lpc2917 NXP Semiconductors, lpc2917 Datasheet - Page 17

• Manufacturer Part Number: lpc2917
• Description: Arm9 Microcontroller With Can And Lin
• Manufacturer: NXP Semiconductors

NXP Semiconductors
LPC2917_19_1
Preliminary data sheet
8.1.6 Flash bridge wait-states
Table 9.
[1]
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:
Sector number
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
[1]
[1]
[1]
[1]
Availability of sector 15 to sector 18 depends on device type, see
Flash sector overview
Rev. 1.01 — 15 November 2007
Sector size (kB)
8
8
8
8
8
64
64
64
64
64
64
64
64
64
64
64
…continued
WST
WST
!
!
t
--------------------- -
t
t
----------------- -
acc addr
t
tclk sys
acc clk
t
tclk sys
Sector base address
0000 6000h
0000 8000h
0000 A000h
0000 C000h
0000 E000h
0001 0000h
0002 0000h
0003 0000h
0004 0000h
0005 0000h
0006 0000h
0007 0000h
0008 0000h
0009 0000h
000A 0000h
000B 0000h
ARM9 microcontroller with CAN and LIN
–
–
1
1
Section 4 “Ordering
LPC2917/19
© NXP B.V. 2007. All rights reserved.
information”.
17 of 68