MAX14912 Datasheet, PDF (25/30 Pages) Maxim Integrated Products – Low Power and Heat Dissipation

MAX14912/MAX14913
Octal High-Speed, High-Side
Switch/Push-Pull Driver
Table 8. COMMAND MODE Protocol
COMMAND
NO.
FUNCTION
SDI
COMMAND
DATA
Set OUT State
0
(Reg 0)
Z0000000 DDDDDDDD
(Note 15)
1
Set HS/PP Mode
(Reg 1) (Note 16)
Z0000001
DDDDDDDD
SDO
VALID ON NEXT
CYCLE
FFFFFFFF.LLLLLLLL
FFFFFFFF.LLLLLLLL
COMMENT
D = 0 : HS off; LS on (in PP)
D = 1 : HS on; LS off
L: Output Level
F: Fault (Real-Time)¹²
Z = 1: Clear Fault Registers¹³
D = 0 : HS Mode
D = 1 : PP Mode
2
Set OL Detection
(Reg 2) (Note 16)
Z0000010
DDDDDDDD
FFFFFFFF.LLLLLLLL
D = 0 : OL Detection Off
D = 1 : OL Detection On (HS Mode)
3
Set Configuration
(Reg 3) (Note 16)
Z0000011
0000JJAB
FFFFFFFF.LLLLLLLL
AB: Watchdog 00 = 0.90s 01 = 0.45s
10 = 0.15s J = 1: Channels are
Coupled (PP Disabled)
NNN = 0,1,2,3: Q = Reg value, A = 0
4
Read Register
(Note 14)
Z0100000
00000NNN
AAAAAAAA.QQQQQQQQ
NNN = 4,5,6: Q = Reg value, A =
Real_time
NNN = 7: Q = 0, A = Real_time
5
Read Real-Time
Status (Note 12)
Z0110000
—
FFFFFFFF.LLLLLLLL
F-L Status Readout (Real-Time).
No Data is Written
Note 12: F bits are the logical OR of thermal protection and open-load detection real-time signals.
Note 13: Any fault bit inside registers 4, 5, and 6 are set as soon as its corresponding event happens. All fault registers are cleared
only by setting Z = 1 (this is possible during any command cycle). The registers get cleared at CS rising edge. If Z = 1 the
registers are not cleared in case of SPI communication error (CRC, 8-CK).
If SRIAL = 1 and CMND = 1, the Z bit clears also the FAULT IRQ signal.
Note 14: The Q bits are the value of the fault registers (that need to be cleared by means of the Z bit).
The A bits are the corresponding real-time values (i.e., the real-time fault signals). The real-time values are stretched by
200ms. Therefore, they have a time resolution of ~200ms.
Note 15: In parallel setting mode (SRIAL = low), writing to this registers does not change the real-time values or settings. These
can only be changed through pins.
Note 16: For the MAX14913 only, in parallel setting mode (SRIAL = low), writing to these registers does not change the configuration.
www.maximintegrated.com
Maxim Integrated │  25