Renesas M16C FAMILY Manual de usuario descargar pdf (Pagina 12)

MONOS-type FLASH

(MONOS = Metal Oxide

Nitride Oxide Silicon)

2004 2005 2006 2007 2008 2009 2010 2011 2012 2013 2014

Memory Structure

50 MHz

(180nm)

MONOS

80MHz

100MHz

(150nm)

MONOS

100MHz

(90nm)

MONOS

1 Billion Flash MCUs

shipped by 2007!

Next-Generation Non-volatile Memory

- MRAM

- PRAM (Phase Change RAM)

Stacked-type

(NOR) Flash HND

80MHz

(200 - 180nm)

NOR

80MHz

(150nm)

NOR

133MHz

(65nm)

New

NVM

166MHz

(45nm)

MRAM

80MHz

(130nm)

NOR

Flash Memory Roadmap

New

NVM

■ REASON #6: FLEXIBLE AND TRUSTED FLASH

#1 Supplier of Flash-based MCUs in the World

Renesas Technology has been an industry leader in flash-based MCUs for over a decade and has already shipped over 1 Billion

of these devices. As a technology innovator, Renesas continues to invest in research and development of faster and denser

memory technologies that can be incorporated in future generations of microcontrollers.

RS232 I/F

Dedicated I/F

User Target

Programmer Mode Option

Boot Mode Option

CPU

Block 0

…

Block n

CPU/User Mode Option

Rewrite

Program

Block 1

Rewrite

Program

FLASH

RAM

Reading/writing

prohibited

ROM Code Protection Flash writer (parallel rewrite supported)

0101000110010110010110001010010110

ID Code

Protection

Top Reasons to select the M16C Platform

™

Flexible Flash Programming

• Programmer Mode: MCUs can be

programmed using an external box such as

a parallel programmer or debug emulator.

• Boot Mode: Built-in boot loader program

allows PC connection throug h RS232 interface

for easy programming.

• CPU/User Mode: Customer can develop custom

bootloader program to rewrite the flash memory.

The rewrite program can be transferred to RAM

when all flash memory contents need to be changed.

Secured Contents

• ROM Code Protect bits prevent reading or rewriting of the

on-chip flash memory when using a parallel programmer.

• Similarly, during serial programming, the Flash Memory

ID Code protection feature prevents unauthorized access.

The multi-byte ID sent by the serial programmer must

match the ID previously set by the user in order to access

the flash memory.

• Individual flash blocks can also be set to an Execute-Only

Mode to prevent undesired reading or rewriting.

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Renesas M16C FAMILY Manual de usuario Pagina 12

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