參數(shù)資料
型號: AT89C5131A-PUTIM
廠商: Atmel
文件頁數(shù): 112/176頁
文件大?。?/td> 0K
描述: IC 8051 MCU FLASH 32K USB 32QFN
標(biāo)準(zhǔn)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(shè)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
39
AT89C5131
4136C–USB–04/05
The two lock bits provide different levels of protection for the on-chip code and data,
when programmed as shown to Table 41.
Table 41. Program Lock Bits of the SSB
Notes:
1. U: unprogrammed or "one" level.
2. P: programmed or “zero” level.
3. X: don’t care
4. WARNING: Security level 2 and 3 should only be programmed after Flash and code
verification.
Flash Memory Status
AT89C5131 parts are delivered with the ISP boot in the Flash memory. After ISP or par-
allel programming, the possible contents of the Flash memory are summarized in Figure
Figure 19. Flash Memory Possible Contents
Memory Organization
In the AT89C5131, the lowest 16K or 32K of the 64 Kbyte program memory address
space is filled by internal Flash.
When the EA is pin high, the processor fetches instructions from internal program Flash.
Bus expansion for accessing program memory from 16K or 32K upward is automatic
since external instruction fetches occur automatically when the program counter
exceeds 3FFFh (16K) or 7FFFh (32K). If the EA pin is tied low, all program memory
fetches are from external memory. If all storage is on chip, then byte location 3FFFh
(16K) or 7FFFh (32K) should be left vacant to prevent and undesired pre-fetch from
external program memory address 4000h (16K) or 8000h (32K).
Program Lock Bits
Protection Description
Security
Level
LB0
LB1
1
U
No program lock features enabled.
2
P
U
ISP programming of the Flash is disabled.
3
X
P
Same as 2, also verify through ISP programming interface is disabled.
0000h
Virgin
Default
Virgin
After ISP
After parallel
programming
After parallel
programming
After parallel
programming
Application
After ISP
or
Dedicated
ISP
Dedicated
ISP
Application
Virgin
or
Application
Virgin
or
Application
3FFFh AT89C5130A
7FFFh AT89C5131A
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