Little Board/P5x Technical Manual
Most I/O connectors are shrouded dual-row male headers for use with flat ribbon (IDC) female connectors and ribbon cable. Ampro recommends that you use “center-bump polarized” connectors to prevent accidentally installing cables backwards. Use non-strain-relief connectors to stay within the vertical height envelope shown in Figure 2– 1.
If you use the recommended mating connectors, you can install retaining clips to secure a cable to its connector. (The connector heights of some brands do not allow the use of retaining clips.) Retaining clips are especially useful in high-vibration environments.
You can also design a PC board assembly, made with female connectors in the same relative positions as the Little Board’s connectors, to eliminate cables, meet packaging requirements, add EMI filtering, or customize your installation in other ways. Precise dimensions for locating connectors are provided in Figure 2– 1.
The ISA portion of the PC/104-Plusexpansion bus appears on connector J1 (A, B, C, D). You can expand the system with on-board MiniModule products or other PC/104-compliant expansion modules. These modules stack directly on the connectors, or use conventional or custom expansion hardware, including solutions available from Ampro.
The PCI portion of the PC/104-Plusexpansion bus appears on connector J21. It uses a 2 mm. 4-row connector called out in the PC/104-Plusdraft specification. Like the J1 connectors, J21 has both male and female connections, allowing for “stackthrough” assembly.
If you plan to use the on-board video controller with a flat-panel LCD screen requiring a Vee bias voltage supply, you can install Ampro’s optional LCD Bias Supply board on connector J4. This board can be jumpered to supply positive or negative Vee from ±15V to ±35V (adjustable). (Only certain LCD panels require an external Vee supply.)
