TPCE260 User Manual Issue 1.0.3
Page 10 of 17
PCI Bus Device Number Mapping
The PCI bus device number of the PMC slot is defined by configuration type translation of the PCI-Express to
PCI Bridge.
By default, the PMC slot is mapped to the bus device number 0x0.
PCI Bus Device
Number (HEX)
PCI AD Line
used as PMC
IDSEL
Purpose
0x0
16
Default IDSEL for PMC Slot
0x1
0x2
0x3
17
18
19
Not used on TPCE260
0x4
20
Optional IDSEL for PMC Slot
0x5
-
0xF
21
-
31
Not used on TPCE260
Table 4-2 : PCI Bus Device Number Mapping
PCI Clock Frequency
The TPCE260 supports 66 MHz PCI clock frequency. The actual PCI clock frequency on the TPCE260 is
configured by the plugged PMC module. If the plugged PMC module supports 66 MHz operation, the PCI bus
will operate with 66 MHz; otherwise it will operate with 33 MHz.
Configuration EEPROM
After PCIe reset, the PI7C9X111SL loads initial configuration register data from an on board configuration I2C
EEPROM. The content is a complete set of configuration parameters based on the default settings with the
subsequent modifications.
For detailed information please refer to the PI7C9X111SL manual and Errata information.
Modifications are:
Enable Lane Polarity Inversion (disabled by default)
