Chapter 18 Flash EEPROM

18-1 Overview

18-1-1 Overview

The MN101CF77G is equivalent to MN101C77C except its Mask ROM is substituted with 128 KB of flash

EEPROM.

Operating voltage of MN101CF77G is as follows.

MN101CF77G Operating voltage: VDD=2.7 V to 3.6 V

Normal operation is guaranteed with up to ten programmings. *1

The MN101CF77G is programmed in one of two modes;

PROM writer mode, which uses a dedicated PROM writer for a microcontroller's stand-alone program- ming. Onboard programming mode, which the CPU controls programming of a microcontroller on a target board.

The 128 KB flash EEPROM is divided into two main areas.

ˆLoad program area (8 KB : X'04000' to X'05FFF')

This area stores a load program for onboard programming mode. This area is overwritten only in PROM writer mode. This area is write/erase-protected in the hardware during onboard programming mode.

ˆUser program area (120 KB : X'06000' to X'23FFF')

This area stores an user program. It is overwritten in both programming modes.

*1 1 cycle of "erase-write" process is counted as 1 programming in every block.

That is, when several blocks are programmed one-time separately, programming count is added by just the number of programming cycle. (For instance, when block 1, 2 and 3 are programmed separately, 3 program count is added.)

Therefore, program several blocks together to reduce the programming count.

XVIII-2 Overview

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Panasonic MN101C77C, F77G user manual Eeprom, XVIII-2 Overview