mc9s12xd256 Freescale Semiconductor, Inc, mc9s12xd256 Datasheet - Page 420

• Manufacturer Part Number: mc9s12xd256
• Description: Hcs12x Microcontrollers
• Manufacturer: Freescale Semiconductor, Inc

Chapter 10 Freescale’s Scalable Controller Area Network (S12MSCANV3)
10.1.2
10.1.3
The basic features of the MSCAN are as follows:
1. Depending on the actual bit timing and the clock jitter of the PLL.
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Wake-Up Interrupt Req.
Transmit Interrupt Req.
Receive Interrupt Req.
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Errors Interrupt Req.
Implementation of the CAN protocol — Version 2.0A/B
— Standard and extended data frames
— Zero to eight bytes data length
— Programmable bit rate up to 1 Mbps
— Support for remote frames
Five receive buffers with FIFO storage scheme
Three transmit buffers with internal prioritization using a “local priority” concept
Flexible maskable identifier filter supports two full-size (32-bit) extended identifier filters, or four
16-bit filters, or eight 8-bit filters
Programmable wakeup functionality with integrated low-pass filter
Programmable loopback mode supports self-test operation
Programmable listen-only mode for monitoring of CAN bus
Programmable bus-off recovery functionality
Separate signalling and interrupt capabilities for all CAN receiver and transmitter error states
(warning, error passive, bus-off)
Programmable MSCAN clock source either bus clock or oscillator clock
Oscillator Clock
Block Diagram
Features
Bus Clock
MSCAN
Figure 10-1. MSCAN Block Diagram
MUX
MC9S12XDP512 Data Sheet, Rev. 2.17
Configuration
CANCLK
Registers
Control
Status
and
1
Presc.
Tq Clk
Wake-Up
Low Pass Filter
Message
Buffering
Receive/
Transmit
Filtering
Engine
and
Freescale Semiconductor
RXCAN
TXCAN