參數(shù)資料
型號: PIC16F688-I/ML
廠商: Microchip Technology
文件頁數(shù): 182/204頁
文件大?。?/td> 0K
描述: IC PIC MCU FLASH 4KX14 16QFN
產(chǎn)品培訓(xùn)模塊: Asynchronous Stimulus
8-bit PIC® Microcontroller Portfolio
標(biāo)準(zhǔn)包裝: 91
系列: PIC® 16F
核心處理器: PIC
芯體尺寸: 8-位
速度: 20MHz
連通性: UART/USART
外圍設(shè)備: 欠壓檢測/復(fù)位,POR,WDT
輸入/輸出數(shù): 12
程序存儲器容量: 7KB(4K x 14)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 256 x 8
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 2 V ~ 5.5 V
數(shù)據(jù)轉(zhuǎn)換器: A/D 8x10b
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 16-VQFN 裸露焊盤
包裝: 管件
產(chǎn)品目錄頁面: 639 (CN2011-ZH PDF)
配用: AC164324-ND - MODULE SKT FOR MPLAB 8DFN/16QFN
XLT16QFN1-ND - SOCKET TRANSITION 14DIP TO 16QFN
AC162061-ND - HEADER INTRFC MPLAB ICD2 20PIN
AC162056-ND - HEADER INTERFACE ICD2 16F688
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2009 Microchip Technology Inc.
DS41203E-page 77
PIC16F688
9.0
DATA EEPROM AND FLASH
PROGRAM MEMORY
CONTROL
Data EEPROM memory is readable and writable and
the Flash program memory is readable during normal
operation (full VDD range). These memories are not
directly mapped in the register file space. Instead, they
are indirectly addressed through the Special Function
Registers. There are six SFRs used to access these
memories:
EECON1
EECON2
EEDAT
EEDATH
EEADR
EEADRH
When interfacing the data memory block, EEDAT holds
the 8-bit data for read/write, and EEADR holds the
address of the EE data location being accessed. This
device has 256 bytes of data EEPROM with an address
range from 0h to 0FFh.
When interfacing the program memory block, the
EEDAT and EEDATH registers form a 2-byte word that
holds the 14-bit data for read/write, and the EEADR
and EEADRH registers form a 2-byte word that holds
the 12-bit address of the EEPROM location being
accessed. This device has 4K words of program
EEPROM with an address range from 0h to 0FFFh.
The program memory allows one word reads.
The EEPROM data memory allows byte read and write.
A byte write automatically erases the location and
writes the new data (erase before write).
The write time is controlled by an on-chip timer. The
write/erase voltages are generated by an on-chip
charge pump rated to operate over the voltage range of
the device for byte or word operations.
When the device is code-protected, the CPU may
continue to read and write the data EEPROM memory
and read the program memory. When code-protected,
the device programmer can no longer access data or
program memory.
9.1
EEADR and EEADRH Registers
The EEADR and EEADRH registers can address up to
a maximum of 256 bytes of data EEPROM or up to a
maximum of 4K words of program EEPROM.
When selecting a program address value, the MSB of
the address is written to the EEADRH register and the
LSB is written to the EEADR register. When selecting a
data address value, only the LSB of the address is
written to the EEADR register.
9.1.1
EECON1 AND EECON2 REGISTERS
EECON1 is the control register for EE memory
accesses.
Control bit EEPGD determines if the access will be a
program or data memory access. When clear, as it is
when reset, any subsequent operations will operate on
the
data
memory.
When
set,
any
subsequent
operations will operate on the program memory.
Program memory can only be read.
Control bits RD and WR initiate read and write,
respectively. These bits cannot be cleared, only set, in
software. They are cleared in hardware at completion
of the read or write operation. The inability to clear the
WR bit in software prevents the accidental, premature
termination of a write operation.
The WREN bit, when set, will allow a write operation to
data EEPROM. On power-up, the WREN bit is clear.
The WRERR bit is set when a write operation is inter-
rupted by a MCLR or a WDT Time-out Reset during
normal operation. In these situations, following Reset,
the user can check the WRERR bit and rewrite the
location. The data and address will be unchanged in
the EEDAT and EEADR registers.
Interrupt flag bit EEIF of the PIR1 register is set when
write is complete. It must be cleared in the software.
EECON2 is not a physical register. Reading EECON2
will read all ‘0’s. The EECON2 register is used
exclusively in the data EEPROM write sequence.
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相關(guān)代理商/技術(shù)參數(shù)
參數(shù)描述
PIC16F688ISL 制造商:Microchip Technology Inc 功能描述:
PIC16F688IST 制造商:MICROCHIP 功能描述:New
PIC16F688T-E/SL 功能描述:8位微控制器 -MCU 7KB 256 RAM 12 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
PIC16F688T-E/ST 功能描述:8位微控制器 -MCU 7KB 256 RAM 12 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
PIC16F688T-E/ST VAO 制造商:Microchip Technology Inc 功能描述: