Maxim Integrated Secure Microcontroller - Manual (Page 143)

Secure Microcontroller User’s Guide
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16.8 Command Line Interface
The serial bootstrap loader uses an easy-to-use command line interface that responds to single character
alphabetic commands that are summarized below. There are differences between versions as noted. A
detailed description of each command follows.
COMMAND VERSION FUNCTION
C CRC-16 of RAM All
D Dump Intel hex file All
E Exit loader DS5001FP/DS5002FP
F Fill RAM with a constant All
G Get value from ports All
I Include CRC DS5001FP/DS2251T
K Load 40-bit key DS5000FP/DS2250T/DS5000(T)
L Load Intel Hex file All
N New - invoke Freshness DS5001 series
P Put a value to the ports All (DS5000 after Rev. D4)
R Read configuration All
T Trace (echo) incoming data All
U Unlock security All
V Verify RAM against incoming Hex All
W Write register(s) All
Z Lock All
^C Reset loader All
Xon/Xoff Flow control of serial transmission All
Selected commands require arguments and some commands have optional arguments. In all cases,
arguments are expected to be hexadecimal numbers. In addition, an ASCII control-C character (^C)
causes the serial loader to terminate any function currently being executed and display the command line
prompt. An incoming break character (defined as a received null character (00h) with the stop bit = 0)
causes the serial bootstrap loader to be restarted and the baud rate redetermined.
16.9 Command Line Syntax
Single-letter ASCII characters are recognized as commands. Arguments are represented by hexadecimal
numbers. A hexadecimal number is any sequence of hexadecimal characters. A hexadecimal character
may be a digit, 0 through 9, or one of the letters A through F. A byte will always be the right-most two
digits of a hexadecimal number. An address will always be the right-most four digits of a hexadecimal
number.
BYTE CONVERSION ADDRESS CONVERSION
A
→ 0AH
AB
→ 0ABH
ABC
→ 0BCH
ABCD
→ 0CDH
A
→ 000AH
AB
→ 00ABH
ABC
→ 0ABCH
ABCD
→ 0ABCDH
ABCDE
→ 0BCDEH