Altera PCI Compiler Manuale Utente Pagina 106

  • Scaricare
  • Aggiungi ai miei manuali
  • Stampa
  • Pagina
    / 360
  • Indice
  • SEGNALIBRI
  • Valutato. / 5. Basato su recensioni clienti
Vedere la pagina 105
3–32 User Guide Version 11.1 Altera Corporation
PCI Compiler October 2011
Configuration Registers
Command Register
Command is a 16-bit read/write register that provides basic control over
the ability of the PCI function to respond to the PCI bus and/or access it.
Refer to Table 3–16.
Table 3–16. Command Register Format
Data
Bit
Mnemonic Read/Write Definition
0
io_ena
Read/write
I/O access enable. When high,
io_ena lets the function respond to
the PCI bus I/O accesses as a target.
1
mem_ena
Read/write
Memory access enable. When high,
mem_ena lets the function
respond to the PCI bus memory accesses as a target.
2
mstr_ena
Read/write
Master enable. When high,
mstr_ena allows the function to request
mastership of the PCI bus. Bit 2 is hardwired to
1 when PCI master
host bridge options are enabled through the wizard.
3Unused
4
mwi_ena
Read/write Memory write and invalidate enable. This bit controls whether the
master may generate a MWI command. Although the function
implements this bit, it is ignored. The local side must ensure that the
mwi_ena output is high before it requests a master transaction using
the MWI command.
5Unused
6
perr_ena
Read/write
Parity error enable. When high,
perr_ena enables the function to
report parity errors via the
perrn output.
7Unused
8
serr_ena
Read/write
System error enable. When high,
serr_ena allows the function to
report address parity errors via the
serrn output. However, to signal
a system error, the
perr_ena bit must also be high.
9Unused
10 int_dis Read/write Interrupt disable. A value of 1 disables the PCI MegaCore function
from asserting
intan on the PCI bus. However, the interrupt is only
disabled after the preexisting interrupt has been serviced.
15..11 Unused
Vedere la pagina 105
1 2 ... 101 102 103 104 105 106 107 108 109 110 111 ... 359 360

Commenti su questo manuale

Nessun commento

Dell Interface cards/adapters user manuals

Starting on L

Click on an alphabet below to scroll to the full list of models starting with that letter

Models Document Type
Laptop dell
User Manual       Dell Laptop dell User's Manual, 2 pages
Latitude Cpi
User's Guide      Dell Latitude Cpi Deployment Guide, 18 pages
LPe12002
Datasheet   DELL Emulex LPe12000, 2 pages