MAX14913 datasheet(22/30 Pages) MAXIM

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Daisy-Chain SPI Operation

The device supports daisy-chain operation, allowing control/

monitoring of multiple MAX14912/MAX14913 devices

from a single serial interface with one common chip-select

signal. The identical data that is clocked into SDI, is

clocked out of SDO with a one SPI cycle delay. This is

illustrated in Figure 8.

Direct SPI Serial Interface: 8-bit Mode

SRIAL = high, CMND = low, S16 = low.

Figure 9 shows an 8-bit cycle that reads the per-channel

diagnostic data and sets/configures the outputs in a single

8-bit cycle. Table 5 illustrates the meaning of the SPI bits.

The data returned on SDO is the per-channel fault status.

Pin CNFG is used to select whether the SDI input bits set

the output level or the output mode (high-side or push-

pull).

Figure 7. Daisy-Chain Connection

Figure 8. SPI Cycle in 8-Bit Direct SPI Mode

F I F O - I C 3

D A T A - I C 3

D I A G - I C 3

SDO

F I F O - I C 2

D A T A - I C 2

D I A G - I C 2

SDO

F I F O - I C 1

D A T A - I C 1

D I A G - I C 1

SDO

MAX

MAX14913

14912/

MAX

MAX14913

14912/

MAX

MAX14913

14912/

MCU

SDI

CLK

MOSI

MISO

SDI

CLK

SDI

CLK

SDI

SDO

MAX14912/MAX14913

Octal High-Speed, High-Side

Switch/Push-Pull Driver

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