參數(shù)資料
型號: HC05V7GRS
英文描述: 68HC05V7 General Release Specification
中文描述: 68HC05V7一般版本規(guī)范
文件頁數(shù): 106/170頁
文件大?。?/td> 980K
代理商: HC05V7GRS
MOTOROLA
Page 92
SECTION 15: MESSAGE DATA LINK CONTROLLER
MC68HC05V7 Specification Rev. 1.0
15.1
OUTLINE
The CPU Interface contains the software addressable registers and provides the link
between the CPU and the Tx and Rx Buffers. The Tx and Rx Buffers provide storage for
data received and data to be transmitted onto the J1850 bus. The Protocol Handler is
responsible for the encoding and decoding of data bits and special message symbols
during transmission and reception. The MUX Interface provides the link between the MDLC
digital section and the analog Physical Interface. The wave shaping, driving, and digitizing
of data is performed by the Physical Interface.
NOTE:
The bus data rate depends upon the microcontroller oscillator frequency
(f
OSC
) and the MDLC rate selection control bits (R0, R1). The correct
combination for the application must be chosen in order for J1850 bus
communications to take place. See
15.2.2.3 R1, R0 - Rate Select
.
Physical Interface
To CPU
Protocol Handler
MUX Interface
CPU Interface
Rx/Tx
To J1850 Bus
MDLC
F
For More Information On This Product,
Go to: www.freescale.com
n
.
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