參數(shù)資料
型號: AT89C5131A-PUTIM
廠商: Atmel
文件頁數(shù): 99/176頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 32K USB 32QFN
標準包裝: 260
系列: AT89C513x
核心處理器: C52X2
芯體尺寸: 8-位
速度: 48MHz
連通性: I²C,SPI,UART/USART,USB
外圍設備: LED,POR,PWM,WDT
輸入/輸出數(shù): 18
程序存儲器容量: 32KB(32K x 8)
程序存儲器類型: 閃存
EEPROM 大?。?/td> 4K x 8
RAM 容量: 1.25K x 8
電壓 - 電源 (Vcc/Vdd): 2.7 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 32-VQFN 裸露焊盤
包裝: 托盤
配用: AT89STK-10-ND - KIT EVAL APPL MASS STORAGE
AT89STK-05-ND - KIT STARTER FOR AT89C5131
29
AT89C5131
4136C–USB–04/05
Overview of FM0
Operations
The CPU interfaces to the Flash memory through the FCON register and AUXR1
register.
These registers are used to:
Map the memory spaces in the adressable space
Launch the programming of the memory spaces
Get the status of the Flash memory (busy/not busy)
Select the Flash memory FM0/FM1.
Mapping of the Memory Space By default, the user space is accessed by MOVC instruction for read only. The column
latches space is made accessible by setting the FPS bit in FCON register. Writing is
possible from 0000h to 7FFFh, address bits 6 to 0 are used to select an address within a
page while bits 14 to 7 are used to select the programming address of the page.
Setting this bit takes precedence on the EXTRAM bit in AUXR register.
The other memory spaces (user, extra row, hardware security) are made accessible in
the code segment by programming bits FMOD0 and FMOD1 in FCON register in accor-
dance with Table 34. A MOVC instruction is then used for reading these spaces.
Table 34. FM0 Blocks Select Bits
Launching Programming
FPL3:0 bits in FCON register are used to secure the launch of programming. A specific
sequence must be written in these bits to unlock the write protection and to launch the
programming. This sequence is 5 followed by A. Table 35 summarizes the memory
spaces to program according to FMOD1:0 bits.
Table 35. Programming Spaces
FMOD1
FMOD0
FM0 Adressable Space
0
User (0000h-FFFFh)
0
1
Extra Row(FF80h-FFFFh)
1
0
Hardware Security (0000h)
1
reserved
Write to FCON
Operation
FPL3:0
FPS
FMOD1
FMOD0
User
5
X
0
No action
AX
0
Write the column latches in user
space
Extra Row
5
X
0
1
No action
AX
0
1
Write the column latches in extra row
space
Security
Space
5
X
1
0
No action
A
X
1
0
Write the fuse bits space
Reserved
5
X
1
No action
A
X
1
No action
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