POSMicro B16 Manual de instrucciones descargar pdf (Pagina 37)

3.3.2.5. Data Transfer of p3i_CL

Since the p3i_CL is a busmaster card, the video data for a single frame or a whole sequence is moved

into memory per DMA-transfer. There is no need for the CPU to support this process. The maximum

transfer rate in a system is 105 Mbytes/s typically. In a real application the transfer rate depends on the

chipset, graphic card and other active busmaster cards.

3.3.2.6. SODIMM for p3i_CL

The SODIMM on the p3i_CL is used as a large FIFO to buffer data especially in cases the PCI bus is

busy or data rate exceeds PCI bus bandwidth.

The SODIMM consists of SDRAM modules and is clocked with 66 MHz. "Non Mixed-Mode" module

configurations are used and each SDRAM module has 4 banks.

The used SODIMM capacity is dependent on the selected data mode:

Table 3.6. Used SODIMM Capacity Dependent on Selected Data Mode

MODE Used SODIMM Capacity [%]

Mode0 (1x8bit) 50

Mode1 (2x8bit) 100

Mode2 (3x8bit) 75

Mode3 (3x8bit (RGB)) 75

Mode4 (1x10bit) 62.5

Mode5 (2x10bit) 62.5

Mode6 (1x12bit) 93.75

Mode7 (2x12bit) 75

Mode8 (1x14bit) 87.5

Mode9 (1x16bit) 100

Chapter 3. Hardware Reference

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POSMicro B16 Manual de instrucciones Pagina 37