Rainbow Electronics DS3134 - Manual (Page 160)

DS3134
160 of 203
Register Name: PRCC1
Register Description: PCI Revision ID / Class Code Register 1
Register Address:
0x108h
lsb
Revision ID (Read Only / set to 00h)
Class Code (Read Only / set to 00h)
Class Code (Read Only / set to 80h)
msb
Class Code (Read Only / set to 06h)
Bits 0 to 7 / Revision ID. These read only bits identify the specific device revision and are selected by
Dallas Semiconductor.
Bits 8 to 15 / Class Code Interface. These read only bits identify the sub-class interface value for the
device and are fixed at 00h. See Appendix D of PCI Local Bus Specification Revision 2.1 for details.
Bits 16 to 23 / Class Code Sub-Class. These read only bits identify the sub-class value for the device
and are fixed at 80h, which indicate "Other Bridge Device". See Appendix D of PCI Local Bus
Specification Revision 2.1 for details.
Bits 24 to 31 / Class Code Base Class. These read only bits identify the base class value for the device
and are fixed at 06h, which indicate "Bridge Devices". See Appendix D of PCI Local Bus Specification
Revision 2.1 for details.
Register Name: PLTH1
Register Description: PCI Latency Timer / Header Type Register 1
Register Address:
0x10Ch
lsb
Cache Line Size (Read Only / set to 00h)
Latency Timer (Read Only / set to 00h)
Header Type (Read Only / set to 80h)
msb
BIST (Read Only / set to 00h)
Bits 0 to 7 / Cache Line Size. These read only bits are forced to zero.
Bits 8 to 15 / Latency Timer. These read only bits are forced to a zero by the device since the device
cannot act as a bus master.
Bits 16 to 23 / Header Type. These read only bits are forced to 80h, which indicate a multifunction
device.
Bits 24 to 31 / Built-In Self Test (BIST). These read only bits are forced to zero.