Datasheet

ManualsBrandsMICROCHIP TECHNOLOGY ManualsData collecting ICsData acquisition IC - Digital potentiometer linear Non-permanent SOIC 14

MCP413X/415X/423X/425X

6.2 The SPI Modes

The SPI module supports two (of the four) standard SPI

modes. These are Mode 0,0 and 1,1. The mode is

determined by the state of the SDI pin on the rising

edge of the 1st clock bit (of the 8-bit byte).

6.2.1 MODE 0,0

In Mode 0,0: SCK idle state = low (V

), data is clocked

in on the SDI pin on the rising edge of SCK and clocked

out on the SDO pin on the falling edge of SCK.

6.2.2 MODE 1,1

In Mode 1,1: SCK idle state = high (V

), data is

clocked in on the SDI pin on the rising edge of SCK and

clocked out on the SDO pin on the falling edge of SCK.

6.3 SPI Waveforms

Figure 6-3 through Figure 6-8 show the different SPI

command waveforms. Figure 6-3 and Figure 6-4 are

read and write commands. Figure 6-5 and Figure 6-6

are read commands when the SDI and SDO pins are

multiplexed on the same pin (SDI/SDO). Figure 6-7

and Figure 6-8 are increment and decrement

commands.

FIGURE 6-3: 16-Bit Commands (Write, Read) - SPI Waveform (Mode 1,1).

FIGURE 6-4: 16-Bit Commands (Write, Read) - SPI Waveform (Mode 0,0).

SCK

Write to

SSPBUF

SDI

Input

Sample

SDO

bit15 bit14 bit13 bit12 bit11 bit10 bit9 bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0

bit15 bit14 bit13 bit12 bit9 bit8 bit7 bit6 bit5 bit4 bit3 bit2 bit1 bit0

AD3 AD2 AD1 AD0

C1 C0

D8 D7 D6 D5 D4 D3 D2 D1 D0

CMDERR bit

IHH

(1)

Note 1: V

IHH

is supported for compability with the MCP414X/6X and MCP424X/6X devices high voltage

operation.

SCK