ISL6422 Datasheet, PDF (13/19 Pages) Intersil Corporation – Dual Output LNB Supply and Control Voltage Regulator with I2C Interface for Advanced Satellite Set-Top Box Designs

ISL6422
TABLE 6. CONTROL REGISTER 4 (SR4)
R, W R, W R, W R, W R, W R, W R, W R, W
SR4H SR4M SR4L EN1 X
X VTOP1 VBOT1
TABLE 9. COMMAND REGISTER 7 (SR7)
R, W R, W R, W R, W R, W R, W R, W R, W
SR7H SR7M SR7L DCL2 VSPEN2 ISEL2R ISEL2H ISEL2L
TABLE 7. STATUS REGISTER 5 (SR5)
R, W R, W R, W X
R
R
R
R
SR5H SR5M SR5L X CABF2 OUVF2 OLF2 BCF2
TABLE 8. TONE REGISTER 6 (SR6)
R, W R, W R, W R, W R, W R, W R, W
SR6H SR6M SR6L ENT2 MSEL2 TTH2 X
R, W
X
TABLE 10. CONTROL REGISTER 8 (SR8)
R, W R, W R, W R, W R, W R, W R, W R, W
SR8H SR8M SR8L EN2 X
X VTOP2 VBOT2
Transmitted Data (I²C bus WRITE mode)
When the R/W bit in the chip is set to 0, the main
microprocessor can write on the system registers (SR1
through SR8) of the ISL6422 via I²C bus. These will be
written by the microprocessor as shown below. The spare
bits of registers can be used for other functions.
TABLE 11. STATUS REGISTER SR1 CONFIGURATION
SR1H SR1M SR1L OTF CABF1 OUVF1 OLF1 BCF1
FUNCTION
0
0
0
X
X
X
X
X SR1 is selected
0
0
0
X
X
X
0
X I_OUT ≤set limit, Normal Operation
0
0
0
X
X
X
1
X I_OUT >Static / Dynamic Limiting Mode/Power blocks disabled
0
0
0
X
X
X
X
0 I_OBCK ≤set limit, Normal Operation
0
0
0
X
X
X
X
1 I_OBCK >Dynamic Limiting Mode/Power blocks disabled
0
0
0
X
X
0
X
X V_IN/V_OUT within specified range
0
0
0
X
X
1
X
X V_IN/V_OUT is not within specified range
0
0
0
X
0
X
X
X Cable is connected, Io is >20mA
0
0
0
X
1
X
X
X Cable is open, Io <2mA
0
0
0
0
X
X
X
X
0
0
0
1
X
X
X
X
NOTE: X indicates “Read Only” and is a “Don’t Care” for the Write mode.
T_J ≤130°C, Normal operation
T_J >150°C, Power blocks disabled
TABLE 12. TONE REGISTER SR2 CONFIGURATION
SR2H SR2M SR2L ENT1 MSEL1 TTH1
X
X
FUNCTION
0
0
1
X
X
X
X
X SR2 is selected
0
0
1
0
0
X
X
X Internal Tone = 22kHz, modulated by EXTM1, T_r, T_f = 10µs typ
0
0
1
0
1
X
X
X Ext 22K modulated input, T_r, T_f = 10µs typ
0
0
1
1
0
X
X
X Internal Tone = 22kHz, modulated by the ENT1 bit, T_r, T_f = 10µs typ
0
0
1
X
X
0
X
X TXT = 0; Decoder Rx threshold is set at 200mV max
0
0
1
X
X
1
X
X TXT = 0; Decoder Tx threshold is set at 400mV min
NOTE: X is a “Don’t Care” for the Write mode.
13
FN9190.1
April 10, 2007