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To put the device in Power-down mode and allow activity on one or more of these buses or
lines to power it back up, software should reprogram the pin function to External Interrupt,
select the appropriate mode and polarity for the interrupt, and then select Power-down
mode. Upon wake-up software should restore the pin multiplexing to the peripheral
function.
To summarize: on the LPC2101/02/03, the wake-up timer enforces a minimum reset
duration based on the crystal oscillator, and is activated whenever there is a wake-up from
Power-down mode or any type of Reset.
3.13 Code security vs. debugging
Applications in development typically need the debugging and tracing facilities in the
LPC2101/02/03. Later in the life cycle of an application, it may be more important to
protect the application code from observation by hostile or competitive eyes. The following
feature of the LPC2101/02/03 allows an application to control whether it can be debugged
or protected from observation.
Details on the way Code Read Protection works can be found in
Protection (CRP)" on page
User manual
235.
Rev. 01 — 12 January 2006
UM10161
Chapter 3: System control block
Section 19.7 "Code Read
© Koninklijke Philips Electronics N.V. 2006. All rights reserved.
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