TB2104F

2002-10-30

4

· In T-BUS mode, start data transmission with the LS terminal (period) set at “L” level.

Thereafter, send address data 8 bits, display data 20 bits, and chip select code 4 bits, synchronizing with rise

of CLK signal.

· After sending data, set the LS terminal to “L” level again and terminate the data sending.

· On a driver IC when chip select code agrees with chip select code by AD1 / AD2, display data are updated at

fall of LS signal.

· When increasing driver ICs, it is possible to connect up to 8 ICs on the same bus line in combination with

AD1 / AD2.

· T-BUS address of the TB2104F is “D4H”.

· When data are transferred using T-BUS address “00H”, the data can be input to all the driver ICs on the

bus line independently of chip select codes (“0H”~“7H”). (This function can be used for power on reset.)

3. AD1 / AD2 input and chip select codes

AD1 / AD2 input are 3-value level inputs and 9 kinds (3×3) of codes can be set.

AD1

AD2

A

B

C

Chip Select Code

Mode

1

1

1

“7H”

0

1

1

“6H”

1

0

1

“5H”

0

0

1

“4H”

T

-BUS

—

—

—

—

Serial

1

1

0

“3H”

0

1

0

“2H”

1

0

0

“1H”

0

0

0

“0H”

T

-BUS

4. Example of extension of driver ICs in T-BUS mode chip select code