EM65570 ELAN Microelectronics Corp, EM65570 Datasheet - Page 23

• Manufacturer Part Number: EM65570
• Description: 68com / 98seg 65k Color Stn Lcd Driver
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 09.05.2005
(This specification is subject to change without further notice)
7.1.3 Parallel Input
transferred in parallel to an 8-bit/16-bit MPU through the data bus. For the 8-bit/16-bit
MPU, you can use the M86 pin to select either the 80-family or the 68-family MPU
interface.
7.1.4 Read/Write Functions of Register and Display RAM
The EM65570 have four read/write functions in parallel interface mode. Each
read/write function is selected with the combinations of RS, RDB, and WRB signals.
7.1.5 Serial Interface
The EM65570 has two types of serial interfaces, i.e, 3-wire and 4-wire serial interfaces.
Use the SMODE pin to select the serial interface type.
„ SMODE = “L”: 4-wire serial interface
„ SMODE = “H”: 3-wire serial interface
7.1.5.1 4-Wire Type Serial Interface
When the chip select is active (CSB = “L”), the 4-wire type serial interface works
through the SDA and SCL input pins
internal shift register and counter are reset to the initial condition
input sequentially in the order of D7 to D0 at the rising edge of the serial clock (SCL).
The RS pin determines whether serial data input (SDA) is used as display RAM data or
as control register data.
„ RS = “L”: display RAM data
„ RS = “H”: control register data
When the parallel interface is selected with the P/S pin, the EM65570 allows data to be
M86
RS
H
L
1
1
0
0
68-family MPU
80-family MPU
MPU Type
68-Family
R/WB
1
0
1
0
CSB
CSB
CSB
RDB
0
1
0
1
.
80-Family
When chip select is inactive (CSB = “H”), the
68COM/ 98SEG 65K Color STN LCD Driver
RS
RS
RS
RDB
1
0
1
0
RDB
RDB
E
Read internal Register
Write internal Register
Read display data
Write display data
R/WB
WRB
WRB
.
Serial data SDA are
Function
D7~D0 (D15~D0)
D0~D7 (D15~D0)
Data
EM65570
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