 |
поискавой системы для электроныых деталей |
|
|
поискавой системы для электроныых деталей |
|
PIC24F04KA201 датащи(PDF) 9 Page - Microchip Technology |
|
|
|||||||||||||||||||||||||||||
PIC24F04KA201 датащи(HTML) 9 Page - Microchip Technology |
|
|
9 / 48 page  PIC24FXXKAXXX © 2008 Microchip Technology Inc. Advance Information DS39919A-page 9 3.4 Flash Memory Programming in ICSP Mode 3.4.1 PROGRAMMING OPERATIONS The NVMCON register controls the Flash memory write and erase operations. To program the device, set the NVMCON register to select the type of erase operation (see Table 3-2) or write operation (see Table 3-3). Set the WR control bit (NVMCON<15>) to initiate the program. In ICSP mode, all programming operations are self-timed. There is an internal delay between setting and automatic clearing of the WR control bit when the programming operation is complete. Refer to Section 7.0 “AC/DC Characteristics and Timing Requirements” for information on the delays associated with various programming operations. TABLE 3-3: NVMCON VALUES FOR WRITE OPERATIONS 3.4.2 STARTING AND STOPPING A PROGRAMMING CYCLE The WR bit (NVMCON<15>) is used to start an erase or write cycle. Initiate the programming cycle by setting the WR bit. All erase and write cycles are self-timed. The WR bit should be polled to determine if the erase or write cycle is completed. Start a programming cycle as follows: BSET NVMCON, #WR 3.5 Erasing Program Memory To erase the program memory (all of code memory, data memory and Configuration bits, including the code-protect bits), set the NVMCON to 4064h and then execute the programming cycle. Figure 3-6 illustrates the ICSP programming process for Bulk Erase. This process includes the ICSP command code, which must be transmitted (for each instruction), LSB first, using the PGCx and PGDx pins (see Figure 3-2). Table 3-4 provides the steps for executing serial instruction for the Bulk Erase mode. FIGURE 3-6: BULK ERASE FLOW TABLE 3-2: NVMCON VALUES FOR ERASE OPERATIONS NVMCON Value Erase Operation 4064h Erase the code memory and Configuration registers (does not erase programming executive code and Device ID registers). 404Ch Erase the general segment and Configuration bits associated with it. 4068h Erase the boot segment and Configuration bits associated with it. 405Ah(1) Erase four rows of code memory. 4059h(1) Erase two rows of code memory. 4058h(1) Erase a row of code memory. 4050h Erase the entire data EEPROM memory and Configuration bits associated with it. 405Ah(1) Erase eight words of data EEPROM memory. 4059h(1) Erase four words of data EEPROM memory. 4058h(1) Erase one word of data EEPROM memory. 4054h Erase all the Configuration registers (except the code-protect fuses). 4058h(1) Erase Configuration registers except FBS and FGS. Note 1: The destination address decides the region (code memory, data EEPROM memory or Configuration register) of the erased rows/words. NVMCON Value Write Operation 4004h(1) Write one Configuration register. 4004h(1) Program one row (32 instruction words) of code memory or executive memory. 4004h(1) Program one word of data EEPROM memory. Note 1: The destination address decides the region (code memory, data EEPROM memory or Configuration register) of the erased rows/words. Note: Program memory must be erased before writing any data to program memory. End Set the WR bit to Initiate Erase Write 4064h to NVMCON SFR Delay P11 + P10 Time Start |
|
ссылки URL |
| Вашему бизинису помогли Аллдатащит? [ DONATE ] |
Что такое Аллдатащит | реклама | контакт | Конфиденциальность | Ссылка на техническое описание | обмен ссыками | поиск по производителю All Rights Reserved©Alldatasheet.com |
| Russian : Alldatasheetru.com | Korean : Alldatasheet.co.kr | Spanish : Alldatasheet.es | French : Alldatasheet.fr | Italian : Alldatasheetit.com Portuguese : Alldatasheetpt.com | Polish : Alldatasheet.pl | Vietnamese : Alldatasheet.vn Indian : Alldatasheet.in | Mexican : Alldatasheet.com.mx | British : Alldatasheet.co.uk | New Zealand : Alldatasheet.co.nz |
|
Family Site : ic2ic.com |
icmetro.com |
Russian ▼
English
Chinese
German
Japanese
Russian
Korean
Spanish
French
Italian
Portuguese
Polish
Vietnamese
Indian
Mexican
British
New Zealand
