參數(shù)資料
型號： PIC18F67J11-I/PT
廠商： Microchip Technology
文件頁數(shù)： 4/107頁
文件大?。?/td> 0K
描述： IC PIC MCU FLASH 64KX16 64TQFP
產(chǎn)品培訓(xùn)模塊： Asynchronous Stimulus
PIC18 J Series MCU Overview
8-bit PIC® Microcontroller Portfolio
標準包裝： 160
系列： PIC® 18F
核心處理器： PIC
芯體尺寸： 8-位
速度： 48MHz
連通性： I²C，SPI，UART/USART
外圍設(shè)備： 欠壓檢測/復(fù)位，LVD，POR，PWM，WDT
輸入/輸出數(shù)： 52
程序存儲器容量： 128KB（64K x 16）
程序存儲器類型： 閃存
RAM 容量： 3930 x 8
電壓 - 電源 (Vcc/Vdd)： 2 V ~ 3.6 V
數(shù)據(jù)轉(zhuǎn)換器： A/D 11x10b
振蕩器型： 內(nèi)部
工作溫度： -40°C ~ 85°C
封裝/外殼： 64-TQFP
包裝： 托盤
產(chǎn)品目錄頁面： 644 (CN2011-ZH PDF)
配用： AC162091-ND - HEADER MPLAB ICD2 18F87J11 64/80
MA180020-ND - MODULE PLUG-IN HPC EXPL 18F87J11
AC164327-ND - MODULE SKT FOR 64TQFP
2007-2012 Microchip Technology Inc.
DS39778E-page 101
PIC18F87J11 FAMILY
7.5
Writing to Flash Program Memory
The programming block is 32 words or 64 bytes.
Programming one word or two bytes at a time is also
supported.
Table writes are used internally to load the holding
registers needed to program the Flash memory. There
are 64 holding registers used by the table writes for
programming.
Since the Table Latch (TABLAT) is only a single byte, the
TBLWT
instruction may need to be executed 64 times for
each programming operation (if WPROG = 0). All of the
table write operations will essentially be short writes
because only the holding registers are written. At the
end of updating the 64 holding registers, the EECON1
register must be written to in order to start the
programming operation with a long write.
The long write is necessary for programming the inter-
nal Flash. Instruction execution is halted while in a long
write cycle. The long write will be terminated by the
internal programming timer.
The on-chip timer controls the write time. The
write/erase voltages are generated by an on-chip
charge pump, rated to operate over the voltage range
of the device.
FIGURE 7-5:
TABLE WRITES TO FLASH PROGRAM MEMORY
7.5.1
FLASH PROGRAM MEMORY WRITE
SEQUENCE
The sequence of events for programming an internal
program memory location should be:
1.
Read 1024 bytes into RAM.
2.
Update data values in RAM as necessary.
3.
Load Table Pointer register with address being
erased.
4.
Execute the row erase procedure.
5.
Load Table Pointer register with address of first
byte being written, minus 1.
6.
Write the 64 bytes into the holding registers with
auto-increment.
7.
Set the WREN bit (EECON1<2>) to enable byte
writes.
8.
Disable interrupts.
9.
Write H'55' to EECON2.
10. Write H'AA' to EECON2.
11. Set the WR bit. This will begin the write cycle.
12. The CPU will stall for duration of the write for TIW
(Parameter D133A).
13. Re-enable interrupts.
14. Repeat Steps 6 through 13 until all 1024 bytes
are written to program memory.
15. Verify the memory (table read).
An example of the required code is shown in
Example 7-3 on the following page.
Note 1:
Unlike previous PIC18 Flash devices,
members of the PIC18F87J11 family do
not reset the holding registers after a
write occurs. The holding registers must
be cleared or overwritten before a
programming sequence.
2:
To maintain the endurance of the pro-
gram memory cells, each Flash byte
should not be programmed more than
one time between erase operations.
Before attempting to modify the contents
of the target cell a second time, a row
erase of the target row or a bulk erase of
the entire memory, must be performed.
TBLPTR = xxxx3F
TBLPTR = xxxxx1
TBLPTR = xxxxx0
TBLPTR = xxxxx2
Program Memory
Holding Register
8
TABLAT
Write Register
Note:
Before setting the WR bit, the Table
Pointer address needs to be within the
intended address range of the 64 bytes in
the holding register.
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PIC18F67J11T-I/PT 功能描述:8位微控制器 -MCU 128KB Flash 3936 bytesRAM 51I/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
PIC18F67J50-I/PT 功能描述:8位微控制器 -MCU 128KB FLH 3936Bs RAM USB 2.0 nanoWatt 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
PIC18F67J50T-I/PT 功能描述:8位微控制器 -MCU 128KB FLH 3936Bs RAM USB 2.0 nanoWatt 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
PIC18F67J60-I/PT 功能描述:8位微控制器 -MCU 128KB FL 12KB RAM 10BASE-T 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
PIC18F67J60T-I/PT 功能描述:8位微控制器 -MCU 128KB FL 12KB RAM 10BASE-T 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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