MAX14912 Datasheet, PDF (23/30 Pages) Maxim Integrated Products – Low Power and Heat Dissipation

MAX14912/MAX14913
Octal High-Speed, High-Side
Switch/Push-Pull Driver
Direct SPI Serial Interface: 16-Bit Mode
SRIAL = High, CMND = Low, S16 = High
Figure 9 shows a 16-bit read/write cycle that reads the
per-channel diagnostic data and configures/sets the outputs
in a single 16-bit cycle.
The data returned on SDO is the per-channel fault status.
The CNFG pin is used to select whether the input bits sent
to SDI set the output level or the output mode (high-side
or push-pull). Moreover, in 16-bit mode, the open-load
detection can be enabled on a per-channel basis.
Table 5. 8-Bit SPI Direct Mode Bit
Definition
BIT BIT VALUE CNFG
DEFINITION
0
Low
In high-side mode: set HS off
In push-pull mode: HS off, LS on
In high-side mode: set HS switch on
D_
1
Low In push-pull mode: set HS switch
on, LS off
0
High Configure high-side mode
1
High Configure push-pull mode
0
F_
1
X No fault
X
Fault (thermal protection or open
load
Table 6. 16-Bit SPI Direct Mode Bit
Definition
BIT BIT VALUE CNFG
DEFINITION
D_
0
Low
In high-side mode: HS off, LS off
In push-pull mode: HS off, LS on
1
Low HS on, LS off
0
Low High-side mode
C_
1
Low Push-pull mode
High-side mode; open-load detection
00
High _{defined by OL/IN1 pin}
D_C_
01
High Push-pull mode
10
High High-side mode with open-load detection
11
High Not used
0
F_
1
X No fault
Fault status (thermal protection or open-
X _load)
L_
0
X Output level < 7V
1
X Output level > 7V
CS
CLK
SDI
D8 D7 D6 D5 D4 D3 D2 D1 C8 C7 C6 C5 C4 C3 C2 C1
SDO
F8 F7
F6 F5
F4
F3 F2
F1
L8
L7
L6
L5 L4
L3
L2 L1
Figure 9. SPI Cycle in 16-Bit Direct SPI Mode
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