em65570sagh ELAN Microelectronics Corp, em65570sagh Datasheet - Page 27

• Manufacturer Part Number: em65570sagh
• Description: 68com/98seg 65k Color Stn Lcd Drivers
• Manufacturer: ELAN Microelectronics Corp

Product Specification (V1.0) 04.18.2006
(This specification is subject to change without further notice)
7.5 Fast Burst RAM Write Function
7.6 Common Output Mode Selection
The EM65570S has built-in fast burst RAM write function, because the burst mode
transfer which transfers 32-bits data block at once, so it can decrease half the access
time needed for common standard RAM write function (16 bits data bus). The burst
RAM write function is suitable for frequently data rewriting such as displaying color
animation.
The EM65570S has two common output modes. You can select the correct common
output mode to fit LCM ITO layout type. The common output mode can select by ‘CSL’
pin option.
CSL=”0”: COM0, COM1, COM2, … , COM65, COM66, COM67
CSL=”1”: COM0, COM2, … , COM66 & COM1, COM3, … , COM67
EM65570
Fast Burst RAM Write Function is used effectively only in horizontal RAM data writing
mode, that is, RDWS[2]=0
EM65573S
0x00H
2 bytes
Internal Buffer 1
0x01H
Figure 7-6 Burst RAM Write Operation
0x02H
Microcontroller
2 bytes
Display RAM
0x03H
68COM/98SEG 65K Color STN LCD Drivers
NOTE
databus [0:15]
databus [0:31]
.......
Internal Buffer 2
EM65570S
x 21