MCP3302/04

DS21697B-page 24

 2002 Microchip Technology Inc.

FIGURE 7-2:

Communication with MCP3302/04 (MSB first Format).

FIGURE 7-3:

Communication with MCP3302/04 (LSB first Format).

CS

CLK

D1

D2

D0

HI-Z

Don’t Care

Null

Bit

B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 *

HI-Z

SGL/

DIFF

Start

D2

SGL/

DIFF

Start

* After completing the data transfer, if further clocks are applied with CS low, the A/D Converter will output LSB

first data, followed by zeros indefinitely. See Figure 7-3 below.

a high impedance node, leaving the CLK running to clock out the LSB-first data or zeros.

SB†

Null

Bit

B11 B10 B9 B8 B7 B6 B5 B4 B3 B2 B1 B0 B1 B2 B3 B4 B5 B6 B7 B8 B9 B10 B11

CS

CLK

HI-Z

HI-Z

(MSB)

Power Down

Start

SGL/

DIFF

D0

D1

D2

* After completing the data transfer, if further clocks are applied with CS low, the A/D Converter will output zeros

indefinitely.

a high impedance node, leaving the CLK running to clock out LSB first data or zeroes.

Don’t Care

SB†

SB*