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- Raymond Allen, Ph.D., E.E.
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- Key Features
- Propeller microcontroller at 80 MHz
- QVGA LCD Display (320x240xRGB)
- USB connectivity (and optional power)
- Full size SD card interface
- Stereo audio output with headphone driver
- 3-Axis MEMS accelerometer
- 8 free Propeller pins
- 8-bit DAC output and 8-bit ADC input
- 2.5” x 3.8” board size with 3” x 2” mounting
holes for 4-40 hardware
- Low Cost: $145 MSRP, $95
Introductory Price, $79 Expo Price !!!
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4
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5
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6
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7
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8
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9
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10
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- Any free space around the board was turned into a prototyping area
- All holes with square pads are ground.
- Holes with a white circle on the stenciled side of the board are
special. One white circle
hole is 3.3 V from the FTDI chip, the other is directly connected to the
5.1 mm barrel power supply connector.
- Holes in the lower left corner (by the pushbutton) with a white line
between them on the stenciled side are connected together.
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- LCD interface in 8-bit 8086 mode
- Can specify color in 16 or 24 bits (but only 18 bits actually used)
- Note: Front panel pushbutton
to ground with simple 10k pullup on dedicated pin
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- Drivers can be grouped into buffered or unbuffered modes
- In buffered mode, a representation of the entire screen is stored in HUB
RAM
- Use 16-bit mode
- PSM Graphics Demo
- PSM TV Text
- In unbuffered mode, routines write directly to LCD
- Use 24-bit mode
- PSM Serial Control
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- Save 12kB of RAM using PSM!
- Can increase resolution from 256x192 to 320x240!
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- Uses Clemens’ “Secret Font” (8x12) for 40x20 text (up
from 40x13 with TV_Text )
- Driver continuously updates screen
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- Mounts to PSM and provides:
- Rechargeable battery power with two AA cells
- Video, keyboard and mouse
(see Prop Video!)
- RTC with Lithium backup
- Enough 5V power to drive a servo
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Notes
