Altera Nios Development Board Manual de usuario descargar pdf (Pagina 14)

1–6 Altera Corporation

Nios Development Board Reference Manual, Cyclone Edition December 2004

CompactFlash Connector

CompactFlash

Connector

The CompactFlash connector (CON3) enables hardware designs to access

a CompactFlash card (see Figure 1–3). The following two access modes

are supported:

■ ATA (hot swappable mode)

■ IDE (IDE hard disk mode)

Figure 1–3. CompactFlash Connector

Most pins of CON3 connect to I/O pins on the FPGA. The following pins

have special connections:

■ Pin 13 of CON3 (VCC) is driven by a power MOSFET that is

controlled by an FPGA I/O pin. This allows the FPGA to control

power to the CompactFlash card for the IDE connection mode.

■ Pin 26 of CON3 (-CD1) is pulled up to 5V through a 10 Kohm resistor.

This signal is used to detect the presence of a CompactFlash card;

when the card is not present, the signal is pulled high through the

pull-up resistor.

■ Pin 41 of CON3 (RESET) is pulled up to 5V through a 10 Kohm

resistor, and is controlled by the EPM7128AE configuration

controller. The FPGA can cause the configuration controller to assert

RESET, but the FPGA does not drive this signal directly.

1 The CompactFlash connector shares several Cyclone I/O pins

with expansion prototype connector PROTO1. See “Expansion

Prototype Connector (PROTO1)” on page 1–11 for details on

PROTO1.

Table 1–2 on page 1–7 provides CompactFlash pin out details.

1 2 ... 9 10 11 12 13 14 15 16 17 18 19 ... 53 54

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Altera Nios Development Board Manual de usuario Pagina 14