One Stop Systems, Inc. OSS-adaptPCI-PMC User Manual
Rev. A
6
M66EN
The M66EN signal is used to determine the bus transfer speed (33 or 66 Mhz). The M66EN signal is connected directly to the PMC
module. The PMC module controls the M66EN level, and thus controls the bus transfer speed.
PCI JTAG Interface
The TDI and TDO JTAG signals at P1- A4 and P1-B4 are connected to a zero ohm jumper R19. This jumper is installed to continue
the JTAG chain when the card is installed in a PCI slot. This jumper must be removed if the user’s testing requires the need to
break the JTAG chain. All other JTAG signals are no connects
PMC Interface
The adaptPMC supports 32 and 64 bit data transfers up to 66MHz. The PMC site has mounting locations for keying post (both 3.3V
and 5V, not installed). Pin assignments for the PMC connectors Jn1 – Jn3 can be found in the IEEE Specification 1386.1-2001,
Table 1.
PMC JTAG Interface
There is a JTAG TAP connector (J1) as well as an Altera Byte Blaster connector (J2) to provide an interface to the JTAG chain and
device programming on a PMC module. Latest JTAG practice requires that the /TRST signal be pulled low for normal device
operation. The /TRST signal is connected to pin 8 of the Byte Blaster connector through a zero ohm jumper. Install this jumper R8 to
pull up /TRST when programming devices that pull /TRST low. Headers for J1 and J2 are not installed on the standard product.
A modified Byte Blaster cable is required to pull up / TRST.
BUSMODE Signals
The adaptPMC supplies BUSMODE[4:2]# signals to the PMC card. Zero ohm resistor stuffing options for BUSMODE[4:2]# allow for
alternate mode selection. The standard stuffing for BUSMODE# is BUMSMODE4# = 0 , BUSMODE3# = 0 and BUSMODE2# = 1.
BUSMODE1# from the PMC module is observable by an LED. Zero ohm jumpers R9 –R14 configure the mode.
BUSMODE4# BUSMODE3# BUSMODE2# MODE
/BUSMODE1
R14 Installed
0
R12 Installed
0
R9 Installed
0
Card Present Test
0
R14 Installed
0
R12 Installed
0
R10 Installed
1
PCI Protocol
Default Configuration
0
Any Other State
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1
Jn1 through Jn3 connectors
The Jn1 through Jn3 connectors map directly to the PCI edge card connector. See the IEEE P1386.1-2001 specification, Table 1,
for the mapping by signal name.
