gwixp425bdt Intel Corporation, gwixp425bdt Datasheet - Page 25
gwixp425bdt
Manufacturer Part Number
gwixp425bdt
Description
Intel Xp42x Product Line Of Network Processors And Ixc1100 Control Plane Processor
Manufacturer
Intel Corporation
Datasheet
1.GWIXP425BDT.pdf
(134 pages)
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Datasheet
High-Speed and Console UARTs
The UART interfaces are 16550-compliant UARTs with the exception of transmit and receive
buffers. Transmit and receive buffers are 64 bytes-deep versus the 16 bytes required by the
16550 UART specification.
The interface can be configured to support speeds from 1,200 baud to 921 Kbaud. The interface
support configurations of:
The request-to-send (RTS_N) and clear-to-send (CTS_N) modem control signals also are available
with the interface for hardware flow control.
GPIO
There are 16 GPIO pins supported by the IXP42X product line and IXC1100 control plane
processors. GPIO pins 0 through 13 can be configured to be general-purpose input or general-
purpose output. Additionally, GPIO pins 0 through 12 can be configured to be an interrupt input.
GPIO Pin 14 can be configured similar to GPIO pin 13 or as a clock output. The output-clock
configuration can be set at various speeds, up to 33.33 MHz, with various duty cycles. GPIO Pin 14
is configured as an input, upon reset.
GPIO Pin 15 can be configured similar to GPIO pin 13 or as a clock output. The output-clock
configuration can be set at various speeds, up to 33.33 MHz, with various duty cycles. GPIO Pin 15
is configured as a clock output, upon reset. GPIO Pin 15 can be used to clock the expansion
interface, after reset.
Internal Bus Performance Monitoring Unit (IBPMU)
The IXP42X product line and IXC1100 control plane processors consists of seven 27-bit counters
that may be used to capture predefined durations or occurrence events on the North AHB, South
AHB, or SDRAM controller page hits/misses.
Interrupt Controller
The IXP42X product line and IXC1100 control plane processors consists of 32 interrupt sources to
allow an extension of the Intel XScale
originate from some external GPIO pins or internal peripheral interfaces.
The interrupt controller can configure each interrupt source as an FIQ, IRQ, or disabled. The
interrupt sources tied to Interrupt 0 to 7 can be prioritized. The remaining interrupts are prioritized
in ascending order. For example, Interrupt 8 has a higher priority than 9, 9 has a higher priority than
10, and 30 has a higher priority that 31.
•
•
•
Intel
Five, six, seven, or eight data-bit transfers
One or two stop bits
Even, odd, or no parity
®
IXP42X Product Line of Network Processors and IXC1100 Control Plane Processor
Document Number: 252479, Revision: 005
®
Core FIQ and IRQ interrupt sources. These sources can
March 2005
25
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