Table of Contents
1 Ordering parts...........................................................................4
6.1 Core modules....................................................................23
6.1.1 Debug trace timing specifications.........................23
6.1.2 JTAG electricals....................................................24
6.2 System modules................................................................26
6.3 Clock modules...................................................................26
6.3.1 MCG specifications...............................................26
6.3.2 Oscillator electrical specifications.........................29
6.3.3 32kHz Oscillator Electrical Characteristics............31
6.4 Memories and memory interfaces.....................................32
6.4.1 Flash electrical specifications................................32
6.4.2 EzPort Switching Specifications............................36
6.5 Security and integrity modules..........................................37
6.6 Analog...............................................................................37
6.6.1 ADC electrical specifications.................................38
6.6.2 CMP and 6-bit DAC electrical specifications.........46
6.6.3 12-bit DAC electrical characteristics.....................48
6.6.4 Op-amp electrical specifications...........................51
6.6.5 Transimpedance amplifier electrical
1.1 Determining valid orderable parts......................................4
2 Part identification......................................................................4
2.1 Description.........................................................................4
2.2 Format...............................................................................4
2.3 Fields.................................................................................4
2.4 Example............................................................................5
3 Terminology and guidelines......................................................5
3.1 Definition: Operating requirement......................................5
3.2 Definition: Operating behavior...........................................6
3.3 Definition: Attribute............................................................6
3.4 Definition: Rating...............................................................7
3.5 Result of exceeding a rating..............................................7
3.6 Relationship between ratings and operating
requirements......................................................................7
3.7 Guidelines for ratings and operating requirements............8
3.8 Definition: Typical value.....................................................8
3.9 Typical value conditions....................................................9
4 Ratings......................................................................................10
4.1 Thermal handling ratings...................................................10
4.2 Moisture handling ratings..................................................10
4.3 ESD handling ratings.........................................................10
4.4 Voltage and current operating ratings...............................10
5 General.....................................................................................11
5.1 AC electrical characteristics..............................................11
5.2 Nonswitching electrical specifications...............................12
5.2.1 Voltage and current operating requirements.........12
5.2.2 LVD and POR operating requirements.................13
5.2.3 Voltage and current operating behaviors..............13
5.2.4 Power mode transition operating behaviors..........14
5.2.5 Power consumption operating behaviors..............15
5.2.6 Designing with radiated emissions in mind...........19
5.2.7 Capacitance attributes..........................................19
5.3 Switching specifications.....................................................20
5.3.1 Device clock specifications...................................20
5.3.2 General switching specifications...........................20
5.4 Thermal specifications.......................................................21
5.4.1 Thermal operating requirements...........................21
5.4.2 Thermal attributes.................................................22
6 Peripheral operating requirements and behaviors....................23
specifications — full range....................................52
6.6.6 Transimpedance amplifier electrical
specifications — limited range..............................54
6.6.7 Voltage reference electrical specifications............54
6.7 Timers................................................................................56
6.8 Communication interfaces.................................................56
6.8.1 USB electrical specifications.................................56
6.8.2 USB DCD electrical specifications........................56
6.8.3 USB VREG electrical specifications......................56
6.8.4 DSPI switching specifications (limited voltage
range)....................................................................57
6.8.5 DSPI switching specifications (full voltage range).59
6.8.6 I2C switching specifications..................................60
6.8.7 UART switching specifications..............................61
6.8.8 I2S/SAI Switching Specifications..........................61
6.9 Human-machine interfaces (HMI)......................................65
6.9.1 TSI electrical specifications...................................65
6.9.2 LCD electrical characteristics................................66
7 Dimensions...............................................................................67
7.1 Obtaining package dimensions.........................................67
8 Pinout........................................................................................68
8.1 K51 Signal Multiplexing and Pin Assignments..................68
K51 Sub-Family Data Sheet, Rev. 2, 4/2012.
2
Freescale Semiconductor, Inc.
FREESCALE [ Freescale ]
