參數(shù)資料
型號(hào)： MC68HC58DW
廠商： MOTOROLA INC
元件分類(lèi)： 微控制器/微處理器
英文描述： 1 CHANNEL(S), LOCAL AREA NETWORK CONTROLLER, PDSO28
封裝： SOIC-28
文件頁(yè)數(shù)： 54/102頁(yè)
文件大?。?/td> 700K
代理商： MC68HC58DW
MC68HC58
DATA LINK CONTROLLER OPERATION
MOTOROLA
TECHNICAL DATA
4-11
Figure 4-8 Host/DLC Serial Mode Initialization Routine
4.2.3 Interrupt Requests
Generation of interrupt requests is determined by the values of the configuration byte
IMSK and IMOD bits. By default, the DLC automatically asserts the INT signal when
one or more of four conditions occur. Setting the IMSK bit disables interrupts. Setting
the IMOD bit adds a fifth interrupt request condition.
START DLC SERIAL MODE
INIT ROUTINE
DLC RESET NEGATED
ASSERT DLC CS
LOAD CONFIGURATION BYTE INTO SPI
DATA REGISTER, INITIATING SPI TRANSFER
IS SPI TRANSFER COMPLETE?
NO
RETRIEVE THE STATUS BYTE RECEIVED
FROM THE DLC FROM SPI DATA REGISTER
YES
A
LOAD “LOAD AS CONFIGURATION
BYTE IMMEDIATE” COMMAND BYTE
BIT COMBINATION INTO SPI DATA
REGISTER, INITIATING SPI
TRANSFER
IS SPI TRANSFER COMPLETE?
NO
YES
RETRIEVE THE DATA BYTE RECEIVED
FROM THE DLC FROM SPI DATA REGISTER
AND DISCARD
NEGATE DLC CS
DLC IS NOW READY FOR J1850
MULTIPLEX BUS COMMUNICATION
END DLC SERIAL MODE
INIT ROUTINE
INIT FLOW
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