S6B0755 Datasheet, PDF (17/68 Pages) Samsung semiconductor – 128 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD

128 SEG / 65 COM DRIVER & CONTROLLER FOR STN LCD
PRELIMINARY SPEC. VER. 1.0
S6B0755
3 Pin-SPI Interface (PS0 = "L" , PS1 = "L")
To write data to the DDRAM, send Data Direction Command in 3-Pin SPI mode. Data is latched at the rising edge
of SCLK. And the DDRAM column address pointer will be increased by one automatically.
CS1B
0
SCLK
23 0 1 7 8 15 0
829 830 831
3 Byte (1)
2 Byte (2)
128 Byte
SID
Page
MSB
LSB
DDC
Data In
No. of
DATA
(1) Set Page and Column Address.
Set Page Address
: 1 0 1 1 P3 P2 P1 P0
Set Column Address MSB
: 0 0 0 1 0 Y6 Y5 Y4
Set Column Address LSB
: 0 0 0 0 Y3 Y2 Y1 Y0
(2) Set DDC(Data Direction Command) and No. of Data Bytes.
Set Data Direction Command( For SPI mode Only):
1 1 1 0 1 0 00
Set No. of Data Bytes(DDL)
: D7 D6 D5 D4 D3D2D1D0
Figure 4. 3 Pin SPI Timing (RS is not used)
This command is used in 3-Pin SPI mode only. It will be two continuous commands, the first byte controls the data
direction and informs the LCD driver the second byte will be number of data bytes will be write. After these two
commands sending out, the following messages will be data. If data is stopped in transmitting, it is not valid data.
New data will be transferred serially with most significant bit first.
Notes:
l In spite of transmission of data, if CS1B will be disable, state terminates abnormally. Next state is
initialized.
l DDL Register value “0” à “1” , “127” à “128”. (decimal value)
Busy Flag
The Busy Flag indicates whether the S6B0755 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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