M16C6S_09 Datasheet, PDF (160/208 Pages) Renesas Technology Corp – SINGLE-CHIP 16-BIT CMOS MICROCOMPUTER

M16C/6S Group
Flash Memory Version
Flash Memory Version
Flash Memory Performance
The flash memory version has three modes—CPU rewrite, standard serial input/output, and parallel input/
output modes—in which its internal flash memory can be operated on.
Note: About the parallel programmer of exclusive use, there is no schedule of development at the present time.
Table 1.20.1 shows the outline performance of flash memory version (see Table 1.1.1 for the items not
listed in Table 1.20.1.).
Table 1.20.1. Flash Memory Version Specifications
Item
Specification
Flash memory operating mode
2 modes (CPU rewrite, standard serial I/O)
Erase block
Program method
Erase method
Program, erase control method
Protect method
See Figure 1.20.1 Flash Memory Block Diagram
In units of word
Block erase
Program and erase controlled by software command
The block 0 and block 1 are write protected by bit FMR02.
Number of commands
Program/Erase
Endurance(Note)
Block 0 to 4 (program area)
Data Retention
5 commands
100 times or 1,000 times (See Tables 1.1.5 and 1.1.6 Product code.)
20 years (Topr = 55°C)
ROM code protection
Standard serial I/O mode is supported.
Note: Program and erase endurance definition
Program and erase endurance are the erase endurance of each block. If the program and erase endurance are
n times (n=100,1,000), each block can be erased n times. For example, if a 8-Kbyte block 0 is erased
after writing 1 word data 4096 times, each to different addresses, this is counted as one program and erasure.
However, data cannot be written to the same address more than once without erasing the block. (Rewrite disabled)
Table 1.20.2. Flash Memory Rewrite Modes Overview
Flash memory
rewrite mode
CPU rewrite mode
Standard serial I/O mode
Function
The user ROM area is rewrit- The user ROM area is rewrit-
ten by executing software ten by using a dedicated se-
commands from the CPU. rial programmer.
EW0 mode:
Standard serial I/O mode 1:
Can be rewritten in any Clock sync serial I/O
area other than the flash Standard serial I/O mode 2:
memory
UART
EW1 mode:
Can be rewritten in the
flash memory
Areas which User ROM area
can be rewritten
User ROM area
Operation
mode
ROM
programmer
Single chip mode
Boot mode
Memory expansion mode
(EW0 mode)
Boot mode (EW0 mode)
None
Serial programmer
Rev.5.01 Dec 10, 2009 page 160 of 201
REJ03B0014-0501