Panasonic MN101C77C User Manual

Chapter 18    Flash EEPROM

XVIII - 2

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: V

DD

=2.7 V to 3.6 V

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.

ˆ

 Load 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.

ˆ

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

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

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.