Rainbow Electronics MAXQ3108 - Manual (Page 63)

MAXQ3108
Low-Power, Dual-Core Microcontroller
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In-Application Flash
Programming
From user code, flash is programmed using the ROM
utility functions from either C or assembly language.
The flash can be programmed one word at a time if so
desired. Once a new user code routine has been pro-
grammed and verified in flash, the link or call address
to that routine can be enabled. This procedure allows
continued user code execution while dynamic reconfig-
uration of user billing code and tariff schedules occurs.
The initial application code loaded through JTAG dic-
tates the in-application facility and implements recogni-
tion of the in-application request and communication.
The following function declarations show examples of
some of the ROM utility functions provided for in-appli-
cation flash programming.
/* Write one 16-bit word to code address 'dest'.
* Dest must be aligned to 16 bits.
* Returns 0 = failure, 1 = OK.
*/
int flash_write (uint16_t dest, uint16_t data);
To erase, the following function would be used:
/* Erase the given Flash page
* addr: Flash offset (anywhere within page)
*/
int flash_erasepage(uint16_t addr);
Development and Technical
Support
A variety of highly versatile, affordably priced develop-
ment tools for this microcontroller are available from
Maxim and third-party suppliers, including:
• Compilers
• In-circuit emulators
• Integrated development environments (IDEs)
• JTAG-to-serial converters for programming and
debugging
A partial list of development tool vendors can be found
on our website at
www.maxim-ic.com/MAXQ_tools .
For technical support, go to www.maxim-ic.com/support .
Additional Documentation
Designers must have three documents to fully use all
the features of this device. This data sheet contains pin
descriptions, feature overviews, and electrical specifi-
cations. Errata sheets contain deviations from pub-
lished specifications. The
MAXQ Family User’s Guide
offers detailed information about device features and
operation.
• This MAXQ3108 data sheet, which contains electri-
cal/timing specifications and pin descriptions.
• The MAXQ3108 errata sheet for the specific device
revision, available at www.maxim-ic.com/errata .
• The MAXQ Family User's Guide , which contains
detailed information on core features and operation,
including programming. This document is available
on our website at
www.maxim-ic.com/MAXQUG .