OM13008,598 NXP Semiconductors, OM13008,598 Datasheet - Page 312

• Manufacturer Part Number: OM13008,598
• Description: BOARD LPC XPRESSO LPC122X
• Manufacturer: NXP Semiconductors
• Series: LPCXpressor

Specifications of OM13008,598

• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-6642; OM13008

NXP Semiconductors
UM10441
User manual
20.7.5 Read Memory <address> <no. of bytes>
20.7.6 Prepare sector(s) for write operation <start sector number> <end
Table 293. ISP Write to RAM command
The data stream is followed by the command success return code. The check-sum is sent
after transmitting 20 UU-encoded lines. The checksum is generated by adding raw data
(before UU-encoding) bytes and is reset after transmitting 20 UU-encoded lines. The
length of any UU-encoded line should not exceed 61 characters (bytes) i.e. it can hold
45 data bytes. When the data fits in less then 20 UU-encoded lines then the check-sum is
of actual number of bytes sent. The host should compare it with the checksum of the
received bytes. If the check-sum matches then the host should respond with
"OK<CR><LF>" to continue further transmission. If the check-sum does not match then
the host should respond with "RESEND<CR><LF>". In response the ISP command
handler sends the data again.
Table 294. ISP Read Memory command
sector number>
This command makes flash write/erase operation a two step process.
Command
Input
Return Code
Description
Example
Command
Input
Return Code
Description
Example
W
Start Address: RAM address where data bytes are to be written. This address
should be a word boundary.
Number of Bytes: Number of bytes to be written. Count should be a multiple of 4
CMD_SUCCESS |
ADDR_ERROR (Address not on word boundary) |
ADDR_NOT_MAPPED |
COUNT_ERROR (Byte count is not multiple of 4) |
PARAM_ERROR |
CODE_READ_PROTECTION_ENABLED
This command is used to download data to RAM. Data should be in UU-encoded
format. This command is blocked when code read protection is enabled.
"W 268436224 4<CR><LF>" writes 4 bytes of data to address 0x1000 0300.
R
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.
CMD_SUCCESS followed by <actual data (UU-encoded)> |
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
This command is used to read data from RAM or flash memory or the information
block. This command is blocked when code read protection is enabled.
"R 268435456 4<CR><LF>" reads 4 bytes of data from address 0x1000 0000.
All information provided in this document is subject to legal disclaimers.
Rev. 1.1 — 10 March 2011
Chapter 20: LPC122x Flash ISP/IAP
UM10441
© NXP B.V. 2011. All rights reserved.
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