Variable I/O Decode Ranges

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Introduction
PCH Controller Device IDs
- Revision IDs
- Device IDs
Memory Mapping
- Functional Description
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Audio Voice and Speech
Ballout Definition
Connectivity Integrated (CNVi)
Controller Link
Direct Enhanced Serial Peripheral Interface (Direct eSPI)
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Host System Management Bus (SMBus) Controller
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Intel® Serial I/O Improved Inter-Integrated Circuit (I3C) Controllers
Intel® Serial I/O Inter-Integrated Circuit (I2C) Controllers
Intel® Serial I/O Universal Asynchronous Receiver/Transmitter (UART) Controllers
Intel® Serial IO Generic SPI (GSPI) Controllers
PCI Express* (PCIe*)
Real Time Clock (RTC)
- Signal Description
- I/O Signal Planes and States
Serial ATA (SATA)
Serial Peripheral Interface (SPI)
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- Integrated Clock Controller (ICC)
  - Signal Descriptions
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System Management Interface and SMLink
Touch Host Controller (THC)
Universal Serial Bus (USB)
General Purpose Input and Output
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GPIO Serial Expander
Private Configuration Space Port ID
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  - TCO Modes
Testability and Monitoring
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- I/O Signal Planes and States
Miscellaneous Signals
Processor Sideband Signals
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Power Delivery
- Power and Ground Signals
Power Management
Thermal Sensor
Electrical Characteristics

The following Table shows the Variable I/O Decode Ranges. They are set using Base Address Registers (BARs) or other configuration bits in the various configuration spaces. The PnP software (PCI or ACPI) can use their configuration mechanisms to set and adjust these values.

Warning:The Variable I/O Ranges should not be set to conflict with the Fixed I/O Ranges. There may some unpredictable results if the configuration software allows conflicts to occur. The PCH does not perform any checks for conflicts.

Variable I/O Decode Ranges

Range Name¹	Mappable	Size (Bytes)	Target
IDE Bus Host	Anywhere in 64K I/O Space	16 or 32 Bytes	Intel^® AMT IDE-R
SMBus	Anywhere in 64K I/O Space	32	SMB Unit
TCO	Anywhere in 64K I/O Space	32	SMB Unit
Parallel Port	3 ranges in 64K I/O Space	8	eSPI
Serial Port 1	8 Ranges in 64K I/O Space	8	eSPI
Serial Port 2	8 Ranges in 64K I/O Space	8	eSPI
eSPI Generic 1	Anywhere in 64K I/O Space	4 to 256 Bytes	eSPI
eSPI Generic 2	Anywhere in 64K I/O Space	4 to 256 Bytes	eSPI
eSPI Generic 3	Anywhere in 64K I/O Space	4 to 256 Bytes	eSPI
eSPI Generic 4	Anywhere in 64K I/O Space	4 to 256 Bytes	eSPI
Serial ATA Index/Data Pair	Anywhere in 64K I/O Space	16	SATA Host Controller
PCI Express* Root Ports	Anywhere in 64K I/O Space	I/O Base/Limit	PCI Express* Root Ports 1-24
Keyboard and Text (KT)	Anywhere in 64K I/O Space	8	Intel^®AMT Keyboard and Text
DMI General Purpose I/O Ranges (1 to 3)	Anywhere in 64K I/O Space	4 to 256 Bytes	General purpose
Notes: All ranges are decoded directly from IOC.

Memory Map

Fixed I/O Address Ranges Memory Map