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参数资料
型号： PIC12F1840-E/P
厂商： Microchip Technology
文件页数： 9/122页
文件大小： 0K
描述： MCU 7KB FLASH 256B RAM XLP 8PDIP
产品培训模块： 8-bit PIC® Microcontroller Portfolio
标准包装： 60
系列： PIC® XLP™ 12F
核心处理器： PIC
芯体尺寸： 8-位
速度： 32MHz
连通性： I²C，LIN，SPI，UART/USART
外围设备： 欠压检测/复位，POR，PWM，WDT
输入/输出数： 5
程序存储器容量： 7KB（4K x 14）
程序存储器类型： 闪存
EEPROM 大小： 256 x 8
RAM 容量： 256 x 8
电压 - 电源 (Vcc/Vdd)： 2.3 V ~ 5.5 V
数据转换器： A/D 4x10b
振荡器型： 内部
工作温度： -40°C ~ 125°C
封装/外壳： 8-DIP（0.300"，7.62mm）
包装： 管件
PIC12(L)F1840
DS41441B-page 106
Preliminary
2011 Microchip Technology Inc.
11.4
Modifying Flash Program Memory
When modifying existing data in a program memory
row, and data within that row must be preserved, it must
first be read and saved in a RAM image. Program
memory is modified using the following steps:
1.
Load the starting address of the row to be mod-
ified.
2.
Read the existing data from the row into a RAM
image.
3.
Modify the RAM image to contain the new data
to be written into program memory.
4.
Load the starting address of the row to be rewrit-
ten.
5.
Erase the program memory row.
6.
Load the write latches with data from the RAM
image.
7.
Initiate a programming operation.
8.
Repeat steps 6 and 7 as many times as required
to reprogram the erased row.
11.5
User ID, Device ID and
Configuration Word Access
Instead of accessing program memory or EEPROM
data memory, the User ID’s, Device ID/Revision ID and
Configuration Words can be accessed when CFGS = 1
in the EECON1 register. This is the region that would
be pointed to by PC<15> = 1, but not all addresses are
accessible. Different access may exist for reads and
writes. Refer to Table 11-2.
When read access is initiated on an address outside the
parameters listed in Table 11-2, the EEDATH:EEDATL
register pair is cleared.
TABLE 11-2:
USER ID, DEVICE ID AND CONFIGURATION WORD ACCESS (CFGS = 1)
EXAMPLE 11-3:
CONFIGURATION WORD AND DEVICE ID ACCESS
Address
Function
Read Access
Write Access
8000h-8003h
User IDs
Yes
8006h
Device ID/Revision ID
Yes
No
8007h-8008h
Configuration Words 1 and 2
Yes
No
* This code block will read 1 word of program memory at the memory address:
*
PROG_ADDR_LO (must be 00h-08h) data will be returned in the variables;
*
PROG_DATA_HI, PROG_DATA_LO
BANKSEL
EEADRL
; Select correct Bank
MOVLW
PROG_ADDR_LO
;
MOVWF
EEADRL
; Store LSB of address
CLRF
EEADRH
; Clear MSB of address
BSF
EECON1,CFGS
; Select Configuration Space
BCF
INTCON,GIE
; Disable interrupts
BSF
EECON1,RD
; Initiate read
NOP
; Executed (See Figure 11-1)
NOP
; Ignored (See Figure 11-1)
BSF
INTCON,GIE
; Restore interrupts
MOVF
EEDATL,W
; Get LSB of word
MOVWF
PROG_DATA_LO
; Store in user location
MOVF
EEDATH,W
; Get MSB of word
MOVWF
PROG_DATA_HI
; Store in user location
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相关代理商/技术参数
参数描述
PIC12F1840-I/MF 功能描述:8位微控制器 -MCU 7KB Flash EEPROM 256b nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC12F1840-I/MF 制造商:Microchip Technology Inc 功能描述:; Controller Family/Series:PIC12F; Core
PIC12F1840-I/P 功能描述:8位微控制器 -MCU 7KB Flash EEPROM 256b nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
PIC12F1840-I/PC01 制造商:Microchip Technology Inc 功能描述:
PIC12F1840-I/SN 功能描述:8位微控制器 -MCU 7KB Flash EEPROM 256b nanoWatt RoHS:否 制造商:Silicon Labs 核心:8051 处理器系列:C8051F39x 数据总线宽度:8 bit 最大时钟频率:50 MHz 程序存储器大小:16 KB 数据 RAM 大小:1 KB 片上 ADC:Yes 工作电源电压:1.8 V to 3.6 V 工作温度范围:- 40 C to + 105 C 封装 / 箱体:QFN-20 安装风格:SMD/SMT
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