NXP Semiconductors LPC24XX UM10237 - Manual (Page 686)

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User manual Rev. 04 — 26 August 2009 686 of 792
NXP Semiconductors
UM10237
Chapter 30: LPC24XX Flash memory programming firmware
"OK" to continue further transmission. If the check-sum does not match then
the host should respond with "RESEND". In response the ISP command
handler sends the data again.
9.6 Prepare sector(s) for write operation
sector number>
This command makes Flash write/erase operation a two step process.
Table 609. ISP Read Memory command
Command R
Input Start Address: Address from where data bytes are to be read. This address
should be a word boundary.
Number of Bytes: Number of bytes to be read. Count should be a multiple of 4.
Return Code CMD_SUCCESS followed by |
ADDR_ERROR (Address not on word boundary) |
ADDR_NOT_MAPPED |
COUNT_ERROR (Byte count is not a multiple of 4) |
PARAM_ERROR |
CODE_READ_PROTECTION_ENABLED
Description This command is used to read data from RAM or Flash memory. This command is
blocked when code read protection is enabled.
Example "R 1073741824 4" reads 4 bytes of data from address 0x4000 0000.
Table 610. ISP Prepare sector(s) for write operation command
Command P
Input Start Sector Number
End Sector Number: Should be greater than or equal to start sector number.
Return Code CMD_SUCCESS |
BUSY |
INVALID_SECTOR |
PARAM_ERROR
Description This command must be executed before executing "Copy RAM to Flash" or
"Erase Sector(s)" command. Successful execution of the "Copy RAM to Flash" or
"Erase Sector(s)" command causes relevant sectors to be protected again. The
boot block can not be prepared by this command. To prepare a single sector use
the same "Start" and "End" sector numbers.
Example "P 0 0" prepares the Flash sector 0.