PIC16F720T-E/SO 查看數據表（PDF） - Microchip Technology

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PIC16F720T-E/SO

20-Pin Flash Microcontrollers

Microchip Technology 

PIC16(L)F720/721

FIGURE 17-3:

Write to

SSPBUF

SCK

(CKP = 0

CKE = 0)

SCK

(CKP = 1

CKE = 0)

SCK

(CKP = 0

CKE = 1)

SCK

(CKP = 1

CKE = 1)

SDO

(CKE = 0)

SDO

(CKE = 1)

SDI

(SMP = 0)

Input

Sample

(SMP = 0)

SDI

(SMP = 1)

Input

Sample

(SMP = 1)

SSPIF

SSPSR to

SSPBUF

SPI MASTER MODE WAVEFORM

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

bit 7

bit 6

bit 5

bit 4

bit 3

bit 2

bit 1

bit 0

bit 7

bit 0

bit 7

bit 0

EXAMPLE 17-1: LOADING THE SSPBUF (SSPSR) REGISTER

LOOP

BANKSEL

BTFSS

GOTO

BANKSEL

MOVF

MOVWF

MOVF

MOVWF

SSPSTAT

SSPSTAT, BF

LOOP

SSPBUF

SSPBUF, W

RXDATA

TXDATA, W

SSPBUF

;

;Has data been received(transmit complete)?

;No

;

;WREG reg = contents of SSPBUF

;Save in user RAM, if data is meaningful

;W reg = contents of TXDATA

;New data to xmit

4 Clock

Modes

DS41430D-page 140

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