THL3512 Datasheet, PDF (8/16 Pages) THine Electronics, Inc. – The THL3512 is an LED driver with 24 channel opendrain

THL3512_Rev.1.02_E
Serial Communication Protocol
2-pair serial LVDS input or 3-wire serial CMOS level input is selected as a serial interface for register setting by the
MODE pin. The 2-pair serial LVDS input and 3-wire serial CMOS level input share input pins (SCL_INp/SCL_INn,
SDA_INp/SDA_INn) which are used as 2-pair serial LVDS input when the MODE pin is set to low, and used as 3-wire
serial CMOS level input when the MODE pin is set to high.
- The serial interface is clock synchronous and used only for writing to registers (one-way communication).
- The data length is 8-bit in MSB first bit order. As for how to recognize the first bit, please refer to the section “2-pair
serial LVDS input” and “3-wire serial CMOS level input”.
- The first 8 bits that includes the first bit is defined as “1st byte” and the next 8 bits as “2nd byte” and so on.
- “1st Byte” is assigned to the device address. If device address is set to 00h, all the devices are selected to be written
except the device which has a device address 00111111 by the A5-A0 pins.
- “2nd Byte” is assigned to the register address.
- The bytes after “3rd Byte” is assigned to register values to write. The register address is incremented every time 8-bit
register value is written. For example, the value of “3rd Byte” is written to the register at the address indicated in “2nd
byte“, and the value of “4th byte” is written to the register at the address (“2nd byte“+1).
- Don’t write except the registers R00-R18
< Serial Data >
1st Byte
2nd Byte
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0 Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Device Address
The first bit
3rd Byte
Register Address
Last Byte
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Bit7 Bit6 Bit5 Bit4 Bit3 Bit2 Bit1 Bit0
Register Value
Register Value
Device Address Setting
The lower 6 bits out of 8-bit serial interface device address are set by the A0-A5 pin.The higher 2 bits are fixed at 00.
For example,
in case A5=Low, A4=Low, A3=Low, A2=Low, A1=Low, A0=High,
the device address is set to 00000001 (01h).
- If the A0-A5 pins are all set to high, the register of the device can not be written. Please set all the A0-A5 pins to high
in order to use only 2-pair to 2-pair repeater function or 3-wire to 2-pair bridge function without using LED driver out-
puts.
- Since the device address 00000000 (00h) is the one to be used for writing to all devices, basically don’t use it.
- Please set device addresses within the range from 00000001 (01h) to 00111110 (3Eh).
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