MCP3901A2T-ISLASHSS datasheet(34/60 Pages) MICROCHIP

34 / 60 page

MCP3901

DS22192A-page 34

FIGURE 6-2:

Device Read (SPI Mode 1,1 - Clock Idles High).

FIGURE 6-3:

Device Write (SPI Mode 1,1 - Clock Idles High).

6.6

SPI MODE 0,0 - Clock Idle Low,

Read/Write Examples

In this SPI mode, the clock idles low. For the MCP3901

this means that there will be a rising edge before there

is a falling edge.

FIGURE 6-4:

Device Read (SPI Mode 0,0 - Clock Idles Low).

SCK

SDI

SDO

A6 A5

A4 A3 A2 A1 A0

D6 D5

D4 D3 D2 D1

(ADDRESS) DATA

(ADDRESS + 1) DATA

D6 D5

D4 D3 D2 D1

Data Transitions on

the Falling Edge

MCU and MCP3901 Latch

Bits on the Rising Edge

HI-Z

R/W

HI-Z

SCK

SDI

SDO

R/W

A6 A5

A4 A3 A2 A1

D5 D4 D3 D2

(ADDRESS) DATA

(ADDRESS + 1) DATA

D6 D5

D4 D3 D2

Data Transitions on

the Falling Edge

MCU and MCP3901 Latch

Bits on the Rising Edge

HI-Z

SCK

SDI

SDO

R/W

A6 A5

A4 A3 A2 A1 A0

D6 D5

D4 D3 D2 D1

(ADDRESS) DATA

(ADDRESS + 1) DATA

D6 D5

D4 D3 D2 D1

Data Transitions on

the Falling Edge

MCU and MCP3901 Latch

Bits on the Rising Edge

D7 OF (ADDRESS + 2) DATA

HI-Z

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