Lucent Technologies MN10285K - Manual (Page 317)

MN102HF75K Flash EEPROM Version
Description
Panasonic Semiconductor Development Company MN102H75K/F75K/85K/F85K LSI User Manual
316
Panasonic
Appendix B MN102HF75K Flash EEPROM Version
B.1 Description
The MN102HF75K and MN102HF85K are electrically programmable, 256-
kilobyte flash ROM versions of the MN102H75K and MN102H85K. They are
programmed in one of two modes:
■ PROM writer mode, which uses a dedicated adaptor socket and writer. In
this mode, the user program can occupy the entire 256-kilobyte ROM space.
■ Onboard serial programming mode, which the CPU controls. This mode
requires an 8-kilobyte ROM area to hold a serial writer program.
A cycle of erasing to programing is
counted as one time no matter how
many blocks are rewritten.Even
when the multi-block is rewritten
separately or the same block is
rewritten, each block rewrite is
counted.For example,rewriting
Block1,Block2 and Block3 respec-
tively is counted as 3 times. There-
fore, to program efficiently, rewrite
all blocks in the lump.
In onboard serial programming mode, the 256-kilobyte flash memory is divided
into three main areas:
■ Load program area (1 kilobyte: x’0x80000 to x’0x803FF) This area stores the
load program for the serial writer. It is overwritten in PROM writer mode.
■ Fixed user program area (7 kilobytes: x’0x80400 to x’0x81FFD) This area
stores a user program that is write-protected in serial programming mode. It
is overwritten in PROM writer mode.
■ User program area (248 kilobytes: x’0x82000 to x’0xBFFFD) This area
stores the user program. It is overwritten in both programming modes.
The two words x’0x81FFE’ and x’0xBFFFE’ are test areas. Do not use these two
words in your programs.
Table B-1 summarizes the programmable areas for the modes. Normal operation
is guaranteed with up to ten programmings.
Table B-1 Programmable Areas in Each Programming Mode
Programming Mode Programmable Area
PROM writer programming mode Entire memory space (256 KB)
Onboard serial programming mode User program area (248 KB)
Note: The shaded regions are write-protected in this mode. Cross-hatched regions are
test areas (not for use in user programs).
Figure B-1 Memory Map for Onboard Serial Programming Mode
Load program area
1 KB
248 KB
x'0x80000'
x'0xBFFFF'
Fixed user program area
User program area
7 KB
x'0x80400'
x'0x82000'
Test area (1 word)
Test area (1 word)
x'0x81FFE'
x'0xBFFFC'