vectors
0x1C00_0000
.noinit
0x1C00_00C0
.text
0x1C00_010 C
0x1C00_4000
ROM use
0x1FFF_F800
Available, not used by ROM
0x2000_0688
0x2000_1800
16 KB of ROM
8KB of RAM
Figure 22-1. Kinetis Bootloader ROM/RAM Memory Maps
22.3.2 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 22-2. 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
-
Reserved in
0x08 - 0x0B
4
-
Reserved in
0x0C - 0x0F
4
-
Reserved in
0x10
1
enabledPeripherals
Bitfield of peripherals to enable.
bit 0 LPUART
bit 1 LPI2C
bit 2 LPSPI
Kinetis bootloader will enable the
peripheral if corresponding bit is set to
1.
Table continues on the next page...
Functional Description
Kinetis KE1xZ256 Sub-Family Reference Manual, Rev. 3, 07/2018
472
NXP Semiconductors
Summary of Contents for Kinetis KE1xZ256
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