ucb1500 NXP Semiconductors, ucb1500 Datasheet - Page 7

• Manufacturer Part Number: ucb1500
• Description: Pci To Ac97 Bridge/host Controller
• Manufacturer: NXP Semiconductors

Table 4:
Philips Semiconductors
9397 750 07443
Product specification
31-24
Reserved
PMC =
4801 (V
C801 (V
Modified by BIOS via writing to 6Ah, or EEPROM
autoloading to PCI-PM1.1
Reserved
AUX_AV
AUX_AV
Function 0 configuration registers
= 0, no autoload)
= 1, no autoload)
23-16
[01-00]: Vendor ID (read only):
register 40h. Default value = 1131h
[03-02]: Device ID (read only):
register 42h. Default value = 3400h
[05-04]: Command Register
Table 5:
Bit
15-10
9(r)
8
7(r)
6
5(r)
4(r)
3(r)
2
1(r)
0
Command Register bit description
Description
Reserved.
Fast Back-to-back Transactions
Always 0, fast back-to-back transactions is not supported.
SERR enable
If set, SERR driver is enabled; if 0, SERR is disabled.
Address/Data Stepping
Always 0, address/data stepping is not implemented.
Parity Error Response
When set, the device must take its normal action when a parity error is detected. If
this bit is 0, the device must ignore any parity errors that it detects and continue
normal operation.
VGA Snooping
Always 0, not implemented.
Memory Write and Invalidate Command
Always 0, UCB1500 does not generate memory write and invalidate command.
Special Cycle Response
Always 0, UCB1500 ignores all special cycles.
Bus Master Control
PCI Master access enable; this bit must be enabled to activate UCB1500 DMA
register.
1 = enable.
Memory Space Response
Always 0, UCB1500 does not respond to memory space accesses.
I/O Space Control
UCB1500 control register I/O space access enable.
1 = enable.
…continued
Rev. 03 — 7 July 2000
15-8
Next Item Per = 00
PMCSR = 0000 (S)
Programmable through EEPROM interface, or
Programmable through EEPROM interface, or
7-0
Capability ID = 01
PCI to AC97 bridge/host controller
© Philips Electronics N.V. 2000. All rights reserved.
UCB1500
Address
70-7Fh
80h
84h
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