LPC2917 datasheet(17/68 Pages) PHILIPS

17 / 68 page

LPC2917_19_1

Preliminary data sheet

Rev. 1.01 — 15 November 2007

17 of 68

NXP Semiconductors

LPC2917/19

ARM9 microcontroller with CAN and LIN

[1]

Availability of sector 15 to sector 18 depends on device type, see Section 4 “Ordering information”.

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.

8.1.6 Flash bridge wait-states

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:

0000 6000h

0000 8000h

0000 A000h

0000 C000h

0000 E000h

0001 0000h

0002 0000h

0003 0000h

0004 0000h

0005 0000h

0006 0000h

0007 0000h

15[1]

0008 0000h

16[1]

0009 0000h

17[1]

000A 0000h

18[1]

000B 0000h

Table 9.

Flash sector overview …continued

Sector number

Sector size (kB)

Sector base address

WST

acc clk

()

tclk sys

()

------------------

–

WST

acc addr

()

tclk sys

()

----------------------

–

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