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Philips Semiconductors
Volume 1
21.4.14 Boot process flowchart
21.5 Sector numbers
Some IAP and ISP commands operate on "sectors" and specify sector numbers. The
following table indicate the correspondence between sector numbers and memory
addresses for LPC2141/2/4/6/8 devices containing 32, 64, 128, 256 and 512K bytes of
Flash respectively. IAP, ISP, and RealMonitor routines are located in the boot block. The
User manual
RESET
INITIALIZE
CRP *
ENABLED?
Yes
WATCHDOG
FLAG SET?
No
ENTER ISP
MODE?
(PO.14 LOW?)
Yes
* Code read protection
Fig 66. Boot process flowchart
Rev. 01 — 15 August 2005
No
ENABLE DEBUG
Yes
USER CODE
No
VALID?
RUN AUTO-BAUD
No
AUTO-BAUD
SUCCESSFUL?
RECEIVE CRYSTAL
FREQUENCY
RUN ISP COMMAND
HANDLER
UM10139
Chapter 21: Flash Memory
Yes
No
EXECUTE INTERNAL
USER CODE
Yes
© Koninklijke Philips Electronics N.V. 2005. All rights reserved.
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