Datasheet

 2012-2013 Microchip Technology Inc. DS20002286B-page 45
MCP3911
6.6 SPI MODE 0,0 – Clock Idle Low,
Read/Write Examples
In this SPI mode, SCK idles low. For the MCP3911, this
means that there is a rising edge on SCK before there
is a falling edge.
FIGURE 6-4: Device Read (SPI Mode 0,0 – SCK Idles Low).
FIGURE 6-5: Device Write (SPI Mode 0,0 – SCK 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
MCU and MCP3911 Latch
Bits on the Rising Edge
D0
D7 OF (ADDRESS + 2) DATA
HI-Z
HI-Z
HI-Z
SCK
SDI
SDO
CS
R/WA6 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
MCU and MCP3911 Latch
Bits on the Rising Edge
D0
HI-Z
HI-Z
HI-Z