Flash Memory Version - Renesas M16C/62P Series Hardware Manual

M16C/62P Group (M16C/62P, M16C/62PT)

22. Flash Memory Version

Aside from the built-in flash memory, the flash memory version microcomputer has the same functions as the masked
ROM version.
In the flash memory version, the flash memory can perform in three rewrite modes: CPU rewrite mode, standard serial
I/O mode and parallel I/O mode.
Table 22.1 lists specifications of the flash memory version. See Table 1.1 to Table 1.3 Performance outline of
M16C/62PT group for the items not listed in Table 22.1.
Table 22.1 Flash Memory Version Specifications
Item
Flash Memory Rewrite Mode
Erase Block
Program Method
Erase Method
Program and Erase Control Method
Protect Method
Number of Commands
Program and Erase Endurance
Data Retention
ROM Code Protection
NOTES:
1. The boot ROM area contains a standard serial I/O mode rewrite control program which is stored in it
when shipped from the factory. This area can only be rewritten in parallel input/output mode.
2. Can be programmed in byte units in only parallel input/output mode.
3. Block 1 and block A are 10,000 times of programming and erasure. All other blocks are 1,000 times
of programming and erasure.
4. Definition of program and erase endurance
The programming and erasure times are defined to be per-block erasure times. For example,
assume a case where a 4-Kbyte block A is programmed in 2,048 operations by writing one word at
a time and erased thereafter.
In this case, the block is reckoned as having been programmed and erased once.
If a product is 100 times of programming and erasure, each block in it can be erased up to 100
times. When 10,000 times of programming and erasure, block 1 and block A can each be erased
up to 10,000 times. All other blocks can each be erased up to 1,000 times.
Rev.2.41 Jan 10, 2006
REJ09B0185-0241
http://www.xinpian.net
3 modes (CPU rewrite, standard serial I/O, parallel I/O)
User ROM Area See Figure 22.1 Flash Memory Block Diagram
Boot ROM Area 1 block (4 Kbytes)
In units of word, in units of byte
Collective erase, block erase
Program and erase controlled by software command
The lock bit protects each block
8 commands
100 times, 1,000 times/10,000 times (option)
10 years
Parallel I/O and standard serial I/O modes are supported
Page 270 of 390
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22. Flash Memory Version
Specification
(1)
(2)
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(3, 4)