SMH4046 Datasheet, PDF (26/51 Pages) List of Unclassifed Manufacturers – Hot-Swap, Active DC Output Control (ADOCTM) Power Manager with I2C lnterface

SMH4046
Preliminary Information
CONFIGURATION REGISTERS (CONTINUED)
Register R04 – Over-Current Configuration.
Bit D[7] and D[5] are unused. Bit D[6] controls if OC causes an IRQ and D[4] controls if OC causes a FAULT. Bits
D[3:0] control the overcurrent Delay.
Register R04
D7 D6 D5 D4 D3 D2 D1 D0
Action
0
-
-
-
-
-
-
- ^Unused
-
0
-
-
-
-
-
- ^{OC does not cause an IRQ}
-
1
-
-
-
-
-
- ^{OC causes an IRQ}
-
-
0
-
-
-
-
- ^Unused
-
-
-
0
-
-
-
- ^{OC does not cause a FAULT}
-
-
-
1
-
-
-
- ^{OC causes a FAULT}
-
-
-
-
0
0
0
0 ^{Minimum Overcurrent Delay = 5.5µs, 1LSB=3µs}
-
-
-
-
1
1
1
1 ^{Maximum Overcurrent Delay = 50.5µs}
Register R05 – Overcurrent configuration and fault latch.
Bits D[7:6] control the VDD differential level that causes an OC. Bits D[5:4] control the VCC3 differential level that
causes an OC. Bit D[3] controls the 5V OC detection. Bit D[2] controls the 3V OC detection. Bit D[1] controls the
FAULT output latch and D[0] is unused.
Register R05
D7 D6 D5 D4 D3 D2 D1 D0
Action
0
0
-
-
-
-
-
-
50mV differential between VDD and CARD5V
causes OC
0
1
-
-
-
-
-
-
100mV differential between VDD and CARD5V
causes OC
1
0
-
-
-
-
-
-
150mV differential between VDD and CARD5V
causes OC
1
1
-
-
-
-
-
-
250mV differential between VDD and CARD5V
causes OC
-
-
0
0
-
-
-
- 50mV differential between VCC3 and CARD3V
causes OC
-
-
0
1
-
-
-
- 100mV differential between VCC3 and CARD3V
causes OC
-
-
1
0
-
-
-
- 150mV differential between VCC3 and CARD3V
causes OC
-
-
1
1
-
-
-
- 250mV differential between VCC3 and CARD3V
causes OC
-
-
-
-
0
-
-
- OC detection on 5V channel OFF
-
-
-
-
1
-
-
- OC detection on 5V channel ON
-
-
-
-
-
0
-
- OC detection on 3V channel OFF
-
-
-
-
-
1
-
- OC detection on 3V channel ON
-
-
-
-
-
-
0
- Fault output is unlatched
-
-
-
-
-
-
1
- Fault output is latched
-
-
-
-
-
-
-
0 ^Unused
Summit Microelectronics, Inc
2082 1.7 08/23/04
26