Freescale Semiconductor Demonstration Board for Freescale MC9S12XHY256 Microcontroller DEMO9S12XHY256 DEMO9S12XHY256 Manuale Utente

Freescale Semiconductor

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The basic features of the MSCAN are as follows:

•

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

8

— 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 wake-up 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

•

Internal timer for time-stamping of received and transmitted messages

•

Three low-power modes: sleep, power down, and MSCAN enable

•

Global initialization of configuration registers

For a description of the specific MSCAN modes and the module operation related to the system operating
modes refer to

”.

8. Depending on the actual bit timing and the clock jitter of the PLL.