 |
Electronic Components Datasheet Search |
|
|
Electronic Components Datasheet Search |
|
P89LPC970 Datasheet(PDF) 44 Page - NXP Semiconductors |
|
||||||||||||||||||||||||||||||
P89LPC970 Datasheet(HTML) 44 Page - NXP Semiconductors |
|
|
44 / 66 page  P89LPC97X_2 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2010. All rights reserved. Product data sheet Rev. 02 — 27 April 2010 44 of 66 NXP Semiconductors P89LPC970/971/972 8-bit microcontroller with accelerated two-clock 80C51 core Remark: Users who wish to use this loader should take precautions to avoid erasing the 1 kB sector that contains this bootloader. Instead, the page erase function can be used to erase the first eight 64-byte pages located in this sector. A custom bootloader can be written with the Boot Vector set to the custom bootloader, if desired. 7.29.10 Hardware activation of the bootloader The bootloader can also be executed by forcing the device into ISP mode during a power-on sequence (see the P89LPC970/971/972 User manual for specific information). This has the same effect as having a non-zero status byte. This allows an application to be built that will normally execute user code but can be manually forced into ISP operation. If the factory default setting for the boot is changed, it will no longer point to the factory pre-programmed ISP bootloader code. After programming the flash, the status byte should be programmed to zero in order to allow execution of the user’s application code beginning at address 0000H. 7.30 User configuration bytes Some user-configurable features of the P89LPC970/971/972 must be defined at power-up and therefore cannot be set by the program after start of execution. These features are configured through the use of the flash byte UCFG1 and UCFG2. Please see the P89LPC970/971/972 User Manual for additional details. 7.31 User sector security bytes There are four/eight User Sector Security Bytes on the P89LPC970/971/972. Each byte corresponds to one sector. Please see the P89LPC970/971/972 User manual for additional details. Table 9. Default boot vector values and ISP entry points Device Default boot vector Default bootloader entry point Default bootloader code range 1 kB sector range P89LPC970 07H 0700H 0600H to 07FFH 0400H to 07FFH P89LPC971 0FH 0F00H 0E00H to 1FFFH 0C00H to 0FFFH P89LPC972 1FH 1F00H 1E00H to 1FFFH 1C00H to 1FFFH |
Similar Part No. - P89LPC970 |
|
Similar Description - P89LPC970 |
|
|
Link URL |
| Privacy Policy |
| ALLDATASHEET.COM |
| Does ALLDATASHEET help your business so far? [ DONATE ] |
About Alldatasheet | Advertisement | Datasheet Upload | Contact us | Privacy Policy | Link Exchange | Manufacturer List All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
English ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
