UG-2828GDEDF11 Datasheet, PDF (15/26 Pages) List of Unclassifed Manufacturers – Product Specification

WiseChip Semiconductor Inc.
4. Functional Specification
4.1 Commands
Refer to the Technical Manual for the SSD1351
Doc. No: SAS1-0D038-A
4.2 Power down and Power up Sequence
To protect OEL panel and extend the panel life time, the driver IC power up/down routine should include
a delay period between high voltage and low voltage power sources during turn on/off. It gives the
OEL panel enough time to complete the action of charge and discharge before/after the operation.
4.2.1 Power up Sequence:
1. Power up V_CI / V_DDIO
2. Send Display off command
3. Initialization
4. Clear Screen
5. Power up V_CC
6. Delay 200ms
(When V_CC is stable)
7. Send Display on command
4.2.2 Power down Sequence:
1. Send Display off command
2. Power down V_CC
3. Delay 100ms
(When V_CC is reach 0 and panel is completely
discharges)
4. Power down V_CI / V_DDIO
VCC
VCI/VDDIO
VSS/Ground
VCC
VCI/VDDIO
VSS/Ground
VCI / VDDIO on
VCC on
Display on
Display off
VCC off
VCI / VDDIO off
Note 9:
1) Since an ESD protection circuit is connected between V_CI, V_DDIO and V_CC inside the driver IC, V_CC
becomes lower than V_CI whenever V_DD, V_DDIO is ON and V_CC is OFF.
2) V_CC should be kept float (disable) when it is OFF.
3) Power Pins (V_DD, V_DDIO, V_CC) can never be pulled to ground under any circumstance.
4) V_CI, V_DDIO should not be power down before V_CC power down.
4.3 Reset Circuit
When RES# input is low, the chip is initialized with the following status:
1. Display is OFF
2. 128(RGB)×128 Display Mode
3. Normal segment and display data column and row address mapping (SEG0 mapped to column
address 00h and COM0 mapped to row address 00h)
4. Display start line is set at display RAM address 0
5. Column address counter is set at 0
6. Normal scan direction of the COM outputs
7. Command A2h, B1h, B3h, BBh, BEh are locked by command FDh
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4D Systems Pty Ltd
12
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