st92f120 STMicroelectronics, st92f120 Datasheet - Page 40

• Manufacturer Part Number: st92f120
• Description: 8/16-bit Flash Mcu Family With Ram, Eeprom And J1850 Blpd
• Manufacturer: STMicroelectronics

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
– 4 main sectors for code
– 2 sectors of the same size for EEPROM emula-
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
Table 7. Memory Structure for 128K Flash Device
Table 8. Memory Structure for 60K Flash Device
40/324
9
including user OTP area)
tion
Protection Registers (reserved)
Protection Registers (reserved)
TestFlash (TF) (Reserved)
TestFlash (TF) (Reserved)
Emulated EEPROM
Emulated EEPROM
EEPROM 0 (E0)
EEPROM 1 (E1)
EEPROM 1 (E1)
EEPROM 0 (E0)
Flash 0 (F0)
Flash 1 (F1)
Flash 2 (F2)
Flash 3 (F3)
Flash 0 (F0)
Flash 1 (F1)
Flash 2 (F2)
OTP Area
OTP Area
Reserved
Sector
Sector
231FFCh to 231FFFh
01C000h to 01DFFFh
22C000h to 22CFFFh
231FFCh to 231FFFh
01C000h to 01DFFFh
22C000h to 22CFFFh
231F80h to 231FFBh
010000h to 01BFFFh
01E000h to 01FFFFh
231F80h to 231FFBh
010000h to 01BFFFh
000000h to 00FFFFh
228000h to 228FFFh
000000h to 000FFFh
001000h to 00FFFFh
228000h to 228FFFh
230000h to 231F7Fh
220000h to 2203FFh
230000h to 231F7Fh
220000h to 2203FFh
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).
Addresses
Addresses
8064 bytes
8064 bytes
64 Kbytes
48 Kbytes
60 Kbytes
48 Kbytes
124 bytes
124 bytes
Max Size
Max Size
8 Kbytes
8 Kbytes
4 Kbytes
4 Kbytes
4 Kbytes
8 Kbytes
4 Kbytes
4 Kbytes
1 Kbyte
4 bytes
4 bytes
1Kbyte