M16C62P_06 Datasheet, PDF (286/421 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/60 SERIES

M16C/62P Group (M16C/62P, M16C/62PT)
22. Flash Memory Version
Table 22.2 Flash Memory Rewrite Modes Overview
Flash Memory
Rewrite Mode
CPU rewrite Mode ⁽¹⁾
Standard Serial I/O Mode
Parallel I/O Mode
Function
The User ROM area is rewritten when The user ROM area is
The boot ROM area and
the CPU executes software commands. rewritten using a dedicated user ROM area is rewritten
EW0 mode:
serial programmer.
using a dedicated parallel
Rewrite in areas other than flash
Standard serial I/O mode 1: programmer.
memory ⁽²⁾
Clock synchronous serial I/O
EW1 mode:
Standard serial I/O mode 2:
Can be rewritten in the flash memory UART
Areas which User ROM area
User ROM area
User ROM area
can be
Boot ROM area
Rewritten
Operating
Single-chip mode
Boot mode
Parallel I/O mode
Mode
Memory expansion mode (EW0 mode)
Boot mode (EW0 mode)
ROM
None
Serial programmer
Parallel programmer
Programmer
NOTES:
1. The PM13 bit remains set to “1” while the FMR01 bit in the FMR0 register = 1 (CPU rewrite mode enabled). The
PM13 bit is reverted to its original value by clearing the FMR01 bit to “0” (CPU rewrite mode disabled).
However, if the PM13 bit is changed during CPU rewrite mode, its changed value is not reflected until after the
FMR01 bit is cleared to “0”.
2. When in CPU rewrite mode, the PM10 and PM13 bits in the PM1 register are set to “1”. The rewrite control
program can only be executed in the internal RAM or in an external area that is enabled for use when the PM13
bit = 1. When the PM13 bit = 0 and the flash memory is used in 4-Mbyte mode, the extended accessible area
(40000h to BFFFFh) cannot be used.
Rev.2.41 Jan 10, 2006 Page 271 of 390
REJ09B0185-0241