LTC3207-1_15 Datasheet, PDF (11/20 Pages) Linear Technology – 600mA Universal Multi-Output LED/CAM Driver

LTC3207/LTC3207-1
OPERATION
The LTC3207/LTC3207-1 are receive-only (slave) devices. _{Sub-Address Byte}
There are two I²C addresses available. The LTC3207 I²C
address is 00110110 and the LTC3207-1 I²C address is
00110100. The I²C address is the only difference between
the LTC3207 and the LTC3207-1.
MSB
LSB
7 6 5 4 3 2 1 0 Register Function
X X X X 0 0 0 0 REG0 COMMAND
X X X X 0 0 0 1 REG1 ULED1
Write Word Protocol Used by the LTC3207/LTC3207-1
1
7
11
8
1
8
11
S Slave Address Wr A *Sub-Address A Data Byte A P**
S = Start Condition, Wr = Write Bit = 0, A = Acknowledge,
P = Stop Condition
*The sub-address uses only the first four bits, D0, D1, D2 and D3
**Stop can be delayed until all of the data registers have been written
X X X X 0 0 1 0 REG2
X X X X 0 0 1 1 REG3
X X X X 0 1 0 0 REG4
X X X X 0 1 0 1 REG5
X X X X 0 1 1 0 REG6
X X X X 0 1 1 1 REG7
X X X X 1 0 0 0 REG8
ULED2
ULED3
ULED4
ULED5
ULED6
ULED7
ULED8
Bus Speed
The I²C port is designed to be operated at speeds of up
to 400kHz. It has built-in timing delays to ensure correct
operation when addressed from an I²C compliant master
device. It also contains input filters designed to suppress
glitches should the bus become corrupt.
X X X X 1 0 0 1 REG9 ULED9
X X X X 1 0 1 0 REG10 ULED10
X X X X 1 0 1 1 REG11 ULED11
X X X X 1 1 0 0 REG12 ULED12
X X X X 1 1 0 1 REG13 CAM
X X X X 1 1 1 0 REG14 ENU
X X X X 1 1 1 1 REG15 G/B/ENU
LTC3207
00
ADDRESS
1101
WR
10
SUB-ADDRESS
S7 S6 S5 S4 S3 S2 S1 S0
DATA BYTE
76543210
LTC3207-1
00
ADDRESS
1101
WR
00
START
STOP
SDA
0 0 1 1 0 1 1 0 ACK S7 S6 S5 S4 S3 S2 S1 S0 ACK 7 6 5 4 3 2 1 0 ACK
SCL
1 2 3 4 5 6 7 8 9 1 2 3 4 5 6 7 89 1 2 3 4 5 6 7 8 9
3207 FO2
Figure 2. Bit Assignments
SDA
t_LOW
t_{SU, DAT}
SCL
t_{HD, STA}
START
CONDITION
t_HIGH
t_r
t_f
t_{HD, DAT}
t_{SU, STA}
t_{HD, STA}
t_SP
REPEATED START
CONDITION
Figure 3. Timing Parameters
t_BUF
t_{SU, STO}
3207 F03
STOP
CONDITION
START
CONDITION
3207fc
11