Memory Controller Interface Peripheral

MC (AT91S_MC) 0xFFFFFF00 (AT91C_BASE_MC)

MC Software API (AT91S_MC)

Offset	Field	Description
0x0	MC_RCR	MC Remap Control Register
0x4	MC_ASR	MC Abort Status Register
0x8	MC_AASR	MC Abort Address Status Register
0x10	MC_PUIA[16] (MC_PUIA)	MC Protection Unit Area
0x50	MC_PUP	MC Protection Unit Peripherals
0x54	MC_PUER	MC Protection Unit Enable Register

MC Register Description

MC: AT91_REG MC_RCR MC Remap Control Register

MC AT91C_MC_RCR 0xFFFFFF00

Offset	Name	Description
0	MC_RCB AT91C_MC_RCB	Remap Command Bit 0: No effect. 1: This Command Bit acts on a toggle basis: writing a 1 alternatively cancels and restores the remapping of the page zero memory devices.

MC: AT91_REG MC_ASR MC Abort Status Register

MC AT91C_MC_ASR 0xFFFFFF04

Offset

Name

Description

MC_UNDADD
AT91C_MC_UNDADD

Undefined Addess Abort Status
0: The last abort is not due to the access of an undefined address in the address space.
1: The last abort is due to the access of an undefined address in the address space.

MC_MISADD
AT91C_MC_MISADD

Misaligned Addess Abort Status
0: During the last aborted access, the address was not unaligned.
1: During the last aborted access, the address was unaligned.

MC_MPU
AT91C_MC_MPU

Memory protection Unit Abort Status
0: The last abort is not due to the MPU.
1: The last abort is due to the MPU.

9..8

MC_ABTSZ
AT91C_MC_ABTSZ

Abort Size Status
This field gives the size of the aborted access of the current master.

Value	Label	Description
0	MC_ABTSZ_BYTE AT91C_MC_ABTSZ_BYTE	Byte
1	MC_ABTSZ_HWORD AT91C_MC_ABTSZ_HWORD	Half-word
2	MC_ABTSZ_WORD AT91C_MC_ABTSZ_WORD	Word

11..10

MC_ABTTYP
AT91C_MC_ABTTYP

Abort Type Status
This field gives the type of the aborted access of the current master.

Value	Label	Description
0	MC_ABTTYP_DATAR AT91C_MC_ABTTYP_DATAR	Data Read
1	MC_ABTTYP_DATAW AT91C_MC_ABTTYP_DATAW	Data Write
2	MC_ABTTYP_FETCH AT91C_MC_ABTTYP_FETCH	Code Fetch

MC_MST0
AT91C_MC_MST0

Master 0 Abort Source
0: The last abort was not due to the Master 0.
1: The last abort was due to the Master 0.

MC_MST1
AT91C_MC_MST1

Master 1 Abort Source
0: The last abort was not due to the Master 1.
1: The last abort was due to the Master 1.

MC_SVMST0
AT91C_MC_SVMST0

Saved Master 0 Abort Source
0: No abort due to the Master 0 occurred since the last read of MC_ASR or it is notified in the bit MST0.
1: At least one abort due to the Master 0 occurred since the last read of MC_ASR.

MC_SVMST1
AT91C_MC_SVMST1

Saved Master 1 Abort Source
0: No abort due to the Master 1 occurred since the last read of MC_ASR or it is notified in the bit MST1.
1: At least one abort due to the Master 1 occurred since the last read of MC_ASR.

MC: AT91_REG MC_AASR MC Abort Address Status Register

MC AT91C_MC_AASR 0xFFFFFF08

This register contains the address of the last aborted access

MC: AT91_REG MC_PUIA MC Protection Unit Area

MC AT91C_MC_PUIA 0xFFFFFF10

Offset

Name

Description

1..0

MC_PROT
AT91C_MC_PROT

Protection
The area protection mode is defined as per the following table:

Value	Label	Description
0	MC_PROT_PNAUNA AT91C_MC_PROT_PNAUNA	Privilege: No Access, User: No Access
1	MC_PROT_PRWUNA AT91C_MC_PROT_PRWUNA	Privilege: Read/Write, User: No Access
2	MC_PROT_PRWURO AT91C_MC_PROT_PRWURO	Privilege: Read/Write, User: Read Only
3	MC_PROT_PRWURW AT91C_MC_PROT_PRWURW	Privilege: Read/Write, User: Read/Write

7..4

MC_SIZE
AT91C_MC_SIZE

Internal Area Size

Value	Label	Description
0	MC_SIZE_1KB AT91C_MC_SIZE_1KB	Area size 1KByte
1	MC_SIZE_2KB AT91C_MC_SIZE_2KB	Area size 2KByte
2	MC_SIZE_4KB AT91C_MC_SIZE_4KB	Area size 4KByte
3	MC_SIZE_8KB AT91C_MC_SIZE_8KB	Area size 8KByte
4	MC_SIZE_16KB AT91C_MC_SIZE_16KB	Area size 16KByte
5	MC_SIZE_32KB AT91C_MC_SIZE_32KB	Area size 32KByte
6	MC_SIZE_64KB AT91C_MC_SIZE_64KB	Area size 64KByte
7	MC_SIZE_128KB AT91C_MC_SIZE_128KB	Area size 128KByte
8	MC_SIZE_256KB AT91C_MC_SIZE_256KB	Area size 256KByte
9	MC_SIZE_512KB AT91C_MC_SIZE_512KB	Area size 512KByte
10	MC_SIZE_1MB AT91C_MC_SIZE_1MB	Area size 1MByte
11	MC_SIZE_2MB AT91C_MC_SIZE_2MB	Area size 2MByte
12	MC_SIZE_4MB AT91C_MC_SIZE_4MB	Area size 4MByte
13	MC_SIZE_8MB AT91C_MC_SIZE_8MB	Area size 8MByte
14	MC_SIZE_16MB AT91C_MC_SIZE_16MB	Area size 16MByte
15	MC_SIZE_64MB AT91C_MC_SIZE_64MB	Area size 64MByte

27..10

MC_BA
AT91C_MC_BA

Internal Area Base Address
These bits define the Base Address of the area. Note that the Area Base Address must be aligned with respect to the size of that area.

MC: AT91_REG MC_PUP MC Protection Unit Peripherals

MC AT91C_MC_PUP 0xFFFFFF50

Offset

Name

Description

1..0

MC_PROT
AT91C_MC_PROT

Protection
The area protection mode is defined as per the following table:

Value	Label	Description
0	MC_PROT_PNAUNA AT91C_MC_PROT_PNAUNA	Privilege: No Access, User: No Access
1	MC_PROT_PRWUNA AT91C_MC_PROT_PRWUNA	Privilege: Read/Write, User: No Access
2	MC_PROT_PRWURO AT91C_MC_PROT_PRWURO	Privilege: Read/Write, User: Read Only
3	MC_PROT_PRWURW AT91C_MC_PROT_PRWURW	Privilege: Read/Write, User: Read/Write

MC: AT91_REG MC_PUER MC Protection Unit Enable Register

MC AT91C_MC_PUER 0xFFFFFF54

Offset	Name	Description
0	MC_PUEB AT91C_MC_PUEB	Protection Unit enable Bit 0: The Memory Controller Protection Unit is disabled. 1: The Memory Controller Protection Unit is enabled.