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參數(shù)資料
| 型號： | P89LPC9161FDH,129 |
| 廠商： | NXP Semiconductors |
| 文件頁數(shù)： | 19/27頁 |
| 文件大小： | 0K |
| 描述： | IC 80C51 MCU FLASH 2KB 16TSSOP |
| 標(biāo)準(zhǔn)包裝： | 96 |
| 系列： | LPC900 |
| 核心處理器： | 8051 |
| 芯體尺寸： | 8-位 |
| 速度： | 18MHz |
| 連通性： | I²C，SPI，UART/USART |
| 外圍設(shè)備： | 欠壓檢測/復(fù)位，POR，PWM，WDT |
| 輸入/輸出數(shù)： | 14 |
| 程序存儲器容量： | 2KB（2K x 8） |
| 程序存儲器類型： | 閃存 |
| RAM 容量： | 256 x 8 |
| 電壓 - 電源 (Vcc/Vdd)： | 2.4 V ~ 3.6 V |
| 數(shù)據(jù)轉(zhuǎn)換器： | A/D 4x8b; D/A 1x8b |
| 振蕩器型： | 內(nèi)部 |
| 工作溫度： | -40°C ~ 85°C |
| 封裝/外殼： | 16-TSSOP（0.173"，4.40mm 寬） |
| 包裝： | 管件 |
| 其它名稱： | 935290261129 |
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2010 Microchip Technology Inc.
Preliminary
DS39979A-page 83
PIC18F87J72 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 1,024 bytes into RAM.
2.
Update data values in RAM as necessary.
3.
Load Table Pointer register with the address
being erased.
4.
Execute the erase procedure.
5.
Load Table Pointer register with the address of
the 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 55h to EECON2.
10. Write 0AAh to EECON2.
11. Set the WR bit. This will begin the write cycle.
12. The CPU will stall for the duration of the write for
13. Re-enable interrupts.
14. Repeat steps 6 through 13 until all 1,024 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 PIC18F87J72 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 program
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, an erase of the
target, 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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| P89LPC916FDH | 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 2K FLASH TSSOP16 制造商:NXP Semiconductors 功能描述:MCU 8BIT 80C51 2K FLASH, TSSOP16 |
| P89LPC916FDH,118 | 功能描述:8位微控制器 -MCU 2K FL/256B 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 |
| P89LPC916FDH,129 | 功能描述:8位微控制器 -MCU ORDER P89LPC916FDH-T T/R 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 |
| P89LPC916FDH118 | 制造商:NXP Semiconductors 功能描述:IC 8BIT MCU 80C51 18MHZ TSSOP-16 |
| P89LPC916FDH-S | 功能描述:8位微控制器 -MCU 80C51 2K FL 256B 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(fēng)格:SMD/SMT |
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