EM65168 ELAN Microelectronics Corp, EM65168 Datasheet - Page 12

• Manufacturer Part Number: EM65168
• Description: 80 Com/seg Lcd Driver
• Manufacturer: ELAN Microelectronics Corp

EM65168
80 COM/SEG LCD Driver
8 •
The LCD RAM can be read or written via control signal. When #RAMEN pin is at low
state, the RAM can be read or written in data. The RAMADS can be set as RAMD [7:4]
to be used as address bus or data bus. When it is used as Address and in 4-bit mode,
the #RAMEN pin should remain low and user needs to set three times Address as
RAMD [3:0] by following the Address setting sequence: Address [11:8] (a11, a10, a9,
a8), Address [7:4] (a7, a6, a5, a4), and Address [3:0] (a3, a2, a1. a0). If the Address
bus is in 8-bit mode, user needs to set two times Address as RAMD [7:0] by following
the Address setting sequence: Address [10:8] (x, x, x, x, x, a10, a9, a8), Address [7:0]
(a7, a6, a5, a4, a3, a2, a1. a0).
When it is used as Data bus, the #RAMEN pin is at high state, user can read or write a
single data or continuously read or write multiple data. When reading or writing data to
the RAM, the Address is incremented by 1, and once #RAMEN pin is at a high state,
user cannot read or write to RAM.
MAIN
1
1
1
1
Relationship between FOSC, LOAD and FR Frequency
RAM Control
M1
0
0
1
1
M0
0
1
0
1
64 common (1/64 duty)
80 common (1/80 duty)
48 common (1/48 duty)
32 common (1/32 duty)
Description
(This specification is subject to change without further notice)
24kHz
24kHz
24kHz
24kHz
f
OSC
Product Specification (V1.0) 04.26.2006
f
f
f
f
OSC
OSC
OSC
OSC
LOAD
/10=2.4K LOAD/32=75.0 Hz
/5=4.8K LOAD/64=75.0 Hz
/4=6.0K LOAD/80=75.0 Hz
/7=3.4K LOAD/48=71.4 Hz
FR