參數(shù)資料
型號(hào): EM78P451
英文描述: Dual Advanced Synchronous Rectified Buck MOSFET Drivers with Protection Features; Temperature Range: 0&degC to 70°C; Package: 16-QFN
中文描述: 8位微控制器的通用產(chǎn)品[英文]
文件頁(yè)數(shù): 20/52頁(yè)
文件大小: 1287K
代理商: EM78P451
EM78P451
OTP ROM
This specification is subject to change without prior notice.
2002/03/01
27
6. Software Application of SPI
Example for SPI:
For Master
ORG 0X0
SETTING:
CLRA
IOW 0X05
;SET PORT5 OUTPUT
IOW 0X06
;SET PORT6 OUTPUT
MOV 0X05,A
MOV A,@0B11001111 ;SET PRESCALER FOR WDT
CONTW
MOV A,@0B00010001 ;DISABLE WAKEUP FUNCTION
IOW 0X0E
MOV A,@0B00000000 ;DISABLE INTERRUPT
IOW 0X0F
MOV A,@0X07
;SDI INPUT AND SDO, SCK OUTPUT
IOW 0X09
MOV A,@0B10000000 ;CLEAR RBF AND RBFIF FLAG
MOV 0X0C,A
MOV A,@0B11100000 ;SELECT CLOCK EDGE AND ENABLE SPI
MOV 0X0D,A
START:
WDTC
BC 0X0C,1
;CLEAR RBFIF FLAG
MOV A,@0XFF
MOV 0X05,A
;SHOW A SIGNAL AT PORT5
MOV 0X0A,A
;MOVE FF AT READ BUFFER
MOV A,@0XAA
;MOVE AA AT WRITE BUFFER
MOV 0X0B,A
BS 0X0D,4
;START TO SHIFT SPI DATA
NOP
JBC 0X0D,4
;POLLING LOOP FOR CHECKING SPI TRANSMISSION COMPLETED
JMP $-2
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