Re: pci9080 chip

["Masaru Naganuma" <naganuma@edec.co.jp>]

Harkema,
You should tie NB# to GND if there is no EEPROM.
If not, 9080 expect to configure from local processor.
------------------------------------------------------------
Masaru Naganuma for edec co.,ltd. <naganuma@edec.co.jp>

----- Original Message ----- 
From: "Harkema, G.A." <G.A.Harkema@tue.nl>
To: <pci-sig@znyx.com>
Sent: Thursday, July 27, 2000 2:44 PM
Subject: pci9080 chip


> Hello,
> we are developing a PCI board to controll a data aquasition system. On
> the PCI board is the PCI9080 chip. On the local bus of the PCI9080 is
> only a I/O controller whitch is implemented in a FLEX7000 EPLD from
> Altera. There is no EEPROM placed on the board. We are using the PCI
> chip in "C mode". Local bus input signal lines have the following signal
> levels:
> ADMODE             = VCC
> BIGEND#               = VCC
> BREQ                    = GND
> DREQ[1:0]#          = VCC
> LRESETI#             = VCC
> NB#                     = VCC
> S[2:0]                  = GND
> WAITI#                = VCC
> BTERM#              = VCC
> LLOCK#                = VCC
> LHOLDA              = GND
> EOT0#                   = VCC
> EOT1#                   = VCC
> READYI#                = VCC
> LINTI#                  = VCC
> 
> All tri-state I/O pins except LD[31:0], LA[31:2] and LBE[3:0]# have a
> pull-up resistor to VCC (10k), all tri-state I/O from the EPLD is
> permently disabled.
> 
> All PCI bus signals are connected to the PCI bus (PCI bus = 32 bit, 33
> MHz, 5 V).
> 
> The local bus clock frequency is 20 MHz.
> 
> When booting the computer system we see the following:
> LRESET0# goes low for about 160 ms.
> After this the EESK clock starts and the EECS goes high.
> After 11 EESK clocks EECS goes low and after 13 EESK clocks EESK stops
> clocking.
> ??? what is happening according the datasheet of the PCI9080, page 117,
> EESK is a continous clock ???
> 
> During EEPROM initialization the PCI9080 respons on the PCI bus as a
> disconnect.
> ??? according the datasheet page 14 is should respons as a retry ???
> 
> After a while (we dont now how long) the respons to the PCI bus is a
> retry, and the computer system hangs (in the boot sequence).
> ??? why is respons of the PCI9080 chip to the PCI bus a retry, the
> EEPROM is not loaded and the NB# pin is connected to ground ???
> 
> Please help us.
> 
> Kindest regards
> 
> Gerard A Harkema
> 
>