- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄368030 > PIC876 (Microchip Technology Inc.) 28/40-pin 8-Bit CMOS FLASH Microcontrollers PDF資料下載
參數(shù)資料
| 型號(hào)： | PIC876 |
| 廠商： | Microchip Technology Inc. |
| 英文描述： | 28/40-pin 8-Bit CMOS FLASH Microcontrollers |
| 中文描述： | 28/40-pin 8位CMOS閃存微控制器 |
| 文件頁(yè)數(shù)： | 43/200頁(yè) |
| 文件大小： | 3544K |
| 代理商： | PIC876 |
第1頁(yè)第2頁(yè)第3頁(yè)第4頁(yè)第5頁(yè)第6頁(yè)第7頁(yè)第8頁(yè)第9頁(yè)第10頁(yè)第11頁(yè)第12頁(yè)第13頁(yè)第14頁(yè)第15頁(yè)第16頁(yè)第17頁(yè)第18頁(yè)第19頁(yè)第20頁(yè)第21頁(yè)第22頁(yè)第23頁(yè)第24頁(yè)第25頁(yè)第26頁(yè)第27頁(yè)第28頁(yè)第29頁(yè)第30頁(yè)第31頁(yè)第32頁(yè)第33頁(yè)第34頁(yè)第35頁(yè)第36頁(yè)第37頁(yè)第38頁(yè)第39頁(yè)第40頁(yè)第41頁(yè)第42頁(yè)當(dāng)前第43頁(yè)第44頁(yè)第45頁(yè)第46頁(yè)第47頁(yè)第48頁(yè)第49頁(yè)第50頁(yè)第51頁(yè)第52頁(yè)第53頁(yè)第54頁(yè)第55頁(yè)第56頁(yè)第57頁(yè)第58頁(yè)第59頁(yè)第60頁(yè)第61頁(yè)第62頁(yè)第63頁(yè)第64頁(yè)第65頁(yè)第66頁(yè)第67頁(yè)第68頁(yè)第69頁(yè)第70頁(yè)第71頁(yè)第72頁(yè)第73頁(yè)第74頁(yè)第75頁(yè)第76頁(yè)第77頁(yè)第78頁(yè)第79頁(yè)第80頁(yè)第81頁(yè)第82頁(yè)第83頁(yè)第84頁(yè)第85頁(yè)第86頁(yè)第87頁(yè)第88頁(yè)第89頁(yè)第90頁(yè)第91頁(yè)第92頁(yè)第93頁(yè)第94頁(yè)第95頁(yè)第96頁(yè)第97頁(yè)第98頁(yè)第99頁(yè)第100頁(yè)第101頁(yè)第102頁(yè)第103頁(yè)第104頁(yè)第105頁(yè)第106頁(yè)第107頁(yè)第108頁(yè)第109頁(yè)第110頁(yè)第111頁(yè)第112頁(yè)第113頁(yè)第114頁(yè)第115頁(yè)第116頁(yè)第117頁(yè)第118頁(yè)第119頁(yè)第120頁(yè)第121頁(yè)第122頁(yè)第123頁(yè)第124頁(yè)第125頁(yè)第126頁(yè)第127頁(yè)第128頁(yè)第129頁(yè)第130頁(yè)第131頁(yè)第132頁(yè)第133頁(yè)第134頁(yè)第135頁(yè)第136頁(yè)第137頁(yè)第138頁(yè)第139頁(yè)第140頁(yè)第141頁(yè)第142頁(yè)第143頁(yè)第144頁(yè)第145頁(yè)第146頁(yè)第147頁(yè)第148頁(yè)第149頁(yè)第150頁(yè)第151頁(yè)第152頁(yè)第153頁(yè)第154頁(yè)第155頁(yè)第156頁(yè)第157頁(yè)第158頁(yè)第159頁(yè)第160頁(yè)第161頁(yè)第162頁(yè)第163頁(yè)第164頁(yè)第165頁(yè)第166頁(yè)第167頁(yè)第168頁(yè)第169頁(yè)第170頁(yè)第171頁(yè)第172頁(yè)第173頁(yè)第174頁(yè)第175頁(yè)第176頁(yè)第177頁(yè)第178頁(yè)第179頁(yè)第180頁(yè)第181頁(yè)第182頁(yè)第183頁(yè)第184頁(yè)第185頁(yè)第186頁(yè)第187頁(yè)第188頁(yè)第189頁(yè)第190頁(yè)第191頁(yè)第192頁(yè)第193頁(yè)第194頁(yè)第195頁(yè)第196頁(yè)第197頁(yè)第198頁(yè)第199頁(yè)第200頁(yè)
1999 Microchip Technology Inc.
DS30292B-page 43
PIC16F87X
4.3
Reading the Data EEPROM Memory
To read a data memory location, the user must write the
address to the EEADR register, clear the EEPGD con-
trol bit (EECON1<7>) and then set control bit RD
(EECON1<0>). The data is available in the very next
instruction cycle of the EEDATA register, therefore it
can be read by the next instruction. EEDATA will hold
this value until another read operation or until it is writ-
ten to by the user (during a write operation).
