Using JLink with NXP MK64FX512VLL12

This is the command:

$ sudo JLinkExe -if swd
SEGGER J-Link Commander V6.46h (Compiled Jun 28 2019 17:19:57)
DLL version V6.46h, compiled Jun 28 2019 17:19:50
Connecting to J-Link via USB…O.K.
Firmware: J-Link ARM V8 compiled Nov 28 2014 13:44:46
Hardware version: V8.00
S/N: 268XXXXXX
License(s): FlashBP, GDB
OEM: SEGGER-EDU
VTref=3.060V
Type "connect" to establish a target connection, '?' for help
J-Link>connect
Please specify device / core. : ATSAML21G18
Type '?' for selection dialog
Device>MK64FX512XXX12
Specify target interface speed [kHz]. : 4000 kHz
Speed>
Device "MK64FX512XXX12" selected.
Connecting to target via SWD
InitTarget()
Protection bytes in flash at addr. 0x400 - 0x40F indicate that readout protection is set.
For debugger connection the device needs to be unsecured.
Note: Unsecuring will trigger a mass erase of the internal flash.
Device will be unsecured now.
Found SW-DP with ID 0x2BA01477
Scanning AP map to find all available APs
AP[2]: Stopped AP scan as end of AP map has been reached
AP[0]: AHB-AP (IDR: 0x24770011)
AP[1]: JTAG-AP (IDR: 0x001C0000)
Iterating through AP map to find AHB-AP to use
AP[0]: Core found
AP[0]: AHB-AP ROM base: 0xE00FF000
CPUID register: 0x410FC241. Implementer code: 0x41 (ARM)
Found Cortex-M4 r0p1, Little endian.
FPUnit: 6 code (BP) slots and 2 literal slots
CoreSight components:
ROMTbl[0] @ E00FF000
ROMTbl[0][0]: E000E000, CID: B105E00D, PID: 000BB00C SCS-M7
ROMTbl[0][1]: E0001000, CID: B105E00D, PID: 003BB002 DWT
ROMTbl[0][2]: E0002000, CID: B105E00D, PID: 002BB003 FPB
ROMTbl[0][3]: E0000000, CID: B105E00D, PID: 003BB001 ITM
ROMTbl[0][4]: E0040000, CID: B105900D, PID: 000BB9A1 TPIU
ROMTbl[0][5]: E0041000, CID: B105900D, PID: 000BB925 ETM
ROMTbl[0][6]: E0042000, CID: B105900D, PID: 003BB907 ETB
ROMTbl[0][7]: E0043000, CID: B105900D, PID: 001BB908 CSTF
Cortex-M4 identified.
J-Link>

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