normal
Components list:
C1: 22uF, C2: 100nF
C3: >10uF
C4: 100nF
Rt: 60 ohms
Signal at RX output
High if bus
dominant
mode
LOW
LOW
LOW
LOW
LOW
LOW
5 V
5 V
RX
Freescale Semiconductor
CANH = CANL =
Same as normal
(disconnected
Floating to gnd
Floating to gnd
Floating to gnd
Floating to gnd
Floating to gnd
Floating to gnd
Floating to gnd
Floating to gnd
Bus recessive
CANH/CANL
from other
nodes)
mode
2.5 V