Nxp Semiconductors LPC2919 User Manual

LPC2917_19_1

© NXP B.V. 2007. All rights reserved.

[1]

Availability of sector 15 to sector 18 depends on device type, see 

.

The index sector is a special sector in which the JTAG access protection and sector 
security are located. The address space becomes visible by setting the FS_ISS bit and 
overlaps the regular flash sector’s address space.

Note that the index sector cannot be erased, and that access to it has to be performed via 
code outside the flash.

To eliminate the delay associated with synchronizing flash-read data, a predefined 
number of wait-states must be programmed. These depend on flash-memory response 
time and system clock period. The minimum wait-states value can be calculated with the 
following formulas:

Synchronous reading:

Asynchronous reading:

3

8

0000 6000h

4

8

0000 8000h

5

8

0000 A000h

6

8

0000 C000h

7

8

0000 E000h

8

64

0001 0000h

9

64

0002 0000h

10

64

0003 0000h

11

64

0004 0000h

12

64

0005 0000h

13

64

0006 0000h

14

64

0007 0000h

64

0008 0000h

64

0009 0000h

64

000A 0000h

64

000B 0000h

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