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ISL6422B Datasheet, PDF (14/18 Pages) Intersil Corporation – Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs
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ISL6422B
TABLE 14. CONTROL REGISTER SR4 CONFIGURATION
SR4H SR4M SR4L EN1
X
X VTOP1 VBOT1
FUNCTION
0
1
1
1
X
X
0
0 SR4 is selected
0
1
1
1
X
X
0
0 VSPEN1 = SELVTOP1 = 0, VOUT1 = 13V, VBOOST1 = 13V + VDROP
0
1
1
1
X
X
0
1 VSPEN1 = SELVTOP1 = 0, VOUT1 = 14V, VBOOST1 = 14V + VDROP
0
1
1
1
X
X
1
0 VSPEN1 = SELVTOP1 = 0, VOUT1 = 13V, VBOOST1 = 13V + VDROP
0
1
1
1
X
X
1
1 VSPEN1 = SELVTOP1 = 0, VOUT1 = 14V, VBOOST1 = 14V + VDROP
0
1
1
1
X
X
0
0 VSPEN1 = 0, SELVTOP1 = 1, VOUT1 = 18V, VBOOST1 = 18V + VDROP
0
1
1
1
X
X
0
1 VSPEN1 = 0, SELVTOP1 = 1, VOUT1 = 18V, VBOOST1 = 18V + VDROP
0
1
1
1
X
X
1
0 VSPEN1 = 0, SELVTOP1 = 1, VOUT1 = 19V, VBOOST1 = 19V + VDROP
0
1
1
1
X
X
1
1 VSPEN1 = 0, SELVTOP1 = 1, VOUT1 = 19V, VBOOST1 = 19V + VDROP
0
1
1
1
X
X
0
0 VSPEN1 = 1, SELVTOP1 = X VOUT1 = 13V, VBOOST1 = 13V + VDROP
0
1
1
1
X
X
0
1 VSPEN1 = 1, SELVTOP1 = X VOUT1 = 14V, VBOOST1 = 14V + VDROP
0
1
1
1
X
X
1
0 VSPEN1 = 1, SELVTOP1 = X VOUT1 = 18V, VBOOST1 = 18V + VDROP
0
1
1
1
X
X
1
1 VSPEN1 = 1, SELVTOP1 = X VOUT1 = 19V, VBOOST1 = 19V + VDROP
0
1
1
0
X
X
X
X PWM and Linear for Channel 1 disabled
NOTE: X indicates “Read Only” and is a “Don’t Care” for the Write mode.
SR5H
1
1
1
1
1
1
1
1
1
SR5M
0
0
0
0
0
0
0
0
0
SR5L
0
0
0
0
0
0
0
0
0
TABLE 15. STATUS REGISTER SR5 CONFIGURATION
X CABF2 OUVF2 OLF2 BCF2
FUNCTION
X
X
X
X
X SR5 is selected
X
X
X
0
X IOUT ≤ set limit, Normal Operation
X
X
X
1
X IOUT > Static/Dynamic Limiting Mode/Power blocks disabled
X
X
X
X
0 IOBCK ≤ set limit, Normal Operation
X
X
X
X
1 IOBCK > Dynamic Limiting Mode/Power blocks disabled
X
X
0
X
X VIN/VOUT within specified range
X
X
1
X
X VIN/VOUT is not within specified range
X
0
X
X
X Cable is connected, IO is > 20mA
X
1
X
X
X Cable is open, IO < 2mA
TABLE 16. TONE REGISTER SR6 CONFIGURATION
SR6H SR6M SR6L ENT2 MSEL2 TTH2
X
X
FUNCTION
1
0
1
X
X
X
X
X SR2 is selected
1
0
1
0
0
X
X
X Int Tone = 22kHz, modulated by EXTM2 , tr, tf = 10µs typ
1
0
1
0
1
X
X
X Ext 22k modulated input, tr, tf = 10µs typ
1
0
1
1
0
X
X
X Int Tone = 22kHz, modulated by ENT2 bit, tr, tf = 10µs typ
1
0
1
X
X
0
X
X TXT2 = 0; Decoder Rx threshold is set at 200mV max
1
0
1
X
X
1
X
X TXT2 = 0; Decoder Tx threshold is set at 400mV min
NOTE: X indicates “Read Only” and is a “Don’t Care” for the Write mode.
14
FN6486.1
August 10, 2007
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