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Ultra-Low Power Arm® ARM926EJ-S™ Processor-Based MPU, 600 MHz, Camera, LCD, 2D Graphics, Dual 10/100 Ethernet, CAN, USB, QSPI, FLEXCOMs, AES, SHA

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22 Debug Unit (DBGU)
22.3 Block Diagram

Introduction
Features
Reference Document
1 Configuration Summary
2 Block Diagram
3 Signal Description
4 Microchip Recommended Power Management Solutions
5 Safety and Security Features
6 Package and Pinout
7 Memories
8 System Controller
9 Peripherals
10 ARM926EJ-S Processor
11 Debug and Test
12 Boot Strategies
13 System Controller Write Protection (SYSCWP)
14 General Purpose Backup Registers (GPBR)
15 Watchdog Timer (WDT)
16 Reset Controller (RSTC)
17 Real-Time Timer (RTT)
18 Real-Time Clock (RTC)
19 Shutdown Controller (SHDWC)
20 Periodic Interval Timer (PIT)
21 64-bit Periodic Interval Timer (PIT64B)
22 Debug Unit (DBGU)
23 OTP Memory Controller (OTPC)
24 Special Function Registers (SFR)
25 Bus Matrix (MATRIX)
26 Advanced Interrupt Controller (AIC)
27 Slow Clock Controller (SCKC)
28 Clock Generator
29 Power Management Controller (PMC)
30 Parallel Input/Output Controller (PIO)
31 External Bus Interface (EBI)
32 DDR-SDRAM Controller (MPDDRC)
33 SDRAM Controller (SDRAMC)
34 Static Memory Controller (SMC)
35 Programmable Multibit Error Correction Code Controller (PMECC)
36 Programmable Multibit ECC Error Location Controller (PMERRLOC)
37 DMA Controller (XDMAC)
38 LCD Controller (LCDC)
39 2D Graphics Engine (GFX2D)
40 Ethernet MAC 10/100 (EMAC)
41 USB Device High Speed Port (UDPHS)
42 USB Host High Speed Port (UHPHS)
43 Audio Class D Amplifier (CLASSD)
44 Inter-IC Sound Multi-Channel Controller (I2SMCC)
45 Synchronous Serial Controller (SSC)
46 Flexible Serial Communication Controller (FLEXCOM)
47 Quad Serial Peripheral Interface (QSPI)
48 Secure Digital MultiMedia Card Controller (SDMMC)
49 Image Sensor Interface (ISI)
50 Controller Area Network (CAN)
51 Timer Counter (TC)
52 Pulse Width Modulation Controller (PWM)
53 Advanced Encryption Standard (AES)
54 Secure Hash Algorithm (SHA)
55 Triple Data Encryption Standard (TDES)
56 Random Number Generator (TRNG)
57 Analog-to-Digital Controller (ADC)
58 Electrical Characteristics
59 Mechanical Characteristics
60 Marking
61 Ordering Information
62 Revision History
Microchip Information

22.3 Block Diagram

Figure 22-1. DBGU Block Diagram

Table 22-1. DBGU Pin Description
Pin Name	Description	Type
DRXD	DBGU Receive Data	Input
DTXD	DBGU Transmit Data	Output

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