DP83816-MAAP National Semiconductor, DP83816-MAAP Datasheet - Page 33

• Manufacturer Part Number: DP83816-MAAP
• Description: BOARD EVALUATION DP83816
• Manufacturer: National Semiconductor

Specifications of DP83816-MAAP

• Main Purpose: Interface, Ethernet
• Utilized Ic / Part: DP83816
• Lead Free Status / RoHS Status: Not applicable / Not applicable
• Secondary Attributes: -
• Embedded: -
• Primary Attributes: -

4.0 Register Set
4.1.4 Configuration Latency Timer Register
This register gives status and controls such miscellaneous functions as BIST, Latency timer and Cache line size.
DP83816 Bus Master Operations:
Independent of cache line size, the DP83816 will use the following PCI commands for bus mastered transfers:
4.1.5 Configuration I/O Base Address Register
This register specifies the Base I/O address which is required to build an address map during configuration. It also
specifies the number of bytes required as well as an indication that it can be mapped into I/O space.
29-16
15-8
31-8
Bit
Bit
7-0
7-2
31
30
1
0
Bit Name
Bit Name
BISTCAP
IOBASE
BISTEN
IOSIZE
IOIND
CLS
LAT
Offset: 0Ch
Offset: 10h
0110 - Mem Read
0111 - Mem Write
(Continued)
Tag: CFGLAT
Tag: CFGIOA
BIST Capable
Reads will always return 0.
BIST Enable
Reads will return a 0, writes are ignored.
Reserved
Reads will return a 0, writes are ignored.
Latency Timer
Set by software to the number of PCI clocks that DP83816 may hold the PCI bus.
Cache Line Size
Ignored by DP83816.
Base I/O Address
This is set by software to the base I/O address for the Operational Register Map.
Size indication
Read back as 0. This allows the PCI bridge to determine that the DP83816 requires 256 bytes of I/O
space.
Unused
(reads return 0).
I/O Space Indicator
Set to 1 by DP83816 to indicate that DP83816 is capable of being mapped into I/O space. Read Only.
Access: Read Write
Access: Read Write
for all read cycles,
for all write cycles.
Size: 32 bits
Size: 32 bits
33
Description
Description
Hard Reset: 00000000h
Hard Reset: 00000001h
Soft Reset: Unchanged
Soft Reset: Unchanged
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