Freescale Semiconductor, Inc.
Data Sheet: Technical Data
Document Number K21P121M120SF5V2
Rev 4, 05/2014
Kinetis K21F Sub-Family Data
Sheet
120 MHz ARM® Cortex®-M4-based Microcontroller with FPU
The K21 product family members are optimized for cost-sensitive
applications requiring low-power, USB connectivity, processing
efficiency with floating point unit and the need for extensive
tamper protection, such as Electronic Point of Sales. It shares
the comprehensive enablement and scalability of the Kinetis
family. This product offers:
MK21FX512AVMC12
MK21FN1M0AVMC12
• Up to 1 MB of flash memory with up to 128 KB of SRAM
121 MAPBGA
• DryIce Tamper Detection with active/passive pin,
8 x 8 x 1.4 mm Pitch 0.65 mm
temperature, clock, supply voltage monitoring
• Run power consumption down to 279 μA/MHz. Static
power consumption down to 5.1 μA with full state retention
and 5 μs wakeup. Lowest Static mode down to 268 nA
• USB LS/FS OTG 2.0 with embedded 3.3 V, 120 mA LDO voltage regulator
Performance
• Up to 120 MHz ARM Cortex-M4-based core with DSP
instructions delivering 1.25 Dhrystone MIPS per MHz
Memories and memory interfaces
• Up to 1 MB program flash memory and 128 KB RAM
• FlexBus external bus interface
System peripherals
• Multiple low-power modes; low leakage wakeup unit
• Memory protection unit with multi-master protection
• 16-channel DMA controller
• External watchdog monitor and software watchdog
Security and integrity modules
• Hardware CRC module
• Tamper detect and secure storage
• Hardware random-number generator
• Hardware encryption
• 128-bit unique identification (ID) number per chip
Analog modules
• Two 16-bit SAR ADCs
• Two 12-bit DACs
• Three analog comparators (CMP)
• Voltage reference
Communication interfaces
• USB full-/low-speed On-the-Go controller
• USB Device Charger detect
• Controller Area Network (CAN) module
• Three SPI modules
• Three I2C modules
• Six UART modules
• Secure Digital host controller (SDHC)
• I2S module
Timers
• Two 8-channel Flex-Timers (PWM/Motor Control)
• Two 2-channel Flex-Timers (PWM/Quad Decoder)
• Periodic interrupt timers and 16-bit low-power timer
• Carrier modulator transmitter
• Real-time clock
• Programmable delay block
Clocks
• 3 to 32 MHz and 32 kHz crystal oscillator
• PLL, FLL, and multiple internal oscillators
Operating Characteristics
• Voltage range: 1.71 to 3.6 V
• Flash write voltage range: 1.71 to 3.6 V
• Temperature range (ambient): –40 to 105°C
Freescale reserves the right to change the detail specifications as may be required to
permit improvements in the design of its products. © 2013–2014 Freescale
Semiconductor, Inc. All rights reserved.
Ordering Information
1
Part Number
Flash (KB)
MK21FX512AVMC12
MK21FN1M0AVMC12
512 KB
1 MB
Memory
SRAM (KB)
128
128
81
81
Maximum number of I\O's
1. To confirm current availability of ordererable part numbers, go to
http://www.freescale.com
and perform a part number
search.
Related Resources
Type
Selector
Guide
Product Brief
Reference
Manual
Data Sheet
Package
drawing
Description
The Freescale Solution Advisor is a web-based tool that features
interactive application wizards and a dynamic product selector.
The Product Brief contains concise overview/summary information to
enable quick evaluation of a device for design suitability.
The Reference Manual contains a comprehensive description of the
structure and function (operation) of a device.
The Data Sheet includes electrical characteristics and signal
connections.
Package dimensions are provided in package drawings.
Resource
Solution Advisor
K20PB
1
K21P121M50SF5V2RM
1
K21P121M50SF5V2
1
• MAPBGA 121-pin:
98ASA00344D
1
1. To find the associated resource, go to
http://www.freescale.com
and perform a search using this term.
2
Freescale Semiconductor, Inc.
Kinetis K21F Sub-Family Data Sheet, Rev4, 05/2014.
