參數(shù)資料
型號： PIC18F458-I/P
廠商： Microchip Technology
文件頁數(shù)： 77/116頁
文件大?。?/td> 0K
描述： IC MCU FLASH 16KX16 CAN 40DIP
產(chǎn)品培訓模塊： Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標準包裝： 10
系列： PIC® 18F
核心處理器： PIC
芯體尺寸： 8-位
速度： 40MHz
連通性： CAN，I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復位，LVD，POR，PWM，WDT
輸入/輸出數(shù)： 33
程序存儲器容量： 32KB（16K x 16）
程序存儲器類型： 閃存
EEPROM 大小： 256 x 8
RAM 容量： 1.5K x 8
電壓 - 電源 (Vcc/Vdd)： 4.2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 8x10b
振蕩器型： 外部
工作溫度： -40°C ~ 85°C
封裝/外殼： 40-DIP（0.600"，15.24mm）
包裝： 管件
配用： 444-1001-ND - DEMO BOARD FOR PICMICRO MCU
其它名稱： PIC18F458I/P
2006 Microchip Technology Inc.
DS41159E-page 61
PIC18FXX8
5.3
Reading the Data EEPROM
Memory
To read a data memory location, the user must write the
address to the EEADR register, clear the EEPGD and
CFGS control bits (EECON1<7:6>) 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 written to by the user (during a
write operation).
EXAMPLE 5-1:
DATA EEPROM READ
5.4
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 5-2 must be followed to initiate the write cycle.
The write will not initiate if the above sequence is not
exactly followed (write 55h to EECON2, write 0AAh 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. The user may either
enable this interrupt or roll this bit. EEIF must be
cleared by software.
EXAMPLE 5-2:
DATA EEPROM WRITE
MOVLW
DATA_EE_ADDR
;
MOVWF
EEADR
;Data Memory Address
;to read
BCF
EECON1, EEPGD
;Point to DATA memory
BCS
EECON1, CFGS
;
BSF
EECON1, RD
;EEPROM Read
MOVF
EEDATA, W
;W = EEDATA
MOVLW
DATA_EE_ADDR
;
MOVWF
EEADR
; Data Memory Address to read
MOVLW
DATA_EE_DATA
;
MOVWF
EEDATA
; Data Memory Value to write
BCF
EECON1, EEPGD
; Point to DATA memory
BCF
EECON1, CFGS
; Access program FLASH or Data EEPROM memory
BSF
EECON1, WREN
; Enable writes
BCF
INTCON, GIE
; Disable interrupts
Required
MOVLW
55h
;
Sequence
MOVWF
EECON2
; Write 55h
MOVLW
0AAh
;
MOVWF
EECON2
; Write AAh
BSF
EECON1, WR
; Set WR bit to begin write
BSF
INTCON, GIE
; Enable interrupts
.
; user code execution
.
BCF
EECON1, WREN
; Disable writes on write complete (EEIF set)
相關(guān)PDF資料
PDF描述
PIC18F2585-I/SP IC MCU FLASH 24KX16 28-DIP
PIC32MX440F512H-80I/MR IC PIC MCU FLASH 512KX32 64-QFN
PIC32MX320F064H-80V/MR IC MCU 32BIT 64KB FLASH 64QFN
PIC32MX440F128L-80V/BG IC MCU 32BIT 128KB FLASH 121XBGA
PIC32MX664F064L-I/BG MCU PIC 64KB FLASH 121XBGA
相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC18F458T-I/L 功能描述:8位微控制器 -MCU 32KB 1536 RAM 34 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 安裝風格:SMD/SMT
PIC18F458T-I/PT 功能描述:8位微控制器 -MCU 32KB 1536 RAM 34 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 安裝風格:SMD/SMT
PIC18F458T-I/PTG 功能描述:8位微控制器 -MCU 32KB 1536 RAM 34 I/O Lead Free Package 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 安裝風格:SMD/SMT
PIC18F45J10-E/ML 功能描述:8位微控制器 -MCU 32 KB Flash 1 KB RAM 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 安裝風格:SMD/SMT
PIC18F45J10-E/P 功能描述:8位微控制器 -MCU 32 KB Flash 1 KB RAM 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 安裝風格:SMD/SMT
發(fā)布緊急采購，3分鐘左右您將得到回復。

采購需求

(若只采購一條型號，填寫一行即可)

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

發(fā)布成功！您可以繼續(xù)發(fā)布采購。也可以進入我的后臺，查看報價

*型號 *數(shù)量 廠商 批號 封裝
添加更多采購

我的聯(lián)系方式

*
*
*