DSP56F807 Motorola Inc, DSP56F807 Datasheet - Page 38

• Manufacturer Part Number: DSP56F807
• Description: 56F807 16-bit Hybrid Processor
• Manufacturer: Motorola Inc

.
3.13 Controller Area Network (CAN) Timing
Operating Conditions:
38
MSCAN_RX
CAN receive
Baud Rate
Bus Wakeup detection
1.
2.
3.
4.
1.
bus event (on MSCAN_RX pin) whose duration is less than 5 microseconds is filtered away. However, a valid CAN bus
wakeup detection takes place for a wakeup pulse equal to or greater than 5 microseconds. The number 5 microseconds
originates from the fact that the CAN wakeup message consists of 5 dominant bits at the highest possible baud rate of
1Mbps.
2.
data pin
(Input)
Parasitic capacitance due to package, pin to pin, and pin to package base coupling. (1.8pf)
Parasitic capacitance due to the chip bond pad, ESD protection devices and signal routing. (2.04pf)
Equivalent resistance for the ESD isolation resistor and the channel select mux. (500 ohms)
Sampling capacitor at the sample and hold circuit. Capacitor 4 is normally disconnected from the input and is
only connected to it at sampling time. (1pf)
If Wakeup glitch filter is enabled during the design initialization and also CAN is put into SLEEP mode then, any
Parameters listed are guaranteed by design
ADC analog input
Characteristic
V
1
SS
Figure 29. Equivalent Analog Input Circuit
= V
1
Freescale Semiconductor, Inc.
SSA
For More Information On This Product,
Figure 30. Bus Wakeup Detection
= 0 V, V
Table 36. CAN Timing
DD
Go to: www.freescale.com
= V
T
Symbol
2
BR
WAKEUP
DDA
T
CAN
WAKEUP
= 3.0–3.6 V, T
A
= –40 to +85 C, C
Min
—
5
3
2
L
4
50pF, MSCAN Clock = 30MHz
Max
—
1
56F807 Technical Data
Mbps
Unit
s