Datasheet

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4.0 Register Set (Continued)
DP83815
4.2.19 Boot ROM Address Register
The BRAR is used to setup the address for an access to an external ROM/FLASH device.
4.2.20 Boot ROM Data Register
The BRDR is used to read and write ROM/FLASH data from the data from/to an external ROM/FLASH device.
4.2.21 Silicon Revision Register
Tag: BRAR Size: 32 bits Hard Reset: FFFFFFFFh
Offset: 0050h Access: Read Write Soft Reset: unchanged
Bit Bit Name Description
31 AUTOINC Auto-Increment
When set, the contents of ADDR will auto increment with every 32-bit access to the BRDR register.
30-16 unused
15-0 ADDR Boot ROM Address
16-bit address used to access the external Boot ROM.
Tag: BRDR Size: 32 bits Hard Reset: undefined
Offset: 0054h Access: Read Write Soft Reset: undefined
Bit Bit Name Description
31-0 DATA Boot ROM Data
Access port to external Boot ROM. Software can use BRAR and BRDR to read (and write if FLASH
memory is used) the external Boot ROM. All accesses must be 32-bits wide and aligned on 32-bit
boundaries.
Tag: SRR Size: 32 bits Hard Reset: as defined
Offset: 0058h Access: Read Only Soft Reset: unchanged
Bit Bit Name Description
31-16 unused
(reads return 0)
15-0 Rev Revision Level
SRR register value for the DP83815 silicon.
DP83815CVNG 00000302h
DP83815DVNG/UJB 00000403h
Obsolete