S6B0721X01-XXX0 查看數據表（PDF） - Samsung

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S6B0721X01-XXX0

132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD

Samsung 

132 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD

PRELIMINARY SPEC. VER. 0.1

S6B0721

Serial Interface (PS = "L")

When the S6B0721 is active, serial data (DB7) and serial clock (DB6) inputs are enabled. And not active, the

internal 8-bit shift register and the 3-bit counter are reset. Serial data can be read on the rising edge of serial clock

going into DB6 and processed as 8-bit parallel data on the eighth serial clock. Serial data input is display data

when RS is high and control data when RS is low. Since the clock signal (DB6) is easy to be affected by the

external noise caused by the line length, the operation check on the actual machine is recommended.

CS1B

CS2

SID

SCLK

RS

DB7 DB6 DB5

DB4 DB3 DB2 DB1

DB0 DB7 DB6

Figure 3. Serial Interface Timing

Busy Flag

The Busy Flag indicates whether the S6B0721 is operating or not. When DB7 is “H” in read status operation, this

device is in busy status and will accept only read status instruction. If the cycle time is correct, the microprocessor

needs not to check this flag before each instruction, which improves the MPU performance.

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