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vectors
0x1C00_0000
.noinit
0x1C00_0140
.text
0x1C00_0198
0x1C00_8000
ROM use
0x1FFF_A000
Available, not used by ROM
0x1FFF_B5C8
0x2001 _2000
32 KB of ROM
KB of RAM
128
Figure 14-1. Kinetis Bootloader ROM/RAM Memory Maps
14.3.2 The Kinetis Bootloader Configuration Area (BCA)
The Kinetis Bootloader reads data from the Bootloader Configuration Area (BCA) to
configure various features of the bootloader. The BCA resides in flash memory at offset
0x3C0, and provides all of the parameters needed to configure the Kinetis Bootloader
operation. For uninitialized flash, the Kinetis Bootloader uses a predefined default
configuration. A host application can use the Kinetis Bootloader to program the BCA for
use during subsequent initializations of the bootloader.
Table 14-3. Configuration Fields for the Kinetis Bootloader
Offset
Size (bytes)
Configuration Field
Description
0x00 - 0x03
4
tag
Magic number to verify bootloader
configuration is valid. Must be set to
'kcfg'.
0x04 - 0x07
4
crcStartAddress
Start address for application image
CRC check. To generate the CRC,
refer to the CRC chapter. If the bits
are all set then Kinetis bootloader by
default will not perform any CRC
check.
0x08 - 0x0B
4
crcByteCount
Byte count for application image CRC
check. If the bits are all set then
Kinetis bootloader by default will not
perform any CRC check.
0x0C - 0x0F
4
crcExpectedValue
Expected CRC value for application
CRC check. If the bits are all set then
Kinetis bootloader by default will not
perform any CRC check.
0x10
1
enabledPeripherals
Bitfield of peripherals to enable.
Table continues on the next page...
Chapter 14 Kinetis ROM Bootloader
K32 L2A Reference Manual, Rev. 2, 01/2020
NXP Semiconductors
251
Содержание K32 L2A Series
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