M16C30P_07 Datasheet, PDF (244/317 Pages) Renesas Technology Corp – 16-BIT SINGLE-CHIP MICROCOMPUTER M16C FAMILY / M16C/30 SERIES

M16C/30P Group
20. One Time Flash Version
20. One Time Flash Version
The one time flash version microcomputer has the same functions as the masked ROM version except the built-in flash
memory. The flash memory will be referred to as the one time flash memory in the one time flash version chapter.
The one time flash memory can be written in standard serial I/O mode. It cannot be erased. Table 20.1 lists One Time
Flash Memory Version Specifications. See Table 1.1 Performance Outline of M16C/30P Group for the items not
listed in Table 20.1.
Table 20.1 One Time Flash Memory Version Specifications
Item
Specification
Program Method
In units of word
Program Endurance
1 time
Data Retention
10 years
ROM Code Protection
Parallel I/O modes and standard serial I/O modes are supported
Table 20.2 One Time Flash Memory Rewrite Modes Overview
Flash Memory Rewrite
Mode
Standard Serial I/O Mode
Parallel I/O Mode
The user ROM area is written using a Boot ROM area and user ROM area
dedicated serial programmer.
are rewritten using a dedicated
Function
Standard serial I/O mode 1:
Clock synchronous serial I/O
parallel programmer.
Standard serial I/O mode 2:
UART
ROM Programmer
Serial programmer
Parallel programmer
Rev.1.22 Mar 29, 2007 Page 228 of 291
REJ09B0179-0122