LTC3207-1_15 Datasheet, PDF (13/20 Pages) Linear Technology – 600mA Universal Multi-Output LED/CAM Driver

OPERATION
REG13, Camera
LED 4-bit high and 4-bit low DAC data.
Register Sub-Address = 1101
MSB
HIGH BITS
LSB
MSB
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
D3
D2
D1
D0
D3
REG14, ENU
Setting bit high selects the outputs to be controlled by ENU.
Register Sub-Address = 1110
MSB
Bit 7
Bit 6
Bit 5
ULED8
ULED7
ULED6
Bit 4
ULED5
Bit 3
ULED4
LTC3207/LTC3207-1
LOW BITS
LSB
Bit 2
Bit 1
Bit 0
D2
D1
D0
Bit 2
ULED3
Bit 1
ULED2
LSB
Bit 0
ULED1
REG15, ENU, Gradation and Blink Times
Setting bits 0 high to 3 high selects the outputs to be
controlled by ENU. Bits 4 to 7 control gradation and
blink times.
Register Sub-Address = 1111
ENU Output Selection
3
2
1
ULED12 ULED11 ULED10
LSB
0
ULED9
Sub-Address = 1111
Blink Times and Period
D7
D6
Blink
0
0
0.625s
0
1
0.156s
1
0
0.625s
1
1
0.156s
Period
1.25s
1.25s
2.5s
2.5s
Gradation Ramp Times and Period
D5
D4
Ramp
Period
0
0
Disabled
Disabled
0
1
0.24s
0.45s
1
0
0.48s
0.9s
1
1
0.96s
1.8s
START and STOP Conditions
A bus-master signals the beginning of a communication
to a slave device by transmitting a START condition.
A START condition is generated by transitioning SDA
from high to low while SCL is high. When the master has
finished communicating with the slave, it issues a STOP
condition by transitioning SDA from low to high while
SCL is high. The bus is then free for communication with
another I²C device.
Byte Format
Each byte sent to the LTC3207/LTC3207-1 must be 8 bits
long followed by an extra clock cycle for the Acknowledge
bit to be returned by the LTC3207/LTC3207-1. The data
should be sent to the device most significant bit (MSB)
first.
3207fc
13