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1.5
HDK Specifications
•
Board supply voltage: 5 V–12 V Vdc
•
Board supply current: 130 mA typ (fully active, CPU at 220 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 IDE
communicates with the board through the embedded emulator or an external JTAG emulator. To start,
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 RM48 family of MCUs have a large byte addressable address space.
space of a RM48L952 microcontroller on the left with specific details of how each region is used by the
HDK on the right. By default, the internal memory sits at the beginning of the address space.
The SDRAM is mapped into CS0 space on the EMIF. CS[4:2] are used for synchronous memory for
example SRAM, NOR Flash, NAND Flash, and so forth.
1.8
Power Supply
The HDK board operates from a single +12 V external power supply connected to the main power input
(P1), a 2.5 mm, barrel-type plug. Internally, the +12 V input is converted into +1.2 V, +3.3 V and +5.0 V
using Texas Instruments swift voltage regulators and PTH power module. 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 module on the board.
The +5.0 V supply is used for ADC power (second option) and USB VBUS.
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.
test point and what the supply is used for.
Test Point Pair
TP14 and TP15
TP16 and TP17
TP18 and TP19
TP20 and TP21
TP22 and TP23
SPNU508B – September 2011 – Revised September 2013
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Table 1-1. RM48 Memory Map
Start Address
End Address
0x0000 0000
0x002F FFFF
0x0800 0000
0x0803 FFFF
0x0840 0000
0x0843 FFFF
0x6000 0000
0x63FF FFFF
0x6400 0000
0x67FF FFFF
0x6800 0000
0x7BFF FFFF
0x8000 0000
0x87FF FFFF
Table 1-2. Power Test Points
Voltage
1.2 V
3.3 V
1.2 V
3.3 V
3.3 V or 5.0 V
(J8 to enable 5 V)
Copyright © 2011–2013, Texas Instruments Incorporated
Table 1-1
shows the address
HDK
Flash
RAM
RAM-ECC
CS2 Async RAM
CS3 Async RAM
CS4 Async RAM
CS0 Sync SDRAM
Table 1-2
shows the voltages for each
Voltage Use
MCU core
MCU IO and logic
MCU PLL
MCU Flash pump
MCU MibADC, and ADREFHI
HDK Specifications
7
Introduction
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