This is a demo board for the Freescale Cortex-M0+ CPU.

The FRDM-KL25Z doesn't come with header sockets, the following items were bought to fulfil this requirement.

1 x TE CONNECTIVITY / AMP-215307-6-SOCKET, VERTICAL, 2ROW, 12WAY
2 x TE CONNECTIVITY / AMP-215307-8-SOCKET, VERTICAL, 2ROW, 16WAY
1 x TE CONNECTIVITY / AMP-1-215307-0-SOCKET, VERTICAL, 2ROW, 20WAY

One day I will solder them in place.

Out of the box this board doesn't work with anything resembling a modern day computer so I never used it until 8 years after buying it in 2014.

Without an upgrade it doesn't work in any variety of Linux or Windows after 7. The fact that it doesn't work with anything except XP and 7 means it's very hard to upgrade.

You have to download new firmware to upgrade the bootloader from version 0.11 to something higher that will work with a modern PC. Somehow I managed to get it to upgrade using Windows XP in a VirtualBox VM.

Once the upgrade magically worked I further updated it from OpenSDA to J-Link for NXP.

The files I think I used to proceed were (I have a bad memory but this is probably close):

DEBUG-APP_Pemicro_v108.SDA
BOOTUPDATEAPP_Pemicro_v111.SDA
12_OpenSDA_FRDM-KL25Z.bin

Good luck.

frdm-kl25z.jlink

USB 000000123456
Device MKL25Z128xxx4
SelectInterface SWD
Speed 4000
Reset
Exit

/opt/JLink/JLinkExe ./frdm-kl25z.jlink
SEGGER J-Link Commander V7.82 (Compiled Oct 13 2022 13:42:33)
DLL version V7.82, compiled Oct 13 2022 13:42:08


J-Link Command File read successfully.
Processing script file...
J-Link>USB 000000123456
Connecting to J-Link via USB...O.K.
Firmware: J-Link OpenSDA compiled May 27 2019 10:59:53
Hardware version: V1.00
J-Link uptime (since boot): N/A (Not supported by this model)
S/N: 621000000
VTref=3.300V
J-Link>Device MKL25Z128xxx4
J-Link>SelectInterface SWD
Selecting SWD as current target interface.
J-Link>Speed 4000
Selecting 4000 kHz as target interface speed
J-Link>Reset
Target connection not established yet but required for command.
Device "MKL25Z128XXX4" selected.


Connecting to target via SWD
ConfigTargetSettings() start
ConfigTargetSettings() end
InitTarget() start
InitTarget()
InitTarget() end
Found SW-DP with ID 0x0BC11477
DPv0 detected
CoreSight SoC-400 or earlier
AP map detection skipped. Manually configured AP map found.
AP[0]: AHB-AP (IDR: Not set)
AP[1]: MEM-AP (IDR: Not set)
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xF0002000
CPUID register: 0x410CC600. Implementer code: 0x41 (ARM)
Found Cortex-M0 r0p0, Little endian.
FPUnit: 2 code (BP) slots and 0 literal slots
CoreSight components:
ROMTbl[0] @ F0002000
[0][0]: F0000000 CID B105900D PID 000BB932 MTB-M0+
[0][1]: F0001000 CID B105900D PID 0008E000 MTBDWT
[0][2]: E00FF000 CID B105100D PID 000BB4C0 ROM Table
ROMTbl[1] @ E00FF000
[1][0]: E000E000 CID B105E00D PID 000BB008 SCS
[1][1]: E0001000 CID B105E00D PID 000BB00A DWT
[1][2]: E0002000 CID B105E00D PID 000BB00B FPB
Cortex-M0 identified.
Reset delay: 0 ms
Reset type NORMAL: Resets core & peripherals via SYSRESETREQ & VECTRESET bit.
Reset: Halt core after reset via DEMCR.VC_CORERESET.
Reset: Reset device via AIRCR.SYSRESETREQ.
J-Link>Exit

Script processing completed.

Manual and schematic