CAP1126 datasheet(17/73 Pages) MICROCHIP

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 2015 Microchip Technology Inc.

DS00001623B-page 17

CAP1126

4.6.2

SET ADDRESS POINTER

The Set Address Pointer command sets the Address pointer for subsequent reads and writes of data. The pointer is set

on the rising edge of the final data bit. At the same time, the data that is to be read is fetched and loaded into the internal

output buffer but is not transmitted.

4.6.3

WRITE DATA

The Write Data protocol updates the contents of the register referenced by the address pointer. As the command is pro-

cessed, the data to be read is fetched and loaded into the internal output buffer but not transmitted. Then, the register

is updated with the data to be written. Finally, the address pointer is incremented.

FIGURE 4-4:

SPI Reset Interface Command - Normal Mode

FIGURE 4-5:

SPI Set Address Pointer Command - Normal Mode

Master SPDOUT

SPI_MOSI

SPI_CS#

SPI_CLK

Reset - 7Ah

Invalid register data

00h – Internal Data buffer empty

SPI_MISO

Master Drives

Slave Drives

‘0’

‘1’

‘0’

‘1’

‘0’

‘1’

‘0’

‘1’

‘0’

Master SPDOUT

SPI_MOSI

SPI_CS#

SPI_CLK

Set Address Pointer – 7Dh

Unknown, Invalid Data

SPI_MISO

Master Drives

Slave Drives

Address pointer set

‘0’

‘1’

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