AT91SAM9G20 datasheet(49/832 Pages) ATMEL

номер детали	AT91SAM9G20

подробное описание детали	AT91 ARM Thumb Microcontrollers

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6384D–ATARM–04-May-09

AT91SAM9G20 Preliminary

11.4

CP15 Coprocessor

Coprocessor 15, or System Control Coprocessor CP15, is used to configure and control all the

items in the list below:

• ARM9EJ-S

• Caches (ICache, DCache and write buffer)

•TCM

•MMU

• Other system options

To control these features, CP15 provides 16 additional registers. See Table 11-5.

Notes:

1. Register locations 0,5, and 13 each provide access to more than one register. The register

accessed depends on the value of the opcode_2 field.

2. Register location 9 provides access to more than one register. The register accessed depends

on the value of the CRm field.

Table 11-5.

CP15 Registers

Name

Read/Write

ID Code(1)

Read/Unpredictable

Cache type(1)

Read/Unpredictable

TCM status(1)

Read/Unpredictable

Control

Read/write

Translation Table Base

Read/write

Domain Access Control

Read/write

Reserved

None

Data fault Status(1)

Read/write

Instruction fault status(1)

Read/write

Fault Address

Read/write

Cache Operations

Read/Write

TLB operations

Unpredictable/Write

cache lockdown(2)

Read/write

TCM region

Read/write

TLB lockdown

Read/write

Reserved

None

Reserved

None

FCSE PID(1)

Read/write

Context ID(1)

Read/Write

Reserved

None

Test configuration

Read/Write

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