HM17CM256 HYNIX [Hynix Semiconductor], HM17CM256 Datasheet - Page 19

• Manufacturer Part Number: HM17CM256
• Description: 128XRGBX82 OUTPUT LCD DRIVER IC with built-in RAM
• Manufacturer: HYNIX [Hynix Semiconductor]

(6) DDRAM addressing
(8bit 128) and 82bit of Y direction.
4 grays, respectively.
color (8gray 8gray 4gray).
is 0
display data. And so, 128x82 dot gray display or 384 x 82 B/W mode display is possible.
description at command function.)
the address on non-effective area and it is forbidden to set address on outside area in each case.
independently with X, Y address counters.
cycle and this data comes out from display latch at falling edge of CL signal.
per one frame cycle and the address is counted up with synchronized CL input.
Display RAM is accessed with X address and Y address from CPU by 8 bit or 16 bit unit.
X address and Y address can be increased automatically by setting status of control register.
The address is increased per every read and write of display RAM by CPU. ( Please see detail
X direction is selected by X address and Y direction is selected by Y address. Please do not set
384bit display data of Y direction are read out to display latch at rising edge of CL signal per 1 line
Display start line address register is preset to line counter at “H” state of FLM signal which changes
This IC includes display memory
In gray mode, neighboring 3-bit data or 2-bit data are displayed by segment driver with 8 grays or
3 outputs of segment driver compose 1 pixel of RGB and 128 82 pixels are displayed with 256
Address area of X direction is varied according to accessed data length. The area of X direction
In the Black & white mode, the MSBs of 3 bit and 2 bit corresponding with RGB are used to
Display line address counter is synchronized by timing signals of LCD driver, and it operates
8BIT access
16 BIT access
H
~7F
Y-address
Y-address
H
at 8bit access mode and 0
51
51
0
0
H
H
H
H
8bit
8bit
0
H
16bit
16bit
0
H
8bit
8bit
1
H
H
~3F
Bit mapped that is composed of 1024 bit of X direction
H
at 16bit access mode.
X-address
X-address
7E
8bit
8bit
H
HM17CM256
16bit
16bit
3F
7F
8bit
8bit
H
H
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