LM3561TMX National Semiconductor Corporation, LM3561TMX Datasheet - Page 24

• Manufacturer Part Number: LM3561TMX
• Description: Synchronous Boost Converter With 600ma High Side Led Driver And I2c-compatible Interface
• Manufacturer: National Semiconductor Corporation

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GPIO REGISTER (ADDRESS 0x20)
The GPIO register contains the control bits which change the state of the TX1/TORCH/GPIO1 pin and the TX2/GPIO2 pin to general
purpose I/O’s (GPIO’s).
VIN MONITOR REGISTER (ADDRESS 0X80)
The VIN Monitor Register controls the on/off state of the VIN Monitor comparator as well as selects the 4 programmable thresholds.
TORCH BRIGHTNESS REGISTER (0XA0)
The Torch Brightness Register contains the bits to program the LED current in Torch Mode.
Bit 7
Not Used
N/A
N/A
Bits [7:3]
Not Used
N/A
Bit 6
TX2/GPIO2/
INT Interrupt
Output
0 = INT mode
is disabled
(default)
1 = When TX2/
GPIO2 is
configured as
a GPIO output
TX2/GPIO2/
INT is set for
INT mode and
will pull low
when either
the LED
Thermal Fault
Flag is set or
the VIN
Monitor Flag is
set
Bits [7:3]
Not Used
Bit 5
TX2/GPIO2
data
This bit is the
read or write
data for TX2/
GPIO2 in
GPIO mode
(default is 0)
TABLE 6. Torch Brightness Register Bit Settings
TABLE 5. VIN Monitor Register Bit Settings
TABLE 4. GPIO Register Bit Settings
Bit 4
TX2/GPIO2
data direction
0 = TX2/
GPIO2 is a
GPIO Input
(default)
1 = TX2/
GPIO2 is a
GPIO Output
00 = 2.9V threshold (V
Default
01=3.0V threshold (V
10 = 3.1V threshold (V
11 = 3.2V threshold (V
VIN Monitor Threshold Settings
24
Bit 3
TX2/GPIO2
Control
0 = TX2/
GPIO2 is a
flash interrupt
input (default)
1 = TX2/
GPIO2 is
configured as
a GPIO
Bits [2:0]
Torch Current Settings
000 = 18mA
001 = 36.8mA
010 = 55.6mA (default)
011 = 74.4mA
100 = 93.2mA
101 = 112mA
110 = 130.8mA
111 = 149.6mA
Bits [2:1]
IN
IN
IN
IN
falling)
Bit 2
TX1/GPIO1
data
This bit is the
read or write
data for TX1/
GPIO1 in
GPIO mode
(default is 0)
falling)
falling)
falling)
0 = VIN Monitor Comparator is
disabled (default)
1 = VIN Monitor Comparator is
enabled.
Bit 1
TX1/GPIO1
data direction
0 = TX1/
GPIO1 is a
GPIO input
(default)
1 = TX1/
GPIO1 is a
GPIO output
VIN Monitor Enable
Bit 0
Bit 0
TX1/GPIO1
Control
0 = TX1/
GPIO1 is
configured as
flash interrupt
input(default)
1 = TX1/
GPIO1 is
configured as
a GPIO