DV250501 Microchip Technology, DV250501 Datasheet - Page 26

• Manufacturer Part Number: DV250501
• Description: KIT DEV CAN MCP250XX
• Manufacturer: Microchip Technology
• Type: Network Controller & Processorr

Specifications of DV250501

• Main Purpose: Interface, CAN I/O Expander
• Embedded: Yes, MCU, 8-Bit
• Utilized Ic / Part: MCP25020, MCP25050
• Primary Attributes: V2.0B up to 1Mb/s Data Rate
• Data Rate: 1 Mbps
• Interface Type: CAN
• Operating Voltage: 2.7 V to 5.5 V
• Product: Modules
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Secondary Attributes: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: Q1221418

2.5
DS51266C-page 22
EXPLAINING THE CAN MESSAGES
At this point, the two nodes (PC Node and Node B) should be communicating normally
and a message should be showing up in the Output window (Figure 2-5) at regular
intervals. Pushing GP4, GP5 or GP6 causes other messages to show up in the Output
window, with the status being reflected graphically in the Demo window. Turning the
potentiometers will cause the data fields to change.
This section explains the CAN messages as seen in the Output (Bus Monitor) window.
TABLE 2-1:
Identifier
0x008
0x018
0x280
0x290
0x7FF
Length
3
8
0
8
0
CAN MESSAGES EXPLAINED
“Write Register” Input Message
(IM)
Read A/D Regs
None
Read A/D Regs
None
Data
DB0 (address) is either 0x23 or 0x26
(PR1 or PWM2DCH).
“Read A/D Regs“ IRM followed by
OM.
On-bus message.
A/D Threshold Detection (R20, POT
and PWM2 duty cycle).
Command Acknowledge in response
to IM.
2004 Microchip Technology Inc.
Explanation