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Intel® Atom™ Processor Z3600 and Z3700 Series: Datasheet, V.2

Intel® Atom™ Processor Z3600 and Z3700 Series: Datasheet, V.2

Register Access Methods
Note: Throughout this document Intel® Atom™ processor Z3600 and Z3700 series is referred to as processor or system-on-chip (SoC).

There are six different common register access methods:
• Fixed I/O Register Access
• Fixed Memory Mapped Register Access
• I/O Referenced Register Access
• Memory Referenced Register Access
• PCI Configuration Register Access (Indirect - via Memory or I/O registers)
• Message Bus Register Access (Indirect - via PCI Configuration Registers)

Fixed I/O Register Access
Fixed I/O registers are accessed by specifying their 16-bit address in a PORT IN and/or PORT OUT transaction from the CPU core. This allows direct manipulation of the registers. Fixed I/O registers are unmovable registers in I/O space.

Fixed Memory Mapped Register Access
Fixed Memory Mapped I/O (MMIO) registers are accessed by specifying their 32/36-bit address in a memory transaction from the CPU core. This allows direct manipulation of the registers. Fixed MMIO registers are unmovable registers in memory space.

Read the full Intel® Atom™ Processor Z3600 and Z3700 Series Datasheet, Vol. 2.

Intel® Atom™ Processor Z3600 and Z3700 Series: Datasheet, V.2

Register Access Methods
Note: Throughout this document Intel® Atom™ processor Z3600 and Z3700 series is referred to as processor or system-on-chip (SoC).

There are six different common register access methods:
• Fixed I/O Register Access
• Fixed Memory Mapped Register Access
• I/O Referenced Register Access
• Memory Referenced Register Access
• PCI Configuration Register Access (Indirect - via Memory or I/O registers)
• Message Bus Register Access (Indirect - via PCI Configuration Registers)

Fixed I/O Register Access
Fixed I/O registers are accessed by specifying their 16-bit address in a PORT IN and/or PORT OUT transaction from the CPU core. This allows direct manipulation of the registers. Fixed I/O registers are unmovable registers in I/O space.

Fixed Memory Mapped Register Access
Fixed Memory Mapped I/O (MMIO) registers are accessed by specifying their 32/36-bit address in a memory transaction from the CPU core. This allows direct manipulation of the registers. Fixed MMIO registers are unmovable registers in memory space.

Read the full Intel® Atom™ Processor Z3600 and Z3700 Series Datasheet, Vol. 2.

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