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IP100
10.6.17 MemBaseAddress
Class............................. LAN PCI Configuration Registers, Configuration
Base Address ............... PCI device configuration header start
Address Offset .............. 0x14
Default .......................... 0x00000000
Width ............................ 32 bits
MemBaseAddress can be disabled via loading of the ConfigParm field from an EEPROM during
auto-ini-tialization of the IP100.
BIT
BIT NAME
R/W
0
MemBaseAddrInd
R
Memory Base Address Indicator. When MemBaseAddrInd is a logic
1, MemBaseAddrInd contains the valid memory base address.
2..1
MemMapType
R
Memory Map Type. MemMapType defines how the host system
maps the IP100’s registers within the host system memory space.
Bit 2 of MemMapType is always a logic 0, while bit 1 is loaded from
the Lower1Meg bit of the ConfigParm field within an EEPROM
during auto initialization of the IP100.
BIT 2
BIT 1
0
0
0
1
1
x
6..3
Reserved
N/A
Reserved for future use.
31..7
MemBaseAddress
R/W
Memory Base Address. MemBaseAddress contains the 25 bit
memory base address value. The IP100 uses 128 bytes of I/O space.
10.6.18 MinGnt
Class............................. LAN PCI Configuration Registers, Configuration
Base Address ............... PCI device configuration header start
Address Offset .............. 0x3e
Default .......................... 0x00
Width ............................ 8 bits
BIT
BIT NAME
R/W
7..0
MinGnt
R
Minimum Grant Time. MinGnt specifies, in 250 ns increments, how
long a burst period the IP100 requires when operating as a bus master.
Bits 7 through 4 of the MinGnt value are loaded from the ConfigParm
field within an EEPROM during auto initialization of the IP100.
10.6.19 NextItemPtr
Class............................. LAN PCI Configuration Registers, Power Management
Base Address ............... PCI device configuration header start
Address Offset .............. 0x51
Default .......................... 0x00
Width ............................ 8 bits
BIT
BIT NAME
R/W
7..0
NextItemPtr
R
Next Item Pointer. NextItemPtr indicates the next capability data
structure in the capabilities list. When NextItemPtr is set to the value
0x00, there are no further data structures.
Copyright
2003, IC Plus Corp.
All rights reserved.
Preliminary, Specification subject to change without notice.
78/92
IP100-DS-R03
May 27, 2003
BIT DESCRIPTION
REGISTER MAPPING
Anywhere within a 32 bit address space
Lower 1 megabyte of 32 bit address space
Undefined
BIT DESCRIPTION
BIT DESCRIPTION