Kinetis K21: 120MHz Cortex-M4F up to 1MB Flash (121pin)
Kinetis K21 Data Sheet: 120MHz high-performance ArmВ® CortexВ®-M4F microcontroller(MCU), USB, advanced security/anti-tamper, up to 1MB Flash/128KB SRAM, 121pin
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Kinetis K21: 120MHz Cortex-M4F up to 1MB Flash (121pin)
Kinetis K21 Data Sheet: 120MHz high-performance ArmВ® CortexВ®-M4F microcontroller(MCU), USB, advanced security/anti-tamper, up to 1MB Flash/128KB SRAM, 121pin