131

	Contents
7	Primary PCI Bus Interface 64-Bit Extension Signals	26
8	Secondary PCI Bus Interface Signals	28
9	Secondary PCI Bus Interface 64-Bit Extension Signals	30
10	Miscellaneous Signals	31
11	Upstream Memory 2 Window Size	38
12	Bar Summary	47
13	Delayed Write Transaction Target Termination Returns	55
14	Delayed Read Transaction Target Termination Returns	56
15	Prefetch Boundaries	58
16	21555 Transaction Ordering Rules	62
17	Power Management, Hot-Swap, and Reset Signals	65
18	Reset Mechanisms	67
19	Power Management Actions	71
20	Primary and Secondary PCI Bus Clock Signals	77
21	PROM Interface Signals	82
22	SROM Interface Signals	91
23	Primary PCI Bus Arbitration Signals	97
24	Secondary PCI Bus Arbitration Signals	97
25	Arbiter Control Register	100
26	Primary and Secondary PCI Bus Interrupt Signals	101
27	Primary PCI Bus Error Signals	105
28	Secondary PCI Bus Arbitration Signals	106
29	Parity Error Responses	107
30	JTAG Signals	111
31	Register Cross Reference Table	121
32	Configuration Space Address Register	122
33	CSR Address Map	126
34	Primary CSR and Downstream Memory 0 Bar	130
35	Secondary CSR Memory BARs	131
36	Primary and Secondary CSR I/O Bars	132
37	Downstream I/O or Memory 1 and Upstream I/O or Memory 0 BAR	133
38	Downstream Memory 2 and 3 BAR, and Upstream Memory 1 BAR	134
39	Upper 32 Bits Downstream Memory 3 Bar	135
40	Upstream Memory 2 Bar	135
41	Downstream I/O or Memory 1 and Upstream I/O or Memory 0 Translated Base Register	136
42	Downstream Memory 0, 2, 3, and Upstream Memory 1 Translated Base Register	137
43	Downstream I/O or Memory 1 and Upstream I/O or Memory 0 Setup Registers	138
44	Downstream Memory 0, 2, 3, and Upstream Memory 1 Setup Registers	139
45	Upper 32 Bits Downstream Memory 3 Setup Register	140
46	Downstream and Upstream Configuration Address Registers	141
47	Downstream Configuration Data and Upstream Configuration Data Registers	142
48	Configuration Own Bits Register	142
49	Configuration CSR	143
50	Downstream I/O Address and Upstream I/O Address Registers	144
51	Downstream I/O Data and Upstream I/O Data Registers	145
52	I/O Own Bits Registers	145
53	I/O CSR	146
54	Lookup Table Offset Register	146
55	Lookup Table Data Register	147
56	Upstream Memory 2 Lookup Table	147

21555 Non-Transparent PCI-to-PCI Bridge User Manual

21555 specifications

The Intel 21555 is a prominent microprocessor developed by Intel, designed to cater to a variety of computing needs. This processor marks a significant step forward in Intel's lineup and underscores the company's commitment to advancing technology in personal computing, enterprise solutions, and beyond.

One of the standout features of the Intel 21555 is its advanced architecture. It utilizes a multi-core design, enabling improved performance through parallel processing. This architecture allows multiple applications to run seamlessly without a decline in speed. The cores are built on a cutting-edge manufacturing process that enhances energy efficiency while maintaining high clock speeds.

The Intel 21555 supports a wide range of technologies, including Intel Turbo Boost, which enables dynamic adjustments to the processor’s performance based on workload demands. This feature allows the processor to accelerate its speed during intensive tasks, providing users with a responsive experience when it matters the most.

Another key characteristic of the Intel 21555 is its support for integrated graphics. With Intel UHD Graphics technology, users can enjoy enhanced visuals for everyday tasks such as video playback, web browsing, and light gaming. This eliminates the need for a separate graphics card for many users, particularly in home office or light gaming scenarios.

Security is a significant focus in the design of the Intel 21555. It includes built-in hardware-based security features like Intel Trusted Execution Technology and Secure Boot. These features help protect against various types of threats, ensuring that user data remains secure from malicious attacks.

The Intel 21555 is also optimized for use with Intel's platform technologies, including Intel Optane memory and Intel Rapid Storage Technology. These technologies work together to deliver faster boot times and improved system responsiveness, making computing more efficient for users.

Furthermore, the Intel 21555 is designed to support virtualization technologies, allowing multiple operating systems to run concurrently without compromising performance. This is particularly useful for developers and businesses that rely on virtualization for testing and development environments.

In summary, the Intel 21555 is a powerful and versatile processor that reflects Intel's ongoing innovation in the computing space. With its multi-core architecture, enhanced graphics capabilities, strong security features, and advanced technologies, it stands out as an excellent choice for a wide range of applications, serving both casual users and professionals alike.

Intel 21555 user manual 131

Models: 21555

21555 specifications