ML620Q503/Q504 User's Manual
Chapter 27
Flash Memory Control
FEUL620Q504 27-
11
27.3.2 Data Flash Rewriting
The LSI is equipped with a data flash of 2 KB (2 sectors: 1 KB/sector). The rewrite count is 10,000.
Figure 27-1 shows the sequence of 1-word write/sector erase/block erase.
Writing is performed sequentially from the first sector. When writing to the second sector is saturated, the first sector is
erased, and the next data is written to it. Thus, up to 1024 * 10,000 times of rewrite is realized when data is written by
one word.
As the initial value after an erase is "FFFFH", the position matching the initial value is searched for as the write position.
Figure 27-1 Data Flash Rewrite Sequence
27.3.3 Program Memory Rewrite (ISP Function)
The program can be rewritten by software by using the ISP function. There are the following two ways to execute the
ISP program:
1) Execute the program by remapping the boot area of the ISP program by software
2) Execute the program by remapping the ISP boot area by hardware at LSI startup
These methods boot the ISP program and rewrite the program memory in the same sequence as the data flash rewrite.
These remap methods is as follows.
Set "1” to FSELF
Set "FA” and "F5” in this order to FLASHACP
Set address to FLASHSEG and FLASHA
Set data to FLASHD
Read/compare from CPU
Any other address
processing?
yes
no
Set "1” to FSERS
Set "1” to FERS
Set "0” to FSELF
(For 1-word write)
(For sector erase)
(For block erase)
(*)
*: The CPU stops during the write/erase processing. Perform the NOP processing twice after this processing.
Содержание LAPIS SEMICONDUCTOR ML620Q503
Страница 2: ...ML620Q503 Q504 User s Manual Issue Date Apr 16 2015 FEUL620Q504 01...
Страница 18: ...Chapter 1 Overview...
Страница 32: ...Chapter 2 CPU and Memory Space...
Страница 44: ...Chapter 3 Reset Function...
Страница 50: ...Chapter 4 Power Management...
Страница 70: ...Chapter 5 Interrupts...
Страница 134: ...Chapter 6 Clock Generation Circuit...
Страница 161: ...Chapter 7 Time Base Counter...
Страница 170: ...Chapter 8 Timers...
Страница 183: ...Chapter 9 Function Timer FTM...
Страница 231: ...Chapter 10 Watchdog Timer...
Страница 239: ...Chapter 11 Synchronous Serial Port SSIO...
Страница 251: ...Chapter 12 Synchronous Serial Port with FIFO SSIOF...
Страница 283: ...Chapter 13 UART...
Страница 303: ...Chapter 14 UART with FIFO UARTF...
Страница 327: ...Chapter 15 I2 C Bus Interface...
Страница 344: ...Chapter 16 Port XT...
Страница 350: ...Chapter 17 Port 0...
Страница 361: ...Chapter 18 Port 1...
Страница 368: ...Chapter 19 Port2...
Страница 379: ...Chapter 20 Port 3...
Страница 395: ...Chapter 21 Port 4...
Страница 410: ...Chapter 22 Port 5...
Страница 426: ...Chapter 23 Melody Driver...
Страница 439: ...Chapter 24 RC Oscillation type A D Converter RC ADC...
Страница 462: ...Chapter 25 Successive Approximation Type A D Converter SA ADC...
Страница 479: ...Chapter 26 Analog Comparator...
Страница 489: ...Chapter 27 Flash Memory Control...
Страница 505: ...Chapter 28 Voltage Level Supervisor VLS...
Страница 517: ...Chapter 29 LLD circuit...
Страница 519: ...Chapter 30 On Chip Debug Function...
Страница 522: ...Appendixes...
Страница 552: ...Revision History...