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A/D Results Registers (Discovery Current, Voltage, Current and Temperature)
TPS23841
SLUS745A – NOVEMBER 2006 – REVISED MAY 2007
Table 9. Port Status Read 2, Register Select = 0101 (One Per Port)
BIT FUNCTION STATE PRESET
STATE
D7 Unused 0 0
D6 Unused 0 0
D5 Unused 0 0
D4 0 = not active
Watch dog timer 0
1 = active
D3 0 = not active
A/D status 0
1 = active (conversion in process)
D2 Function status (MSB) 000 = disabled
001 = searching
D1 Function status
010 = power delivery
D0
011 = fault
000
100 = test
Function status (LSB)
101 = other fault
110 = undefined
111 = undefined
Table 10. Discovery Current — Lower Bits, Register Select = 0110 (One Per Port)
BIT FUNCTION STATE PRESET
STATE
D7 A/D bit 7 A/D lower bits 0
D6 A/D bit 6
D5 A/D bit 5
D4 A/D bit 4
D3 A/D bit 3
D2 A/D bit 2
D1 A/D bit 1
D0 A/D bit 0
Table 11. Discovery Current — Upper Bits, Register Select = 0111 (One Per Port)
BIT FUNCTION STATE PRESET
STATE
D7 Resistor measurement 0 = measurement active (bit set low at the start of Discovery 1 or Discovery 2) 0
complete 1 = measurement complete (bit set high after A/D is completed during Discovery 1 or
Discovery 2)
D6 A/D bit 14 A/D upper bits 0
D5 A/D bit 13
D4 A/D bit 12
D3 A/D bit 11
D2 A/D bit 10
D1 A/D bit 9
D0 A/D bit 8
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