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Ultra-Low-Power Arm® Cortex®-A5 Core-Based MPU, Graphics Interface, Ethernet 10/100, IEEE®1588, CAN-FD, USB, AEC-Q100 Grade 2
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65
Security Module (SECUMOD)
65.5
Functional Description
65.5.4
Protection Mechanisms
65.5.4.2
JTAG Prevention
Description
Features
1
Configuration Summary
2
Block Diagram
3
Signal Description
4
Microchip Recommended Power Management Solutions
5
Automotive Quality Grade
6
Safety and Security Features
7
Pinout
8
Power Considerations
9
Memories
10
Event System
11
System Controller
12
Peripherals
13
Chip Identifier (CHIPID)
14
Cortex-A5 Processor (ARM)
15
L2 Cache Controller (L2CC)
16
Debug and Test Features
17
Standard Boot Strategies
18
CPU System Bus Matrix (CPUMX)
19
Matrix (H64MX/H32MX)
20
Special Function Registers (SFR)
21
Special Function Registers Backup (SFRBU)
22
Advanced Interrupt Controller (AIC)
23
Watchdog Timer (WDT)
24
Reset Controller (RSTC)
25
Shutdown Controller (SHDWC)
26
Periodic Interval Timer (PIT)
27
Real-time Clock (RTC)
28
System Controller Write Protection (SYSCWP)
29
Slow Clock Controller (SCKC)
30
Peripheral Touch Controller (PTC)
31
Low Power Asynchronous Receiver (RXLP)
32
Clock Generator
33
Power Management Controller (PMC)
34
Parallel Input/Output Controller (PIO)
35
External Memories
36
DDR-SDRAM Controller (MPDDRC)
37
Static Memory Controller (SMC)
38
DMA Controller (XDMAC)
39
LCD Controller (LCDC)
40
Ethernet MAC (GMAC)
41
USB Device High Speed Port (UDPHS)
42
USB Host High Speed Port (UHPHS)
43
Audio Class D Amplifier (CLASSD)
44
Inter-IC Sound Controller (I2SC)
45
Synchronous Serial Controller (SSC)
46
Two-wire Interface (TWIHS)
47
Flexible Serial Communication Controller (FLEXCOM)
48
Universal Asynchronous Receiver Transmitter (UART)
49
Serial Peripheral Interface (SPI)
50
Quad Serial Peripheral Interface (QSPI)
51
Secure Digital MultiMedia Card Controller (SDMMC)
52
Image Sensor Controller (ISC)
53
Controller Area Network (MCAN)
54
Timer Counter (TC)
55
Pulse Density Modulation Interface Controller (PDMIC)
56
Pulse Width Modulation Controller (PWM)
57
Secure Fuse Controller (SFC)
58
Integrity Check Monitor (ICM)
59
Advanced Encryption Standard Bridge (AESB)
60
Advanced Encryption Standard (AES)
61
Secure Hash Algorithm (SHA)
62
Triple Data Encryption Standard (TDES)
63
True Random Number Generator (TRNG)
64
Analog Comparator Controller (ACC)
65
Security Module (SECUMOD)
65.1
Description
65.2
Embedded Characteristics
65.3
Block Diagram
65.4
Product Dependencies
65.5
Functional Description
65.5.1
Memory Mapping
65.5.2
Scrambling Keys
65.5.3
Internal Random Number Generator (IRNG)
65.5.4
Protection Mechanisms
65.5.4.1
PIO Backup Controller
65.5.4.2
JTAG Prevention
65.5.4.2.1
Debug Interface Access Prevention
65.5.4.2.2
Physical Restrictions for JTAG Debug Mode
65.5.4.2.3
Software Restrictions for JTAG Debug Mode
65.5.4.2.4
Software Prevention for JTAG Debug
65.5.5
Erasing Secure Memories
65.5.6
Operating Modes
65.5.7
Activation or Deactivation of Protections
65.5.8
Power-Up Reset
65.6
Register Summary
66
Analog-to-Digital Controller (ADC)
67
Electrical Characteristics
68
Mechanical Characteristics
69
Marking
70
Ordering Information
71
Revision History
Microchip Information
65.5.4.2 JTAG Prevention
