Description:
The EB-OSD-232+™ evaluation board accelerates the evaluation of the OSD-232+ on-screen composite video character and graphic overlay module. The EB-OSD-232+™ includes an on-board 28 pin DIP socket, 5 volt regulator, DC power jack, power switch, power status LED, dip switches, female DB-9 RS-232 serial jack, and for future enhancements momentary push buttons and I2C eeprom socket.
The EB-OSD-232+™ evaluation board also includes a Windows PC based demonstration utility for the OSD-232+™, 6’ PC RS-232 serial cable, and wall power supply.
Specifications:
- Dimensions: 3.00" L x 3.94” W x .7" H
- Weight: 2.1 oz. (with OSD-232+™ module installed)
- Input voltage: 7.0 to 14.0 volts DC (200 ma max)
- DC connector: 2.1 mm x 5.5 mm, center tip positive
- Video connectors: RCA
- RS-232 connector: Female DB-9
- Pin 2 - OSD-232+™ serial out
- Pin 3 - OSD-232+™ serial in
- Pin 5 - Ground
- RS-232 serial or TTL input: 9,600 or 19,200 baud, 8 data bits, 1 stop bit, inverted data
- Operating temperature: -40C to +85C (extended temperature range standard)
OSD-232+™ Installation
It is very important the OSD-232+™ module is inserted into the 28 pin DIP socket of the EB-OSD-232+™ board in the proper orientation. Pin 1 of the OSD-232+™ module is near the white square on the top left corner of the board. Pin 1 of the EB-OSD-232+™ 28 pin DIP socket is indicated with a notch on the top of the socket.
Dip Switches:
DIP switch inputs are only checked during power-up.
| DIP # | Description |
| 1 | RS-232 baud rate OFF = 9,600 baud ON = 19,200 baud |
| 2 | NTSC or PAL video format OFF = NTSC ON = PAL |
| 3 | Display font screen OFF = Do nothing ON = Display font screen |
| 4 | Firmware flash update OFF = Do nothing ON = Enter OSD-232+™ firmware flash update |
Jumpers:
All OSD-232+™ jumper pins are TTL levels (0 and +5 VDC)
Jumper: JP5| Pin # | OSD-232+™ Input / Output | Label | Description |
| 1 | Output | CTS | RS-232 clear to send (future enhancement) |
| 2 | N/A | GND | RS-232 ground |
| 3 | Input | RTS | RS-232 request to send (future enhancement) |
Jumper: JP6
Reserved (pins 1 - 6)
Jumper: JP7
| Pin # | OSD-232+™ Input / Output | Label | Description |
| 1 | Input + Output | GPIO 0 | General purpose I/O (future enhancement) |
| 2 | Input + Output | GPIO 1 | General purpose I/O (future enhancement) |
| 3 | N/A | GND | Ground |
| 4 | Output | VSYNC | Vertical sync output of video input Low = video vertical sync interval High = not video vertical sync interval |
| 5 | Output | HSYNC | Horizontal sync output of video input Low = video horizontal sync interval High = not video horizontal sync interval |
| 6 | Output | LOS | Loss of sync of video input Low = video present on input High = no video present on input |
Schematic:
Trouble Shooting Tips:
| Problem | Solution |
| Green LED off (unit won’t power up) |
|
| Garbage characters on screen or text not displayed |
|