EXAMPLE 4-1:
BSF
STATUS, RP1
BCF
STATUS, RP0
MOVLW DATA_EE_ADDR ;
MOVWF EEADR
BSF
STATUS, RP0
BCF
EECON1, EEPGD ;Point to DATA memory
BSF
EECON1, RD
;EEPROM Read
BCF
STATUS, RP0
;Bank 2
MOVF
EEDATA, W
;W = EEDATA
DATA EEPROM READ
;
;Bank 2
;Data Memory Address to read
;Bank 3
4.4
Writing to the Data EEPROM Memory
To write an EEPROM data location, the address must
first be written to the EEADR register and the data writ-
ten to the EEDATA register. Then the sequence in
Example 4-2 must be followed to initiate the write cycle.
EXAMPLE 4-2:
DATA EEPROM WRITE
BSF STATUS, RP1 ;
The write will not initiate if the above sequence is not
exactly followed (write 55h to EECON2, write AAh to
EECON2, then set WR bit) for each byte. It is strongly
recommended that interrupts be disabled during this
code segment.
Additionally, the WREN bit in EECON1 must be set to
enable writes. This mechanism prevents accidental
writes to data EEPROM due to unexpected code exe-
cution (i.e., runaway programs). The WREN bit should
be kept clear at all times, except when updating the
EEPROM. The WREN bit is not cleared by hardware
After a write sequence has been initiated, clearing the
WREN bit will not affect the current write cycle. The WR
bit will be inhibited from being set unless the WREN bit
is set. The WREN bit must be set on a previous instruc-
tion. Both WR and WREN cannot be set with the same
instruction.
At the completion of the write cycle, the WR bit is
cleared in hardware and the EEPROM Write Complete
Interrupt Flag bit (EEIF) is set. EEIF must be cleared by
software.
BCF STATUS, RP0 ; Bank 2
MOVLW DATA_EE_ADDR ;
MOVWF EEADR ; Data Memory Address to write
MOVLW DATA_EE_DATA ;
MOVWF EEDATA ; Data Memory Value to write
BSF STATUS, RP0 ; Bank 3
BCF EECON1, EEPGD ; Point to DATA memory
BSF EECON1, WREN ; Enable writes
BCF INTCON, GIE ; Disable Interrupts
MOVLW 55h ;
Required MOVWF EECON2 ; Write 55h
Sequence MOVLW AAh ;
MOVWF EECON2 ; Write AAh
BSF EECON1, WR ; Set WR bit to begin write
BSF INTCON, GIE ; Enable Interrupts
SLEEP ; Wait for interrupt to signal write complete
BCF EECON1, WREN ; Disable writes
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| PIP201-12M-3 | DC-to-DC converter powertrain |
| PIP3102-R | LOGIC LEVEL TOPFET |
| PIP3203-A | TOPFET high side switch |
| PIP3206-R | TOPFET high side switch SMD version |
| PIP8.4 | 7,500 & 15,000 Watt TVS Module |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| PIC9310 | 制造商:PICSEMI 制造商全稱:PICSEMI 功能描述:Async Boost with 600KHz switching |
| PICADILLO-35T | 功能描述:Resistive Graphic LCD Display Module Transmissive Red, Green, Blue (RGB) TFT - Color I2C, SPI 3.5" (88.90mm) 320 x 480 制造商:4d systems pty ltd 系列:- 零件狀態(tài):有效 顯示類型:TFT - 彩色 顯示模式:可傳導(dǎo)的 觸摸屏:電阻 屏幕對(duì)角線尺寸:3.5"（88.90mm） 可視范圍:73.40mm 寬 x 49.00mm 高 背光:LED - 白 點(diǎn)像素:320 x 480 接口:I2C，SPI 圖形顏色:紅，綠，藍(lán)（RGB） 背景顏色:- 點(diǎn)尺寸:- 點(diǎn)間距:0.15mm 寬 x 0.15mm 高 標(biāo)準(zhǔn)包裝:1 |
| PICADLL | 制造商:CALIBRE UK 功能描述:DEVELOPMENT DLLS I2C ADAPTER |
| PICAMBOX | 制造商:Nwazet 功能描述:PI CAMERA BOX |
| PICAMBOXBUNDLE | 制造商:Nwazet 功能描述:PI CAMERA BOX BUNDLE WITH FISHEYE LENS |
發(fā)布緊急采購(gòu)，3分鐘左右您將得到回復(fù)。