isl6422b Intersil Corporation, isl6422b Datasheet - Page 15

• Manufacturer Part Number: isl6422b
• Description: Dual Output Lnb Supply And Control Voltage Regulator With I2c Interface For Advanced Satellite Set-top Box Designs
• Manufacturer: Intersil Corporation

NOTE: X indicates “Read Only” and is a “Don’t Care” for the Write mode.
NOTE: X indicates “Read Only” and is a “Don’t Care” for the Write mode.
Received Data (
The ISL6422B can provide to the master a copy of the
system register information via the I
The read mode is Master activated by sending the chip
address with R/W bit set to 1. At the following Master
generated clock bits, the ISL6422B issues a byte on the
SDA data bus line (MSB transmitted first).
At the ninth clock bit the MCU master can:
• Acknowledge the reception, starting in this way the
• Not acknowledge, stopping the read mode
SR7H
SR8H
transmission of another byte from the ISL6422B.
communication.
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
SR8M
SR7M
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
SR8L
SR7L
I
2
1
1
1
1
1
1
1
1
1
1
1
1
1
1
C
0
0
0
0
0
0
0
0
0
0
bus READ MODE)
EN2
DCL2
1
1
1
1
1
1
1
1
1
1
1
1
1
0
15
X
X
X
0
0
0
0
0
1
0
VSPEN2 ISEL2R ISEL2H ISEL2L
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
2
C bus in read mode.
TABLE 17. COMMAND REGISTER SR7 CONFIGURATION
TABLE 18. CONTROL REGISTER SR8 CONFIGURATION
X
X
X
X
X
X
X
X
0
1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
1
1
1
X
X
X
X
VTOP2 VBOT2
0
0
0
1
1
0
0
1
1
0
0
1
1
X
X
X
X
X
X
X
0
0
1
1
ISL6422B
0
0
1
0
1
0
1
0
1
0
1
0
1
X
X
X
X
X
X
0
1
0
1
SR4 is selected
VSPEN2 = SELVTOP2 = 0, VOUT1 = 13V, VBOOST1 = 13V + VDROP
VSPEN2 = SELVTOP2 = 0, VOUT1 = 14V, VBOOST1 = 14V + VDROP
VSPEN2 = SELVTOP2 = 0, VOUT1 = 13V, VBOOST1 = 13V + VDROP
VSPEN2 = SELVTOP2 = 0, VOUT1 = 14V, VBOOST1 = 14V + VDROP
VSPEN2 = 0, SELVTOP2 = 1, VOUT1 = 18V, VBOOST1 = 18V + VDROP
VSPEN2 = 0, SELVTOP2 = 1, VOUT1 = 18V, VBOOST1 = 18V + VDROP
VSPEN2 = 0, SELVTOP2 = 1, VOUT1 = 19V, VBOOST1 = 19V + VDROP
VSPEN2 = 0, SELVTOP2 = 1, VOUT1 = 19V, VBOOST1 = 19V + VDROP
VSPEN2 = 1, SELVTOP2 = X VOUT1 = 13V, VBOOST1 = 13V + VDROP
VSPEN2 = 1, SELVTOP2 = X VOUT1 = 14V, VBOOST1 = 14V + VDROP
VSPEN2 = 1, SELVTOP2 = X VOUT1 = 18V, VBOOST1 = 18V + VDROP
VSPEN2 = 1, SELVTOP2 = X VOUT1 = 19V, VBOOST1 = 19V + VDROP
PWM and Linear for Channel 1 disabled
While the whole register is read back by the microprocessor,
the read-only bits, OUC1, OUC2 - Over or Undercurrent bit,
UV1, UV2 - Over or Undervoltage bit, TPR1, TPR2 - Tone
present bit, OTF - Over-temperature fault bit convey
diagnostic information about the ISL6422B.
Power–On I
The I
at power-on. The I
logic signal from the UVLO circuit. This signal will go HIGH
when chip power is OK. As long as this signal is LOW, the
interface will not respond to any I
system register SR1 and SR2 are initialized to all zeros, thus
SR7 is selected
IOUT1 limit threshold = 305mA typ
IOUT1 limit threshold = 388mA typ
IOUT1 limit threshold = 570mA typ
IOUT1 limit threshold = 705mA typ
IOUT1 limit threshold = 890mA typ
Dynamic current limit NOT selected
Dynamic current limit selected
SELVTOP H/W pin Enabled
SELVTOP H/W pin Disabled
2
C interface built into the ISL6422B is automatically reset
2
C Interface Reset
2
C interface block will receive a Power OK
FUNCTION
FUNCTION
2
C commands and the
August 10, 2007
FN6486.1