MAX14912 Datasheet, PDF (22/30 Pages) Maxim Integrated Products – Low Power and Heat Dissipation

MAX14912/MAX14913
Octal High-Speed, High-Side
Switch/Push-Pull Driver
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).
CLK
MOSI
MCU
CS
MISO
CLK
DATA- I C1
SDI _{F I F O - I C 1} SDO
DI AG- I C1
CS
MAX14912/
MAX14913
Figure 7. Daisy-Chain Connection
CS
CLK
DATA- I C2
SDI _{F I F O - I C 2} SDO
DI AG- I C2
CS
MAX14912/
MAX14913
CLK
DATA- I C3
SDI _{F I F O - I C 3} SDO
DI AG- I C3
CS
MAX14912/
MAX14913
CLK
SDI
D8
D7
D6
D5
D4
D3
D2
D1
SDO
F8
F7
F6
F5
F4
F3
F2
F1
Figure 8. SPI Cycle in 8-Bit Direct SPI Mode
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