EM65571 ELAN Microelectronics Corp, EM65571 Datasheet - Page 28
EM65571
Manufacturer Part Number
EM65571
Description
130com / 128seg 65k Color Stn Lcd Driver
Manufacturer
ELAN Microelectronics Corp
Datasheet
1.EM65571.pdf
(118 pages)
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EM65571
130COM/128SEG 65K Color STN LCD Driver
22 x
7.6 Display Start Address Register
7.7 Display RAM Addressing
This register determines the Y-address of the display RAM corresponding to the
display start line. The display RAM data addressed by the Display Start Address
register is output to the common driver start line. The actual common start line of the
LCD panel depends on the Display Start Common register and the SHIFT bit of the
Display Control register. The registers are preset every time the FLM signal varies in
the display line counter. The line counter counts up when synchronized with the LP
input and generates line addresses which are read out sequentially as 384 bits of data
from display RAM to the LCD driver circuit.
The EM65571 has a built-in bit mapped display RAM. The display RAM consists of
2048 bits (16 bits*128) in the X-direction and 128 bits in the Y-direction. In the
gradation display mode, the EM65571 provides segment driver output for 48-gradation
display using 6 bits. The three outputs of the segment driver can be used for one pixel
of RGB. When connected to an STN color LCD panel, the EM65571 can display
128*128 pixels with 65K colors (48 gradation * 48 gradation * 48 gradation). The
address area in the X-direction depends on the access bus size. In the X-direction, the
X Address register is used to access; and in the Y-direction, the Y Address register is
EM65571
0x00H
2 bytes
Internal Buffer 1
0x01H
Figure 9. Burst RAM Write Operation
0x02H 0x03H
Microcontroller
Display RAM
2 bytes
(This specification is subject to change without further notice)
Databus [0:15]
Databus [0:31]
Internal Buffer 2
.......
Product Specification (V1.0) 08.04.2005
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