Datasheet 搜索 > 微控制器 > Microchip（微芯） > PIC18F25K20-I/SP 数据手册 > PIC18F25K20-I/SP 开发手册 5/18 页
器件3D模型￥ 27.002
PIC18F25K20-I/SP 开发手册 - Microchip（微芯）
制造商:
Microchip（微芯）
分类:
微控制器
封装:
DIP-28
描述:
PIC18 微控制器
Pictures:
3D模型
符号图
焊盘图
引脚图
产品图
页面导航:
应用领域在P1P5P15
导航目录
PIC18F25K20-I/SP数据手册
Page:
of 18 Go
若手册格式错乱，请下载阅览PDF原文件
© 2011 Microchip Technology Inc. DS01095D-page 5
AN1095
Page Status
Each program memory page reserves space for the
page status – using the first two-word locations for the
PIC18 implementation or the first location for PIC24/
dsPIC33F/dsPIC33E. The status contains information
about the page, whether it is expired or active, and the
number of erase/write cycles performed.
These values are used by the algorithm to monitor and
control page information, and are not directly
accessible by the user. For formats of PIC24/
dsPIC33F/dsPIC33E and PIC18 page status
information, refer to Register 1, Register 2 and
Register 3.
Note: Applications with bootloaders should not
modify any of the pages that are used for
Data EEPROM Emulation.
REGISTER 1: PAGE STATUS FOR PIC24/dsPIC33F/dsPIC33E ALGORITHM
U-1 U-1 U-1 R-1 R-1 R-1 U-1 U-1
— — — Page Expired Page Current Page Available — —
bit 23 bit 16
R-1 R-1 R-1 R-1 R-1 R-1 R-1 R-1
Page Erase/Write Count
bit 15 bit 8
R-1 R-1 R-1 R-1 R-1 R-1 R-1 R-1
Page Erase/Write Count
bit 7 bit 0
Legend:
R = Reserved bit U = Unused bit, read as ‘1’
-n = Value prior to initialization 1 = Bit is in erased state 0 = Bit is in programmed state
bit 23-21 Unimplemented: Read as ‘1’
bit 20 Page Expired
1 = Page not expired
0 = Page expired
bit 19 Page Current
1 = Page not current
0 = Page current
bit 18 Page Available
1 = Page available
0 = Page not available
bit 17-16 Unimplemented: Read as ‘1’
bit 15-0 Page Erase/Write Count: Number of Page Erase/Write Cycles
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