參數(shù)資料
型號： PIC16LF818T-I/SS
元件分類： 微控制器/微處理器
英文描述： 8-BIT, FLASH, 10 MHz, RISC MICROCONTROLLER, PDSO20
封裝： 0.209 INCH, PLASTIC, MO-150, SSOP-20
文件頁數(shù)： 105/176頁
文件大?。?/td> 3124K
代理商： PIC16LF818T-I/SS
PIC16F818/819
DS39598E-page 32
2004 Microchip Technology Inc.
3.8
Protection Against Spurious Write
There are conditions when the device should not 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 ms
duration)
prevents
an
EEPROM write.
The write initiate sequence and the WREN bit together
help prevent an accidental write during brown-out,
power glitch or software malfunction.
3.9
Operation During Code-Protect
When the data EEPROM is code-protected, the micro-
controller can read and write to the EEPROM normally.
However, all external access to the EEPROM is
disabled. External write access to the program memory
is also disabled.
When program memory is code-protected, the micro-
controller can read and write to program memory
normally as well as execute instructions. Writes by the
device may be selectively inhibited to regions of
the memory
depending
on
the
setting
of
bits,
WRT1:WRT0,
of
the
Configuration
Word
(see
for
additional
information). External access to the memory is also
disabled.
TABLE 3-1:
REGISTERS/BITS ASSOCIATED WITH DATA EEPROM AND
FLASH PROGRAM MEMORIES
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
10Ch
EEDATA EEPROM/Flash Data Register Low Byte
xxxx xxxx
uuuu uuuu
10Dh
EEADR
EEPROM/Flash Address Register Low Byte
xxxx xxxx
uuuu uuuu
10Eh
EEDATH
—
EEPROM/Flash Data Register High Byte
--xx xxxx
--uu uuuu
10Fh
EEADRH
—
EEPROM/Flash Address
Register High Byte
---- -xxx
---- -uuu
18Ch
EECON1 EEPGD
—
FREE
WRERR
WREN
WR
RD
x--x x000
x--x q000
18Dh
EECON2 EEPROM Control Register 2 (not a physical register)
---- ----
0Dh
PIR2
—
EEIF
—
---0 ----
8Dh
PIE2
—
—EEIE
—
---0 ----
Legend:
x
= unknown, u = unchanged, - = unimplemented, read as ‘0’, q = value depends upon condition.
Shaded cells are not used by data EEPROM or Flash program memory.
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PIC16LF819-I/PTSL 功能描述:8位微控制器 -MCU 3.5 KB FL 256 RAM 16 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 最大時鐘頻率:50 MHz 程序存儲器大小: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
PIC16LF819-I/SO 功能描述:8位微控制器 -MCU 3.5KB 256 RAM 16 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 最大時鐘頻率:50 MHz 程序存儲器大小: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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