參數(shù)資料
型號： PIC16F83
廠商： Microchip Technology Inc.
英文描述： 8-Bit CMOS Flash/EEPROM Microcontollrs(每個(gè)I/O口有20mA吸收,25mA驅(qū)動(dòng)，64字節(jié)數(shù)據(jù)EEPROM，2.0V的微控制器)
中文描述： 8位CMOS閃存/ EEPROM Microcontollrs（每個(gè)的I / O口有20mA的吸收，25mA電流驅(qū)動(dòng)，64字節(jié)數(shù)據(jù)的EEPROM，2.0伏的微控制器）
文件頁數(shù)： 35/120頁
文件大?。?/td> 764K
代理商： PIC16F83
1996 Microchip Technology Inc.
DS30430A-page 35
PIC16F8X
7.5
Write Verify
Depending on the application, good programming
practice may dictate that the value written to the Data
EEPROM should be verified (Example 7-3) to the
desired value to be written. This should be used in
applications where an EEPROM bit will be stressed
near the specification limit. The Total Endurance disk
will help determine your comfort level.
Generally the EEPROM write failure will be a bit which
was written as a '1', but reads back as a '0' (due to
leakage off the bit).
EXAMPLE 7-3:
WRITE VERIFY
BCF STATUS, RP0 ; Bank 0
: ; Any code can go here
: ;
MOVF EEDATA, W ; Must be in Bank 0
BSF STATUS, RP0 ; Bank 1
READ
BSF EECON1, RD ; YES, Read the
; value written
BCF STATUS, RP0 ; Bank 0
;
; Is the value written (in W reg) and
; read (in EEDATA) the same
;
SUBWF EEDATA, W ;
BTFSS STATUS, Z ; Is difference 0
GOTO WRITE_ERR ; NO, Write error
: ; YES, Good write
: ; Continue program
7.6
Protection Against Spurious Writes
There are conditions when the device may not want to
write to the data EEPROM memory. To protect against
spurious EEPROM writes, various mechanisms have
been built in. On power-up, WREN is cleared. Also, the
Power-up
Timer
(72
EEPROM write.
The write initiate sequence and the WREN bit together
help prevent an accidental write during brown-out,
power glitch, or software malfunction.
ms
duration)
prevents
7.7
Data EEPROM Operation during Code
Protect
When the device is code protected, the CPU is able to
read and write unscrambled data to the Data
EEPROM.
For ROM devices, there are two code protection bits
(Section 8.1). One for the ROM program memory and
one for the Data EEPROM memory.
TABLE 7-1:
REGISTERS/BITS ASSOCIATED WITH DATA EEPROM
Address
Name
Bit 7
Bit 6
Bit 5
Bit 4
Bit 3
Bit 2
Bit 1
Bit 0
Value on
Power-on
Reset
Value on all
other resets
08h
09h
88h
89h
EEDATA
EEADR
EECON1
EECON2
EEPROM data register
EEPROM address register
—
EEPROM control register 2
xxxx xxxx
uuuu uuuu
xxxx xxxx
uuuu uuuu
—
—
EEIF
WRERR
WREN
WR
RD
---0 x000
---0 q000
---- ----
---- ----
Legend:
x
used by Data EEPROM.
= unknown,
u
= unchanged,
-
= unimplemented read as '0',
q
= value depends upon condition. Shaded cells are not
相關(guān)PDF資料
PDF描述
PIC16F84 18-pin Flash/EEPROM 8-Bit Microcontrollers
PIC16F85 18/20 Pin, 8-Bit CMOS FLASH Microcontroller with Comparators and A/D Product Brief
PIC16F86 18/20 Pin, 8-Bit CMOS FLASH Microcontroller with Comparators and A/D Product Brief
PIC16F873A 28/40-pin Enhanced FLASH Microcontrollers
PIC16F874A 28/40-pin Enhanced FLASH Microcontrollers
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16F83-04/P 功能描述:8位微控制器 -MCU .875KB 36 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16F83-04/P 制造商:Microchip Technology Inc 功能描述:IC 8-BIT FLASH MCU
PIC16F83-04/SO 功能描述:8位微控制器 -MCU .875KB 36 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16F83-04I/P 功能描述:8位微控制器 -MCU .875KB 36 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
PIC16F83-04I/SO 功能描述:8位微控制器 -MCU .875KB 36 RAM 13 I/O RoHS:否 制造商:Silicon Labs 核心:8051 處理器系列:C8051F39x 數(shù)據(jù)總線寬度:8 bit 最大時(shí)鐘頻率:50 MHz 程序存儲(chǔ)器大小:16 KB 數(shù)據(jù) RAM 大小:1 KB 片上 ADC:Yes 工作電源電壓:1.8 V to 3.6 V 工作溫度范圍:- 40 C to + 105 C 封裝 / 箱體:QFN-20 安裝風(fēng)格:SMD/SMT
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