參數(shù)資料
型號(hào)： PSD4256G6V-10UIT
廠商： STMICROELECTRONICS
元件分類： 微控制器/微處理器
英文描述： 1M X 8 FLASH, 52 I/O, PIA-GENERAL PURPOSE, PQFP80
封裝： PLASTIC, TQFP-80
文件頁數(shù)： 57/127頁
文件大?。?/td> 1091K
代理商： PSD4256G6V-10UIT
PSD4256G6V
Detailed operation
Table 30.
8-bit instructions
Instruction(1)
FS0-FS7 or
CSBOOT0-
CSBOOT3
Cycle 1
Cycle 2
Cycle 3
Cycle 4
Cycle 5
Cycle 6
Cycle 7
READ(2)
1
“Read”
RD @ RA
READ Main Flash
ID(3)(4)
1
AAh@
555h
55h@
AAAh
90h@
555h
READ
ID@ 01h
READ Sector
Protection(3)(4)(5)
1
AAh@
555h
55h@
AAAh
90h@
555h
Read 00h
or 01h @
02h
Program a Flash
Word(4)
1
AAh@
555h
55h@
AAAh
A0h@
555h
PD@ PA
Flash Sector
Erase(4)(6)
1
AAh@
555h
55h@
AAAh
80h@
555h
AAh@
555h
55h@
AAAh
30h@
SA
30h(7)@
next SA
Flash Bulk Erase(4)
1
AAh@
555h
55h@
AAAh
80h@
555h
AAh@
555h
55h@
AAAh
10h@
555h
Suspend Sector
Erase(7)
1
B0h@
XXXh
Resume Sector
Erase(8)
1
30h@
XXXh
1
F0h@
XXXh
Unlock Bypass
1
AAh@
555h
55h@
AAAh
20h@
555h
Unlock Bypass
Program(9)
1
A0h@
XXXh
PD@ PA
Unlock Bypass
Reset(10)
1
90h@
XXXh
00h@
XXXh
1.
All WRITE bus cycles in an instruction are byte-WRITE to an even address (555h or AAAh). A Flash memory Program bus
cycle writes a word to an even address.
2.
No Unlock or instruction cycles are required when the device is in the Read mode.
3.
The RESET instruction is required to return to the Read mode after reading the Flash ID, or after reading the Sector
Protection Status, or if the Error Flag bit (DQ5/DQ13) goes High.
4.
The MCU cannot invoke these instructions while executing code from the same Flash memory as that for which the
instruction is intended. The MCU must retrieve, for example, the code from the secondary Flash memory when reading the
Sector Protection Status of the primary Flash memory.
5.
The data is 00h for an unprotected sector, and 01h for a protected sector. In the fourth cycle, the Sector Select is active,
and (A1,A0) = (1,0).
6.
Additional sectors to be erased must be written at the end of the Sector Erase instruction within 80 s.
7.
The system may perform READ and Program cycles in non-erasing sectors, read the Flash ID or read the Sector
Protection Status when in the Suspend Sector Erase mode. The Suspend Sector Erase instruction is valid only during a
Sector Erase cycle.
8.
The Resume Sector Erase instruction is valid only during the Suspend Sector Erase mode.
9.
The Unlock Bypass instruction is required prior to the Unlock Bypass program instruction.
10. The Unlock Bypass Reset Flash instruction is required to return to reading memory data when the device is in the Unlock
Bypass mode.
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