EM65568 ELAN Microelectronics Corp, EM65568 Datasheet - Page 22

• Manufacturer Part Number: EM65568
• Description: 130 Com/ 128 Seg 4096 Color Stn Lcd Driver
• Manufacturer: ELAN Microelectronics Corp

After completing 8-bit data transferring, or when making no access, be sure to set serial clock input (SCL) to “L”. Cares of
SDA and SCL signals against external noise should be taken in board writing. To prevent transfer error due to external noise,
release chip select (CSB = “H”) every completion of 8-bit data transferring.
7.1.6 3 Wires Type Serial Interface
When chip select is active (CSB = “L”), 3-wires type serial interface can work through the SDA and SCL input pins. When
chip select is inactive (CSB = “H”), the internal shift register and counter are reset in the initial condition. Serial data SDA are
input sequentially in order of RS, D7 to D0 at the rising edge of serial clock (SCL) and are converter into 9-bit parallel data (by
serial to parallel conversion) at the rising edge of the 9
are display data or control register data is determined by first serial input data (RS) and SPOL pin as followed.
After completing 9-bits data transferring, or when making no access, be sure to set serial clock input (SCL) to “L”. Cares of
SDA and SCL signals against external noise should be taken in board wiring. To prevent transfer error due to external noise,
release chip select (CSB = “H”) every completion of 9-bit data transferring.
7.1.7 Chip Select Connection in Serial Interface Mode
When serial interface use in 2 chips EM65568 system; one is a Master another is a slave, both EM65568 can control by only
one chip select signal.
* This specification is subject to be changed without notice.
RS = “L”: display RAM data
RS = “H”: control register data
CSB
SDA
CSB
SDA
SCL
SCL
RS
RS
0
1
RS
1
1
D7
Display RAM/Register
Control Register Data
D7
2
Display RAM Data
D6
2
SPOL = “0”
D6
Figure 5. 3-Wires Type Serial Interface
3
Figure 4. 4-Wires type Serial Interface
D5
3
th
D5
serial clock. The identification whether the serial data inputs (SDA)
4
130 COM/ 128 SEG 4096 Color STN LCD Driver
D4
4
22
D4
5
RS
D3
5
0
1
D3
6
Display RAM/Register
D2
6
Control Register Data
Display RAM Data
7
D2
SPOL = “1”
D1
7
8
D1
D0
8
D0
9
2005/3/8 (V1.2)
EM65568