NXP Semiconductors LPC1102, User Manual

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User manual Rev. 1 — 20 October 2010 169 of 258
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Chapter 17: LPC1102 Flash memory programming firmware
17.9.1 Register description for signature generation
17.9.1.1 Signature generation address and control registers
These registers control automatic signature generation. A signature can be generated for
any part of the flash memory contents. The address range to be used for generation is
defined by writing the start address to the signature start address register (FMSSTART)
and the stop address to the signature stop address register (FMSSTOP. The start and
stop addresses must be aligned to 128-bit boundaries and can be derived by dividing the
byte address by 16.
Signature generation is started by setting the SIG_START bit in the FMSSTOP register.
Setting the SIG_START bit is typically combined with the signature stop address in a
single write.
Table 182 and Table 183 show the bit assignments in the FMSSTART and FMSSTOP
registers respectively.
Table 181. Register overview: FMC (base address 0x4003 C000)
Name Access Address
offset
Description Reset
value Reference
FMSSTART R/W 0x020 Signature start address register 0 Table 182
FMSSTOP R/W 0x024 Signature stop-address register 0 Table 183
FMSW0 R 0x02C Word 0 [31:0] - Table 184
FMSW1 R 0x030 Word 1 [63:32] - Table 185
FMSW2 R 0x034 Word 2 [95:64] - Table 186
FMSW3 R 0x038 Word 3 [127:96] - Table 187
FMSTAT R 0xFE0 Signature generation status register 0
Section 17.
9.1.3
FMSTATCLR W 0xFE8 Signature generation status clear
register -
Section 17.
9.1.4
Table 182. Flash Module Signature Start register (FMSSTART - 0x4003 C020) bit description
Bit Symbol Description Reset
value
31:17 - Reserved, user software should not write ones to reserved bits.
The value read from a reserved bit is not defined. NA
16:0 START Signature generation start address (corresponds to AHB byte
address bits[20:4]). 0
Table 183. Flash Module Signature Stop register (FMSSTOP - 0x4003 C024) bit description
Bit Symbol Value Description Reset
value
31:18 - Reserved, user software should not write ones to
reserved bits. The value read from a reserved bit is not
defined. NA