AMC 68VZ328 software manual LCD Interface, LCD Schematic

SPI

A standard SPI bus is included on the dimmPCITM. This SPI bus is located on the DIMM socket occupying pins 23-29 on both the A and B-sides. The SPI bus allows developers the opportu- nity to create their own DIMM socket cards containing SPI devices and the availability to interface these cards with the dimmPCITM. The SPI bus provides an easy and affordable low-cost alternative to PCI. However the SPI can only be used in low-bandwidth applications.

Currently in this version of the software development kit, we are not providing any drivers for the SPI. The official release will contain several generic SPI drivers.

LCD Interface

The dimmPCITM backplane has an LCD connector that is fully supported by the dimmPCITM module. The LCD connector is designed for a 4-bit LCD panel. The LCD’s contrast can be adjusted by sending a PWM signal over the LCONTRAST line. The device driver, in the future, will allocate a block of memory for the LCD.

Information about how to hook up a LCD to the backplane can be found in Appendix D1.

Figure 9. LCD Schematic

28 www.amctechcorp.com