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4.9 USB Ports
The C2K includes an ISP1563 Hi-Speed USB PCI Host Controller, attached to PCI Bus 1 through
the PCI2050B PCI/PCI Bridge, that provides three USB 2.0 ports—USB1, USB2, and USB3—to
the backplane through the cPCI_J4 connector. A fourth USB port—USB4— is routed to a
standard front-panel Type A USB connector (P8) on C-style versions only.
The USB 2.0 Controller supports three data transfer speeds—USB 1.0 (1.5MHz), USB 1.1
(12MHz), and USB 2.0 (480MHz).
The PCI2050B PCI/PCI Bridge provides a 32-bit 33MHz PCI bus to the USB 2.0 Controller to
prevent the USB 2.0 Controller from limiting PCI Bus 1 to 33MHz.
The PCI2050B arbitrates the secondary PCI bus with its internal arbiter. The USB 2.0 Controller
on the secondary bus uses the arbiters request/grant pair 0# and AD bit 16 for IDSEL. The
PCI2050B secondary clock outputs are not used and should be disabled by application software.
The C2K provides four on-board green LEDs to diagnose USB port activity as listed in Table 4-2.
USB on-board indicator LEDs
Table 4-2
LED
D12
USB1
D13
USB2
D14
USB3
D15
USB4 (C-style versions only)
4.10 General-Purpose I/O
The C2K provides 16 General-Purpose I/O (GPIO) lines to the cPCI backplane: GPIO_0–3 to
cPCI_J4 and GPIO_4–15 through cPCI_J5. The FPGA provides internal registers for status,
control and interrupt masking (see "GPIO Registers" on page 5-16). Each GPIO line can be
configured as a input or output. The inputs can be configured as inverted or non-inverted and the
outputs can be configured as TTL or open-drain. Each line can generate an interrupt that can be
masked through the FPGA Interrupt Mask Register. Each interrupt can be configured as
edge-triggered or level-triggered. The GPIO lines are +5V tolerant.
4.11 Serial ATA I/O
The C2K provides two 1.5Gb/s Serial ATA 1.0 interfaces to the backplane through cPCI_J5. A
GD31244 Quad Serial ATA Host Controller located on PCI Bus 1 provides termination for the
SATA ports. The SATA controller's default configuration is set for Master/Slave operation.
NOTE: Each SATA interface is capable of data transfer rates of 150MB/s, however, the PCI inter-
face must be operating at 66MHz to sustain the combined transfer rate of 300MB/s for both inter-
faces. If a 33MHz PMC module is installed on PMC1, the SATA transfer rate will be degraded.
The C2K provides two on-board LEDs to monitor SATA interface activity. The LED output is as
shown in Table 4-3.
C2K User's Guide
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USB Port
LED Indication
LED Off:
Port not operational
LED On:
Port fully operational
LED Blinking:
Software attention
Functional Blocks
4-6
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