isl6422b Intersil Corporation, isl6422b Datasheet - Page 13

• 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

Transmitted Data (
When the R/W bit in the chip is set to 0, the main
microprocessor can write on the system registers (SR1 thru
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.
SR1H
SR2H
SR3H
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
SR1M
SR2M
SR3M
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
1
1
1
1
SR1L
SR2L
SR3L
0
0
0
0
0
0
0
0
0
0
0
1
1
1
1
1
1
0
0
0
0
0
0
0
0
0
0
I
2
C
bus WRITE mode)
DCL1
ENT1
OTF
13
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
0
0
1
X
X
0
0
0
0
0
1
0
VSPEN1 ISEL1R ISEL1H ISEL1L
CABF1 OUVF1
MSEL1
TABLE 13. COMMAND REGISTER SR3 CONFIGURATION
X
X
X
X
X
X
X
X
X
X
X
X
0
1
0
1
0
X
X
X
X
X
X
X
X
0
1
TABLE 11. STATUS REGISTER SR1 CONFIGURATION
TABLE 12. TONE REGISTER SR2 CONFIGURATION
TTH1
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
0
1
X
0
1
1
1
1
X
X
X
X
OLF1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
0
0
1
1
ISL6422B
BCF1
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
X
0
1
X
X
0
1
0
1
X
X
X
SR8) of the ISL6422B via I
the microprocessor as shown below. The spare bits of
registers can be used for other functions.
SR1 is selected
I
I
I
I
V
V
Cable is connected, I
Cable is open, I
T
T
SR2 is selected
Int Tone = 22kHz, modulated by EXTM , t
Ext 22k modulated input, t
Int Tone = 22kHz, modulated by ENT bit, t
TXT = 0; Decoder Rx threshold is set at 200mV max
TXT = 0; Decoder Tx threshold is set at 400mV min
SR3 is selected
I
I
I
I
I
Dynamic current limit NOT selected
Dynamic current limit selected
SELVTOP H/W pin Enabled
SELVTOP H/W pin Disabled
OUT
OUT
OBCK
OBCK
OUT1
OUT1
OUT1
OUT1
OUT1
IN
IN
J
J
≤ +130°C, Normal operation
> +150°C, Power blocks disabled
/V
/V
≤ set limit, Normal Operation
> Static/Dynamic Limiting Mode/Power blocks disabled
OUT
OUT
limit threshold = 305mA typ
limit threshold = 388mA typ
limit threshold = 570mA typ
limit threshold = 705mA typ
limit threshold = 890mA typ
≤ set limit, Normal Operation
> Dynamic Limiting Mode/Power blocks disabled
within specified range
is not within specified range
O
< 2mA
O
is > 20mA
r
, t
FUNCTION
FUNCTION
FUNCTION
f
2
= 10µs typ
C bus. These will be written by
r
, t
r
, t
f
= 10µs typ
f
= 10µs typ
August 10, 2007
FN6486.1