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PIC16F720-E/ML 데이터시트(PDF) 142 Page - Microchip Technology

부품명 PIC16F720-E/ML
상세설명  20-Pin Flash Microcontrollers with nanoWatt XLP Technology
PDF  244 Pages
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제조업체  MICROCHIP [Microchip Technology]
홈페이지  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

PIC16F720-E/ML 데이터시트(HTML) 142 Page - Microchip Technology

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PIC16F/LF720/721
DS41430A-page 142
 2010 Microchip Technology Inc.
FIGURE 17-3:
SPI MASTER MODE WAVEFORM
EXAMPLE 17-1:
LOADING THE SSPBUF (SSPSR) REGISTER
SCK
(CKP = 0
SCK
(CKP = 1
SCK
(CKP = 0
SCK
(CKP = 1
4 Clock
Modes
Input
Sample
Input
Sample
SDI
bit 7
bit 0
SDO
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
bit 7
bit 0
SDI
SSPIF
(SMP = 1)
(SMP = 0)
(SMP = 1)
CKE = 1)
CKE = 0)
CKE = 1)
CKE = 0)
(SMP = 0)
Write to
SSPBUF
SSPSR to
SSPBUF
SDO
bit 7
bit 6
bit 5
bit 4
bit 3
bit 2
bit 1
bit 0
(CKE = 0)
(CKE = 1)
BANKSEL
SSPSTAT
;
LOOP
BTFSS
SSPSTAT, BF
;Has data been received(transmit complete)?
GOTO
LOOP
;No
BANKSEL
SSPBUF
;
MOVF
SSPBUF, W
;WREG reg = contents of SSPBUF
MOVWF
RXDATA
;Save in user RAM, if data is meaningful
MOVF
TXDATA, W
;W reg = contents of TXDATA
MOVWF
SSPBUF
;New data to xmit



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