JAJSQ97J may 2009 – january 2021 XIO2001
PRODUCTION DATA
The Texas Instruments XIO2001 is a PCI Express to PCI local bus translation bridge that provides full PCI Express and PCI local bus functionality and performance.
Power management (PM) features include active state link PM, PME mechanisms, the beacon and wake protocols, and all conventional PCI D-states. If the active state link PM is enabled, then the link automatically saves power when idle using the L0s and L1 states. PM active state NAK, PM PME, and PME-to-ACK messages are supported. Standard PCI bus power management features provide several low power modes, which enable the host system to further reduce power consumption.
The bridge has additional capabilities including, but not limited to, serial IRQ with MSI messages, serial EEPROM, power override, clock run, PCI Express clock request and PCI bus LOCK. Also, five general-purpose inputs and outputs (GPIOs) are provided for further system control and customization.
Robust pipeline architecture is implemented to minimize system latency across the bridge. If parity errors are detected, then packet poisoning is supported for both upstream and downstream operations.
The PCI local bus is fully compliant with the PCI Local Bus Specification (Revision 2.3) and associated programming model. Also, the bridge supports the standard PCI-to-PCI bridge programming model. The PCI bus interface is 32-bit and can operate at either 25 MHz, 33 MHz, 50 MHz, or 66 MHz. Also, the PCI interface provides fair arbitration and buffered clock outputs for up to 6 subordinate devices.