• 參數(shù)資料
    型號(hào): SAB-C505-2RM
    廠商: SIEMENS A G
    元件分類: 微控制器/微處理器
    英文描述: 8-Bit CMOS Microcontroller
    中文描述: 8-BIT, MROM, 20 MHz, MICROCONTROLLER, PQFP44
    封裝: PLASTIC, MQFP-44
    文件頁數(shù): 37/85頁
    文件大?。?/td> 335K
    代理商: SAB-C505-2RM
    Semiconductor Group
    37
    1997-12-01
    C505 / C505C
    C505A / C505CA
    CAN Controller (C505C and C505CA only)
    The on-chip CAN controller, compliant to version 2.0B, is the functional heart which provides all
    resources that are required to run the standard CAN protocol (11-bit identifiers) as well as the
    extended CAN protocol (29-bit identifiers). It provides a sophisticated object layer to relieve the
    CPU of as much overhead as possible when controlling many different message objects (up to 15).
    This includes bus arbitration, resending of garbled messages, error handling, interrupt generation,
    etc. In order to implement the physical layer, external components have to be connected to the
    C505.
    The internal bus interface connects the on-chip CAN controller to the internal bus of the
    microcontroller. The registers and data locations of the CAN interface are mapped to a specific
    256 byte wide address range of the external data memory area (F700H to F7FFH) and can be
    accessed using MOVX instructions.
    Figure 15
    shows a block diagram of the on-chip CAN
    controller.
    Figure 15
    CAN Controller Block Diagram
    MCB02736
    Bit
    Timing
    Logic
    Timing
    Generator
    BTL-Configuration
    CRC
    Gen./Check
    TX/RX Shift Register
    TXDC
    RXDC
    Intelligent
    Memory
    Interrupt
    Register
    Processor
    Register
    Status
    Stream
    Bit
    Error
    Logic
    Management
    Messages
    Handlers
    Control
    Status +
    to internal Bus
    Clocks
    (to all)
    Control
    Messages
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