VBWV1 is a display driver board launched by HP. It is equipped with an Epson display controller with 80K bytes of embedded SRAM. It can drive active matrix TFT/TFD and passive single and dual scan displays, with a maximum resolution of 640x480. It supports 1/2/4/8 bits of color depth, 640x480 resolution at 2bpp, 640x240 resolution at 4bpp, and 320x240 resolution at 8bpp. It supports 3.3V and 5V panel power, RS232, RS485, I2C, and SPI interfaces. The board has an LCD VEE voltage generator that can adjust the contrast. The board has 128K bytes of E2prom for image storage (32K standard). It has a built-in character set that supports 8x8 and 8x16 characters. It supports foreground and background color attributes, and direct write and character write modes. It supports block transfer of graphics data from E2 memory to display memory. It supports storing the display controller set-up registers register and look up table in the microcontroller's internal E2 memory, which enables automatic display initialization on power up. The board has an in-circuit programmable microcontroller with flash storage for easy updates and customization (directly interfaced to MPLAB ICD via CN2).
The VBWV1 is a display driver board designed for evaluating small to medium monochrome and colour LCDs via a low‑cost serial interface. It supports active matrix TFT/TFD and passive single or dual‑scan displays up to 640 × 480 resolution, with colour depths from 1 to 8 bpp and up to 16 shades of grey on monochrome panels.
The guide details hardware connections (RS‑232, optional RS‑485, I²C, SPI), power options (3.3 V/5 V panel support, LCD VEE generation), on‑board memory (up to 128 KB E²PROM, 80 KB SRAM), and the full command set used for graphics, character, and memory operations, including packet framing with STX/ETX bytes.
| Depth | 14 mm max |
|---|---|
| Embedded SRAM | 80 KB |
| Maximum resolution | 640 × 480 |
| Colour depth support | 1/2/4/8 bpp |
| Panel voltage support | 3.3 V and 5 V |
| Interface options | RS232, optional RS485, I²C, SPI |
| On‑board E²PROM | up to 128 KB (32 KB standard) |
The board provides an RS‑232 interface and optional RS‑485, I²C, and SPI connections.
Data packets are framed with a start byte STX (02h) and an end byte pair ETX ETX (03h 03h).
Yes, a hardware portrait mode provides a direct 90‑degree rotation of the display image.