Kinetis K21/22F Family
ARM
®
Cortex™-M4
Core
System
Internal
and external
watchdogs
Debug
interfaces
Interrupt
controller
DSP
Floating-
point unit
Memory
protection
Memories and Memory Interfaces
Program
flash
Clocks
Phase-
locked loop
Frequency-
locked loop
Low/high
frequency
oscillators
RAM
FlexMemory
Serial
programming
interface
External
bus
DMA
Low-leakage
wakeup
Internal
reference
clocks
and Integrity
CRC
Random
number
generator
Hardware
encryption
Tamper
detect
Security
Analog
16-bit ADC
x2
Timers
Timers
x4 (20ch)
Communication Interfaces
I
C
x2
UART
x6
SPI
x3
CAN
x1
2
Human-Machine
Interface (HMI)
GPIO
I
S
x1
Secure
Digital
USB OTG
LS/FS/HS
2
Analog
comparator
x3
6-bit DAC
x3
12-bit DAC
Carrier
modulator
transmitter
Programmable
delay block
Periodic
interrupt
timers
Low power
timer
Independent
real-time
clock
USB LS/FS
transceiver
USB charger
detect
USB voltage
regulator
Voltage
reference
LEGEND
Available only in K21
Figure 1. K20 block diagram
Kinetis K21F Sub-Family Data Sheet, Rev4, 05/2014.
3
Freescale Semiconductor, Inc.
4
Freescale Semiconductor, Inc.
Kinetis K21F Sub-Family Data Sheet, Rev4, 05/2014.
Table of Contents
1 Ratings.................................................................................. 6
1.1 Thermal handling ratings............................................... 6
1.2 Moisture handling ratings...............................................6
1.3 ESD handling ratings..................................................... 6
1.4 Voltage and current operating ratings............................6
2 General................................................................................. 7
2.1 AC electrical characteristics...........................................7
2.2 Nonswitching electrical specifications............................8
2.2.1
Voltage and current operating requirements... 8
2.2.2
LVD and POR operating requirements............ 9
2.2.3
Voltage and current operating behaviors.........10
2.2.4
Power mode transition operating behaviors.... 11
2.2.5
Power consumption operating behaviors........ 12
2.2.6
EMC radiated emissions operating behaviors. 16
2.2.7
Designing with radiated emissions in mind......17
2.2.8
Capacitance attributes..................................... 17
2.3 Switching specifications................................................. 17
2.3.1
Device clock specifications.............................. 17
2.3.2
General switching specifications..................... 18
2.4 Thermal specifications................................................... 19
2.4.1
Thermal operating requirements..................... 19
2.4.2
Thermal attributes............................................19
3 Peripheral operating requirements and behaviors................ 20
3.1 Core modules................................................................ 20
3.1.1
Debug trace timing specifications.................... 21
3.1.2
JTAG electricals.............................................. 21
3.2 System modules............................................................ 24
3.3 Clock modules............................................................... 24
3.3.1
MCG specifications..........................................24
3.3.2
Oscillator electrical specifications.................... 27
3.3.3
32 kHz oscillator electrical characteristics....... 29
3.4 Memories and memory interfaces................................. 29
3.4.1
3.4.2
3.4.3
Flash (FTFE) electrical specifications..............29
EzPort switching specifications....................... 34
Flexbus switching specifications......................35
3.5 Security and integrity modules.......................................38
3.5.1
DryIce Tamper Electrical Specifications.......... 38
3.6 Analog............................................................................39
3.6.1
ADC electrical specifications........................... 39
3.6.2
CMP and 6-bit DAC electrical specifications... 43
3.6.3
12-bit DAC electrical characteristics................ 46
3.6.4
Voltage reference electrical specifications...... 49
3.7 Timers............................................................................ 50
3.8 Communication interfaces............................................. 50
3.8.1
USB electrical specifications........................... 50
3.8.2
USB DCD electrical specifications...................51
3.8.3
USB VREG electrical specifications................ 51
3.8.4
CAN switching specifications...........................52
3.8.5
DSPI switching specifications (limited voltage
range).............................................................. 52
3.8.6
3.8.7
3.8.8
3.8.9
3.8.10
DSPI switching specifications (full voltage
range).............................................................. 54
I2C switching specifications.............................55
UART switching specifications........................ 56
SDHC specifications........................................ 56
I2S switching specifications............................. 57
4 Dimensions........................................................................... 69
4.1 Obtaining package dimensions......................................69
5 Pinout.................................................................................... 70
5.1 K21 Signal Multiplexing and Pin Assignments...............70
5.2 K21 Pinouts................................................................... 75
6 Revision History.................................................................... 76
7 Copyright............................................................................... 0
8 Legal..................................................................................... 0
Kinetis K21F Sub-Family Data Sheet, Rev4, 05/2014.
5
Freescale Semiconductor, Inc.
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