Datasheet

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TPS23841
SLUS745A – NOVEMBER 2006 – REVISED MAY 2007
Table 7. Port Control Write 2, Register Select = 0011 (One Per Port)
BIT FUNCTION STATE PRESET
STATE
D7 Unused 0 0
D6 Unused 0 0
D5 Unused 0 0
D4 Port Enable
(1)
0 = normal 0
1 = port disable
D3 A/D Start 0 = normal 0
1 = start A/D (self clearing)
D2 A/D Abort 0 = normal 0
1 = abort
D1 Unused 0 0
D0 Unused 0 0
(1) Consult factory for alternative B, semi-auto mode implementations which write to bit D4.
Table 8. Port Status Read 1, Register Select = 0100 (One Per Port)
BIT FUNCTION STATE PRESET
STATE
0 = normal
D7 Discovery Status 0
1 = discovery fail
0 = normal
D6 Function Done Bit 0
1 = function complete (self clearing by a new function write)
D5 Port Class 000 = class 0
001 = class 1
D4 Port Class
010 = class 2 000
011 = class 3
D3 Port Class
100 = class 4
D2 Fault status (MSB) 000 = no faults
001 = UV/OV fault
D1 Fault status
010 = thermal shutdown fault (TSD)
011 = overload current > 50-ms fault
000
100 = load disconnect
D0 Fault status (LSB)
101 = reserved for future
110 = reserved for future
111 = reserved for future
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