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SMH4814 Datasheet, PDF (33/44 Pages) Summit Microelectronics, Inc. – Dual Feed Active-ORing Programmable Hot Swap Controller
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CONFIGURATION REGISTERS (CONTINUED)
SMH4814
Preliminary Information
Register R05 – Pull-downs, Pull-ups, current regulation and fault latch.
Bits D[7:6] control the fast pull down level by the number of diodes connected in series with the gate pull-down
transistor of the Quick Trip sensor. Bits D[5:4] control the GATEA/GATEB Pull-up Current. Bit D[3] controls the
Current Regulation. Bit D[2] controls the Fault Latches Off versus Duty Cycle. Bits D[1:0] control the Drain Sense
Glitch Filter.
Register R05
D7 D6 D5 D4 D3 D2 D1 D0
Action
Fast pull down level - no diodes connected in series
0
0
-
-
-
-
-
- with the gate pull-down transistor of the Quick Trip
sensor.
Fast pull down level –1 diode connected in series
0
1
-
-
-
-
-
- with the gate pull-down transistor of the Quick Trip
sensor.
Fast pull down level - 2 diodes connected in series
1
0
-
-
-
-
-
- with the gate pull-down transistor of the Quick Trip
sensor.
Fast pull down level – 3 diodes connected in series
1
1
-
-
-
-
-
- with the gate pull-down transistor of the Quick Trip
sensor.
-
-
0
0
-
-
-
- VGATEA/VGATEB Pull-up Current 10µa
-
-
0
1
-
-
-
- VGATEA/VGATEB Pull-up Current 50µa
-
-
1
0
-
-
-
- VGATEA/VGATEB Pull-up Current 100µa
-
-
1
1
-
-
-
- VGATEA/VGATEB Pull-up Current 200µa)
-
-
-
-
0
-
-
- Enable Current regulation.
-
-
-
-
1
-
-
- Disable Current regulation.
-
-
-
-
-
0
-
- Fault condition must be manually cleared
-
-
-
-
-
1
-
- Fault cleared after Duty cycle timeout
-
-
-
-
-
-
0
0 Drain Sense Glitch Filter is 1µs.
-
-
-
-
-
-
0
1 Drain Sense Glitch Filter is 14µs.
-
-
-
-
-
-
1
0 Drain Sense Glitch Filter is 40µs.
-
-
-
-
-
-
1
1 Drain Sense Glitch Filter is 119µs.
Summit Microelectronics, Inc
2080 2.0 07/21/05
33
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