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HX711 Datasheet(PDF) 7 Page - Avia Semiconductor Co., Ltd.

No. de pieza HX711
Descripción Electrónicos  24-Bit Analog-to-Digital Converter (ADC) for Weigh Scales
Download  9 Pages
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Fabricante Electrónico  AVIA [Avia Semiconductor Co., Ltd.]
Página de inicio  http://www.aviaic.com/ENDefault.aspx
Logo AVIA - Avia Semiconductor Co., Ltd.

HX711 Datasheet(HTML) 7 Page - Avia Semiconductor Co., Ltd.

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HX711
AVIA SEMICONDUCTOR
V2.0
7
Reference Driver (Assembly)
/*-------------------------------------------------------------------
Call from ASM:
LCALL
ReaAD
Call from C:
extern unsigned long ReadAD(void);
.
.
unsigned long data;
data=ReadAD();
.
.
----------------------------------------------------------------------*/
PUBLIC
ReadAD
HX711ROM
segment
code
rseg
HX711ROM
sbit
ADDO = P1.5;
sbit
ADSK = P0.0;
/*--------------------------------------------------
OUT:
R4, R5, R6, R7
R7=>LSB
---------------------------------------------------*/
ReadAD:
CLR
ADSK
//AD Enable(PD_SCK set low)
SETB
ADDO
//Enable 51CPU I/0
JB
ADDO,$
//AD conversion completed?
MOV
R4,#24
ShiftOut:
SETB
ADSK
//PD_SCK set high(positive pulse)
NOP
CLR
ADSK
//PD_SCK set low
MOV
C,ADDO
//read on bit
XCH
A,R7
//move data
RLC
A
XCH
A,R7
XCH
A,R6
RLC
A
XCH
A,R6
XCH
A,R5
RLC
A
XCH
A,R5
DJNZ
R4,ShiftOut
//moved 24BIT?
SETB
ADSK
NOP
CLR
ADSK
RET
END


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