Microchip Technology ARD00330 データシート
2010 Microchip Technology Inc.
Preliminary
DS39979A-page 451
PIC18F87J72 FAMILY
B.5.6
SPI MODE 0,0 - CLOCK IDLE LOW,
READ/WRITE EXAMPLES
READ/WRITE EXAMPLES
In this SPI mode, the clock Idles low. For the AFE, this
means that there will be a rising edge before there is a
falling edge.
means that there will be a rising edge before there is a
falling edge.
FIGURE B-9:
DEVICE READ (SPI MODE 0,0 – CLOCK IDLES LOW)
FIGURE B-10: DEVICE WRITE (SPI MODE 0,0 – CLOCK IDLES LOW)
SCK
SDI
SDO
CS
R/W
A6 A5 A4 A3 A2 A1 A0
D7
D6 D5 D4 D3 D2 D1 D0
(ADDRESS) DATA
(ADDRESS + 1) DATA
D7
D6 D5 D4 D3 D2 D1
Data Transitions on
the Falling Edge
AFE Latches
Bits on the Rising Edge
D0
D7 OF (ADDRESS + 2) DATA
HI-Z
HI-Z
HI-Z
SCK
SDI
SDO
CS
R/W
A6 A5 A4 A3 A2 A1 A0
D7
D6 D5 D4 D3 D2 D1
D7
(ADDRESS) DATA
(ADDRESS + 1) DATA
D6 D5 D4 D3 D2 D1
D7 OF (ADDRESS + 2) DATA
D0
Data Transitions on
the Falling Edge
AFE Latches
Bits on the Rising Edge
D0
HI-Z
HI-Z
HI-Z