Texas Instruments TMDXRM42HDK, User Manual

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HDK Specifications
1.5 HDK Specifications
• Board supply voltage: 5 V to 12 V DC
• Board supply current: 130 mA typ (fully active, CPU at 100 MHz)
• Dimensions: 4.90” x 4.30” x 0.85” (LxWxH)
1.6 Basic Operation
The HDK is designed to work with TI’s Code Composer Studio and other third party ARM IDEs. The IDEs
communicate with the board through the embedded emulator or an external JTAG emulator. To get
started, follow the instructions in the Quick Start Guide to install Hercules specific software. This process
will install all of the necessary development tools, documentation, and drivers.
1.7 Memory Map
The RM42 family of MCUs have a large byte addressable address space. Table 1-1 shows the address
space of a RM42L432 microcontroller on the left with specific details of how each region is used on the
right. On-chip Flash memory starts at the beginning of the address space where the exception vector table
is located.
Table 1-1. RM42L432 Memory Map
Start Address End Address HDK
0x0000 0000 0x0005 FFFF 384KB Flash
0x0800 0000 0x0800 7FFF 32KB RAM
0x0840 0000 0x0840 7FFF RAM-ECC
1.8 Power Supply
The HDK board operates from 5V supplied from the USB connector (J4) or +5 V to +12 V supplied
from the power supply connected to the main power input (P1), a 2.5 MM, barrel-type plug. Internally, the
power input is converted into +1.2 V, +3.3 V using Texas Instruments voltage regulators. The +1.2 V
supply is used for the MCU core while the +3.3 V supply is used for the MCU's I/O buffers and other
component on the board.
The power used for operation is determined by the options listed in Table 1-2 .
Table 1-2. Power Supply Selection
Power Used for USB VBUS (+5 V) Power From P1(5 V to 12 V)
the Board (USB Cable is Plugged or Not) (Power Cable is Plugged or Not)
From P1 ON ON
From P1 OFF ON
From VBUS ON OFF
There are multiple power test points on the HDK board. The three main test point pairs provide a
convenient mechanism to check the HDK’s current for each supply.
Table 1-3 shows the voltages for each
test point and what the supply is used for.
Table 1-3. Power Test Points
Test Point Pair Voltage Voltage Use
TP11 and TP12 1.2 V MCU core
TP3 and TP4 3.3 V MCU IO and logic
TP22 and TP23 3.3 V MCU ADC power
7 SPNU567 – September 2012 Introduction
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