Datasheet

Table 2. K20 family summary (continued)
Sub-Family
Performance (MHz)
Memory Package
Flash (KB)
FlexNVM (KB)
SRAM (KB)
EEPROM/ FlexRAM (KB)
32 QFN (5x5) 48 QFN (7x7)
48 LQFP (7x7)
64 BGA (5x5)
64 LQFP (10x10) 80 LQFP (12x12)
81 BGA (8x8)
100 LQFP (14x14)
120 WLCSP (5.3x5.3)
121 BGA (8x8)
144 LQFP (20x20)
144 BGA (13x13)
K20X 50 32 32 8 2 + + + + + — — — — — — —
50 64 32 16 2 + + + + + — — — — — — —
50 128 32 16 2 + + + + + — — — — — — —
50 128 64 32 4 — — + — + + — — — + — —
50 256 64 32 4 — — + — + + — — — + — —
72 64 32 16 2 — — — — + + — — — + — —
72 128 32 32 2 — — — — + + — + — + — —
72 256 32 64 2 — — — — + + — + — + — —
100 128 128 32 4 — — — — — — — — — — + +
100 256 256 64 4 — — — — — — — — — + + +
120 512 512 128 16 — — — — — — — — — — + +
4.2 FlexMemory
Freescale’s new FlexMemory technology provides an extremely versatile and powerful solution for designers seeking on-
chip EEPROM and/or additional program or data flash memory. As easy and as fast as SRAM, it requires no user or system
intervention to complete programming and erase functions when used as high endurance byte-write/byte-erase EEPROM.
EEPROM array size can also be configured for improved endurance to suit application requirements. FlexMemory can also
provide additional flash memory (FlexNVM) for data or program storage in parallel with the main program flash.
The key features of FlexMemory include:
• Configurability for designer:
• EEPROM array size and number of write/erase cycles
• Program or data flash size
• EEPROM endurance of 10M write/erase cycles possible over full voltage and temperature range
• Seamless EEPROM read/write operations: simply write or read a memory address
• High-speed byte, 16-bit, and 32-bit write/erase operations to EEPROM
• Eliminates the costs associated with external EEPROM ICs, and the software headaches and resource (CPU/flash/
RAM) impact of EEPROM emulation schemes
• Storage for large data tables or bootloader
• Read-while-write operation with main program flash memory
• Minimum write voltage 1.71V
Features
K20 Family Product Brief, Rev. 11, 08/2012
Freescale Semiconductor, Inc. 7