Application Information

The TPCE261 is a standard height, half-length PCI

Express Revision 2.0 compatible module that provides

one slot for a single-width PMC module used to build

modular, flexible and cost effective I/O solutions for all

kinds of applications like process control, medical

systems, telecommunication and traffic control. The

TPCE261 is a versatile solution to upgrade well known

PMC I/O solutions to the PCI Express signalling standard.

On the PCI Express side, an x1 link with 2.5GT/s speed to

the host board is provided.

The bridging between the system host board and the PMC

slot is handled by the PCIe-to-PCI Bridge XIO2001 from

Texas Instruments.

On the PMC side, PCI signalling voltages of 3.3V

(TPCE261-x1R) and 5V (TPCE261-x0R) are supported.

32-bit PCI accesses are possible with 33MHz or 66MHz.

The TPCE261 supports PMC front-panel I/O and also

PMC P14 Rear-I/O through a 68-pin ERNI SMC 1.27mm

flat cable connector.

The PCIe edge card connector provides +12V and +3.3V.

All TPCE261-xx variants do not use the +3.3V at all. The

TPCE261-1xR uses the +12V of the PCIe edge card

connector to generate all four power supply voltages for

the PMC slot (+3.3V, +5V, +12V and -12V).

According to the PCIe specification, a PCIe x1 card is

limited to 6W on the +12V which allows to operate most of

the available 32-bit 33/66 MHz PMC modules on the

TPCE261-1xR.

For PMC modules with increased power requirements, the

TPCE261-2xR offer an additional PCIe Graphics Power

Connector to supply the +12V for generating all the power

supply voltages for the PMC slot providing a power of up

to 25W.