ST92F120R1Q7 View Datasheet(PDF) - STMicroelectronics
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Description
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ST92F120R1Q7 Datasheet PDF : 324 Pages
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ST92F120 - SINGLE VOLTAGE FLASH & EEPROM
3.2 FUNCTIONAL DESCRIPTION
3.2.1 Structure
The Flash memory is composed of three parts
(see following table):
– 1 reserved sector for system routines (TestFlash
including user OTP area)
– 4 main sectors for code
– 2 sectors of the same size for EEPROM emula-
tion
The last 128 bytes of the TestFlash are available
to the user as an OTP area. The user can program
these bytes, but cannot erase them. The last 4
bytes of this OTP area (231FFCh to 231FFFh ) are
reserved for the Non-Volatile Protection registers
and cannot be used as a storage area (see Sec-
tion 3.6 PROTECTION STRATEGY for more de-
tails).
3.2.2 EEPROM Emulation
A hardware EEPROM emulation is implemented
using special flash sectors E0 and E1 to emulate
an EEPROM memory whose size is 1/4 of a sector
(1 Kbyte). This EEPROM can be directly ad-
dressed from 220000h to 2203FFh.
(see Section 3.5.1 Hardware EEPROM Emulation
for more details).
Table 7. Memory Structure for 128K Flash Device
Sector
TestFlash (TF) (Reserved)
OTP Area
Protection Registers (reserved)
Flash 0 (F0)
Flash 1 (F1)
Flash 2 (F2)
Flash 3 (F3)
EEPROM 0 (E0)
EEPROM 1 (E1)
Emulated EEPROM
Addresses
230000h to 231F7Fh
231F80h to 231FFBh
231FFCh to 231FFFh
000000h to 00FFFFh
010000h to 01BFFFh
01C000h to 01DFFFh
01E000h to 01FFFFh
228000h to 228FFFh
22C000h to 22CFFFh
220000h to 2203FFh
Table 8. Memory Structure for 60K Flash Device
Max Size
8064 bytes
124 bytes
4 bytes
64 Kbytes
48 Kbytes
8 Kbytes
8 Kbytes
4 Kbytes
4 Kbytes
1 Kbyte
Sector
TestFlash (TF) (Reserved)
OTP Area
Protection Registers (reserved)
Flash 0 (F0)
Reserved
Flash 1 (F1)
Flash 2 (F2)
EEPROM 0 (E0)
EEPROM 1 (E1)
Emulated EEPROM
Addresses
230000h to 231F7Fh
231F80h to 231FFBh
231FFCh to 231FFFh
000000h to 000FFFh
001000h to 00FFFFh
010000h to 01BFFFh
01C000h to 01DFFFh
228000h to 228FFFh
22C000h to 22CFFFh
220000h to 2203FFh
Max Size
8064 bytes
124 bytes
4 bytes
4 Kbytes
60 Kbytes
48 Kbytes
8 Kbytes
4 Kbytes
4 Kbytes
1Kbyte
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