MCP3461RT-ESLASHST datasheet(74/118 Pages) MICROCHIP

74 / 118 page

MCP3461/2/4R

DS20006404C-page 74

 2020-2021 Microchip Technology Inc.

If the CMD[1:0] bits are equal to ‘01’, the command

type is Static Read. In this case, the register address

defined in the COMMAND byte is read continuously.

The Address Pointer is automatically incremented.

Continuously clocking SCK while CS stays logic low

will continuously read the same register. Reading

another register is only possible by aborting the current

communication sequence by raising CS and issuing

another command.

In both Static and Incremental modes, the registers

are updated after each register read is fully performed.

If the value of the register changes internally during

the read, it will only be updated after the end of the

read. The value of each register is latched in the SDO

Output Shift register at the first rising edge of SCK of

each individual register reading. Figure 6-7 shows the

bit by bit details of a single register Read communica-

tion. Figure 6-8 shows the examples of Static and

Incremental Read communications.

FIGURE 6-7:

Single Read SPI Communication (Static or Incremental Read).

SPI Mode 1,1; Example with a 24-Bit Wide Register Located at Address CMD<5:2>

SPI Mode 0,0 ; Example with a 24-Bit Wide Register Located at Address CMD<5:2>

Don’t Care

SCK

SDI

SDO

DATA<23>

High-Z

Device Latches SDI on Rising Edge

Device Latches SDO on Falling Edge

High-Z

Don’t Care

SCK

SDI

SDO

DATA<0>

High-Z

Device Latches SDI on Rising Edge

Device Latches SDO on Falling Edge

A<6>

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