PMODOLED_RM Datasheet, PDF (1/2 Pages) List of Unclassifed Manufacturers – PmodOLED™ Reference Manuall

PmodOLED™ Reference Manual
Revision: October 19, 2011
Note: This document applies to REV A of the board.
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Overview
The PmodOLED features an SPI-controlled
monochrome OLED display, perfect for
embedded applications requiring small,
complex visual output.
Features include:
• a 128x32 pixel 0.9’’ WiseChip/Univision
UG-23832HSWEG04 OLED graphic
display panel
• standard SPI interface
• clock speeds of up to 10MHz
• internal display buffer
Functional Description
The PmodOLED uses a standard 12-pin
connector to display output on a 128x32 pixel
organic LED (OLED) panel. The graphic
display panel uses the Solomon Systech
SSD1306 display controller.
An SPI interface is used to configure the
display, as well as to send the bitmap data to
the device.
The PmodOLED displays the last image drawn
on the screen until it is powered down or a new
image is drawn to the display. Refreshing and
updating is handled internally.
Power Supply
The PmodOLED has two field-effect transistors
(FETs) that control the display’s two power
supplies. The VDDC control toggles the power
to the logic of the display. The VBATC control
toggles the power to the OLED display itself.
These two pins have pull-up resistors that turn
off their respective power supplies when
they’re not being driven. These pins are
configured as outputs and driven low to turn on
the power supply.
The PmodOLED has a particular power-
on/power-off sequence that must be followed
to prolong the life of the display.
Power-on sequence:
1. Apply power to VDD.
2. Send Display Off command.
3. Initialize display to desired operating mode.
4. Clear screen.
5. Apply power to VBAT.
6. Delay 100ms.
7. Send Display On command.
Power-off sequence:
1. Send Display Off command.
2. Power off VBAT.
3. Delay 100ms.
4. Power off VDD.
Doc: 502-222
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