Datasheet TM1637 (Titan Micro Electronics) - 4

LED Drive Control Special Circuit
TM1637
2
、
Write SRAM data in address auto increment 1 mode.
stop CLK DIO Command1 Command2 Data1 DataN Command3 start start stop ACK ACK ACK ACK start ACK

Command1: Set data Command2: Set address Data1~N: Transfer display data Command3: Control display
3
、
Write SRAM data in a fixed address mode
stop stop CLK DIO Command1 Command2 Data1 Command2 DataN Command3 start start start ACK ACK ACK stop start stop ACK ACK ACK

Command1：Set data Command2：Set data Data1~N: Transfer display data Command3: Control display
Data command
Command is used to set the display mode and the LED driver status. The first byte input from DIO at CLK failing edge acts as a command. The highest B7 and B6 bytes after decoding are used to distinguish different commands.
B7 B6 Command
0 1 Data command setting 1 0 Display and control command setting 1 1 Address command setting When STOP command is sent during command or data transfer, serial communication is initialized and command or data transferring becomes invalid (Command or data transferred before remain effective.).
1
、
Data command setting
This command is to set data write and data read. 01 and 11 are not permitted to set for B1 and B0 bits.
MSB LSB B7 B6 B5 B4 B3 B2 B1 B0 Function Description
Write data to display 0 1 0 0 Data write and read register Zero should mode setting 0 1 1 0 Read key scan data be inserted 0 1 for 0 Address adding Automatic address adding 0 1 irrelevant 1 mode setting Fix address items. 0 1 0 Test mode setting Normal mode 0 1 1 (for internal) Test mode

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