ibm3206k0424 ETC-unknow, ibm3206k0424 Datasheet - Page 97

• Manufacturer Part Number: ibm3206k0424
• Description: Ibm Processor For Network Resources
• Manufacturer: ETC-unknow

Preliminary
1.3: PCINT Config Word 2
The Class Code is used to identify the generic function for this device. The Revision ID is used to identify the
level of function for this device. See bit definitions.
Length
Type
Address
Restrictions
Power on Reset value
(Big Endian)
Power on Reset value
(Little Endian)
pnr25.chapt04.01
August 14, 2000
31 30 29 28 27 26 25 24 23 22 21 20 19 18 17 16 15 14 13 12 11 10
31-24
23-16
Bit(s)
15-8
7-0
Upper Byte
PCI Spec
23-16
15-8
7-0
7-0
Upper Byte
Middle Byte
Lower Byte
Revision ID
32 bits
Read Only
XXXX 0008
Can be written or read during configuration cycle, memory cycle when enabled (see
PCINT Base Address Control Register on page 111), or an I/O cycle. This register
is documented as big endian, but how data is presented on the PCI bus depends
on how the controls are set in the PCINT Endian Control Register.
X’02030025’
X’25000302’
Name
Middle Byte
The upper byte of the Class Code is a base code that broadly classifies
the type of function this device performs. Code chosen is: X’02’ - Network
controller
The middle byte of the Class Code is a sub-class code that identifies more
specifically the function of this device. Code chosen is: X’03’ - ATM con-
troller
The lower byte of the Class Code identifies a specific register-level pro-
gramming interface so that device independent software can interact with
this device. There are two secret functions here. By writing bit 15 to ’1’, the
class code of ‘03’ (ATM) changes to ‘00 (Ethernet). The read value of bit
15 remains ’0’. By writing bit 14 to ’1’, bit 23 of Config Word 3 (also known
as bit 7 of the Header Type byte) will reflect a value of ’1’, indicating that it
is a multi-function device. The read value of bit 14 remains ’0’. Bits 13
down to eight are still available to be set to indicate a register-level pro-
gramming interface.
This is the revision level of this chip.
Lower Byte
The IOP Bus Specific Interface Controller (PCINT)
IBM Processor for Network Resources
Description
9
8
7
6
5
Revision ID
4
IBM3206K0424
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