EM65571 ELAN Microelectronics Corp, EM65571 Datasheet - Page 24

• Manufacturer Part Number: EM65571
• Description: 130com / 128seg 65k Color Stn Lcd Driver
• Manufacturer: ELAN Microelectronics Corp

EM65571
130COM/128SEG 65K Color STN LCD Driver
18 x
7.1.3 Parallel Input
7.1.4 Read/Write Functions of the Registers and Display RAM
7.1.5 Serial Interface
7.1.6 4-wire Serial Interface
transferred in parallel to an 8-bit/16-bit MPU through the data bus. For the
8-bit/16-bit MPU, either the 80-family MPU interface or the 68-family MPU interface
can be selected with the M86 pin.
The EM65571 has four read/write functions during parallel interface mode. Each
read/write function is selected by combinations of RS, RDB and WRB signals.
interface; the other one is a 4-wire type serial interface. The choice whether 3-wire
or 4-wire is determined by the SMODE pin.
SMODE = “L”: 4-wires serial interface
SMODE = “H”: 3-wires serial interface
through the SDA and SCL input pins. When chip select is inactive (CSB = “H”), the
internal shift register and counter are reset to the initial condition. Serial data SDA
is input sequentially in the order from D7 to D0 at the rising edge of the serial clock
(SCL) and is converted into 8-bit parallel data (by serial to parallel conversion) at
the rising edge of the 8th serial clock, processed in accordance with the data. The
identification whether serial data input (SDA), display data or control register data
is determined by input to the RS pin.
RS = “L” : display RAM data
RS = “H” : control register data
When parallel interface is selected with the P/S pin, the EM65571 allows data to be
The EM65571 has two types of serial interface. One is a 3-wire type serial
When chip select is active (CSB = “L”), 4-wire type serial interface can work
M86
H
L
RS
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
(This specification is subject to change without further notice)
80-family
RS
RS
RS
WRB
1
0
1
0
Product Specification (V1.0) 08.04.2005
RDB
RDB
E
R/WB
WRB
WRB
Read internal Register
Write internal Register
Read display data
Write display data
Function
D7~D0 (D15~D0)
D0~D7 (D15~D0)
Data