EM65101
128COM/160SEG 16 Gray Scale Level LCD Driver
7 Functional Description
7.1 MPU Interface
7.1.1 Reset Pin Description (RESB)
Hold the RESB at low for at least 40us after which the EM65101 accepts this reset
command.
RESB
T > 40uS
Figure 7-1 RESB Timing
7.1.2 Selection of Interface Type
The EM65101 transfers data through the 8-bit parallel I/O (D7-D0) or serial data input
(SDA, SCL). You can use the P/S pin to select the parallel or serial interface. When the
serial interface is selected, you are allowed to write data but data reading is not
allowed.
P/S I/F Type CSB
RS
RDB
WRB
M86
SDA
SCL
Data
H
L
Parallel
Serial
CSB
CSB
RS
RS
RDB
-
WRB
-
M86
-
-
-
D7~D0
-
SDA
SCL
7.1.3 Parallel Input
When the parallel interface is selected with the P/S pin, the EM65101 allows data to be
transferred in parallel to an 8-bit MPU through the data bus. For the 8-bit MPU, you can
use the M86 pin to select either the 80-family or the 68-family MPU interface.
M86
H
MPU Type
CSB
CSB
CSB
RS
RS
RS
RDB
E
WRB
R/WB
WRB
Data
68-family MPU
80-family MPU
D7~D0
D7~D0
L
RDB
7.1.4 Read/Write Functions of the Register and Display RAM
The EM65101 have four read/write functions in parallel interface mode. Each
read/write function is selected by combinations of RS, RDB, and WRB signals.
80-family
68-family
R/WB
RS
Function
RDB
WRB
1
1
0
1
Read internal Register
1
0
0
1
1
0
0
1
Write internal Register
Read display data
0
0
1
0
Write display data
Product Specification (V0.4) 08.15.2005
• 13
(This specification is subject to change without further notice)
ELAN [ ELAN MICROELECTRONICS CORP ]
