參數(shù)資料
型號： AT89C51CC01UA-RLTUM
廠商： Atmel
文件頁數(shù)： 119/123頁
文件大?。?/td> 0K
描述： IC 8051 MCU FLASH 32K 44-VQFP
產(chǎn)品培訓(xùn)模塊： MCU Product Line Introduction
標準包裝： 800
系列： AT89C CAN
核心處理器： 8051
芯體尺寸： 8-位
速度： 40MHz
連通性： CAN，UART/USART
外圍設(shè)備： POR，PWM，WDT
輸入/輸出數(shù)： 34
程序存儲器容量： 32KB（32K x 8）
程序存儲器類型： 閃存
EEPROM 大小： 2K x 8
RAM 容量： 1.25K x 8
電壓 - 電源 (Vcc/Vdd)： 3 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： 44-LQFP
包裝： 托盤
產(chǎn)品目錄頁面： 616 (CN2011-ZH PDF)
配用： AT89OCD-01-ND - USB EMULATOR FOR AT8XC51 MCU
其它名稱： AT89C51CC01UARLTUM
2010 Microchip Technology Inc.
DS41303G-page 95
PIC18F2XK20/4XK20
6.5
Writing to Flash Program Memory
The programming block size is 16, 32 or 64 bytes,
depending on the device (See Table 6-1). Word or byte
programming is not supported.
Table writes are used internally to load the holding
registers needed to program the Flash memory. There
are only as many holding registers as there are bytes
in a write block (See Table 6-1).
Since the Table Latch (TABLAT) is only a single byte,
the TBLWT instruction may need to be executed 16, 32
or 64 times, depending on the device, for each pro-
gramming operation. All of the table write operations
will essentially be short writes because only the holding
registers are written. After all the holding registers have
been written, the programming operation of that block
of memory is started by configuring the EECON1 reg-
ister for a program memory write and performing the
long write sequence.
The long write is necessary for programming the inter-
nal Flash. Instruction execution is halted during a long
write cycle. The long write will be terminated by the
internal programming timer.
The EEPROM 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 6-5:
TABLE WRITES TO FLASH PROGRAM MEMORY
6.5.1
FLASH PROGRAM MEMORY WRITE
SEQUENCE
The sequence of events for programming an internal
program memory location should be:
1.
Read 64 bytes into RAM.
2.
Update data values in RAM as necessary.
3.
Load Table Pointer register with address being
erased.
4.
Execute the block erase procedure.
5.
Load Table Pointer register with address of first
byte being written.
6.
Write the 16, 32 or 64 byte block into the holding
registers with auto-increment.
7.
Set the EECON1 register for the write operation:
set EEPGD bit to point to program memory;
clear the CFGS bit to access program memory;
set WREN 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 duration of the write (about
2 ms using internal timer).
13. Re-enable interrupts.
14. Repeat steps 6 to 13 for each block until all 64
bytes are written.
15. Verify the memory (table read).
This procedure will require about 6 ms to update each
write block of memory. An example of the required code
is given in Example 6-3.
Note:
The default value of the holding registers on
device Resets and after write operations is
FFh. A write of FFh to a holding register
does not modify that byte. This means that
individual bytes of program memory may be
modified, provided that the change does not
attempt to change any bit from a ‘0’ to a ‘1’.
When modifying individual bytes, it is not
necessary to load all holding registers
before executing a long write operation.
TABLAT
TBLPTR = xxxxYY
(1)
TBLPTR = xxxx01
TBLPTR = xxxx00
Write Register
TBLPTR = xxxx02
Program Memory
Holding Register
8
Note 1: YY = x7, xF, or 1F for 8, 16 or 32 byte write blocks, respectively.
Note:
Before setting the WR bit, the Table
Pointer address needs to be within the
intended address range of the bytes in the
holding registers.
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參數(shù)描述
AT89C51CC01UA-SLSUM 功能描述:8位微控制器 -MCU CAN-STICK Bootloader UART IND 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
AT89C51CC01UU-RLTUM 功能描述:8位微控制器 -MCU Microcontroller 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
AT89C51CC01UU-SLSUM 功能描述:8位微控制器 -MCU Microcontroller 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
AT89C51CC02 制造商:ATMEL 制造商全稱:ATMEL Corporation 功能描述:Enhanced 8-bit Microcontroller with CAN Controller and Flash
AT89C51CC02CA-RATUM 功能描述:8位微控制器 -MCU CAN/C51 Boot CAN 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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