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1745D–ATARM–04-Nov-05
AT91M55800A
17. SF: Special Function Registers
The AT91M55800A provides registers which implement the following special functions.
• Chip identification
• RESET status
17.1 Chip Identifier
The following chip identifier values are covered in this datasheet:
17.2 SF User Interface
Chip ID Base Address = 0xFFF00000 (Code Label SF_BASE)
Product Revision Chip ID
AT91M55800A A 0x15580040
Table 17-1. SF Memory Map
Offset Register Name Access Reset State
0x00 Chip ID Register SF_CIDR Read-only Hardwired
0x04 Chip ID Extension Register SF_EXID Read-only Hardwired
0x08 Reset Status Register SF_RSR Read-only
See register
description
0x0C Reserved – – –
0x10 Reserved – – –
0x14 Reserved – – –
0x18 Protect Mode Register SF_PMR Read/Write 0x0