Datasheet

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TPS23841
SLUS745A – NOVEMBER 2006 – REVISED MAY 2007
Table 5. Common Control Write, Register Select = 0001
BIT FUNCTION STATE PRESET
STATE
D7 Unused 0 0
D6 Unused 0 0
D5 Thermal shutdown fault
(1)
0 = active 0
1 = disable
D4 AC high 0 = off 0
1 = AC_HI driver on
D3 AC low 0 = off 0
1 = AC_LO driver on
D2 Port over/under voltage faults 0 = disable 0
1 = active
D1 All ports disable
(2)
0 = normal operation 0
1 = all ports shut down (no ramp)
D0 Software RESET 0 = normal operation 0
1 = reset all circuits and start a POR timing cycle
(1) Register 0001, bit D5 operation inhibited after device probe.
(2) Consult factory for alternative B, semi-auto mode implementations which write to bit D1.
Table 6. Port Control Write 1, Register Select = 0010 (One Per Port)
BIT FUNCTION STATE PRESET
STATE
D7 Unused 0 0
D6 Unused 0 0
0 = normal operation
D5 Discovery fault disable 0
1 = disable internal discovery fault limits (19 k Ω to 29.5 k Ω )
0 = DC Disconnect active
D4 DC Disconnect disable 0
1 = DC Disconnect disable (for AC Disconnect)
D3 Function Bit 3 0000 = Disable function (power down and reset all functions)
0001 = Discovery 1 function
D2 Function Bit 2
0010 = Discovery 2 function
D1 Function Bit 1
0011 = port voltage sample function (V sample)
0100 = legacy detection function
0101 = classification function
0110 = ramp up/power function (rup pwr)
0111 = continuous sample function C Sample)
0000
1000 = ramp power down function R
DWN
)
1001 = ac low
D0 Function Bit 0
1010 = ac high
1011 = port current sample function (I sample)
1100 = die temperature sample function (T sample)
1101 = spare
1110 = spare
1111 = spare
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