12,000 W/cm2 rating for 30 minutes, at a distance of abo" />
參數(shù)資料
型號: AT87C52X2-RLRUM
廠商: Atmel
文件頁數(shù): 29/55頁
文件大?。?/td> 0K
描述: MCU ROMLESS 32X2 3V 44-VQFP
標(biāo)準(zhǔn)包裝: 1,500
系列: 87C
核心處理器: 8051
芯體尺寸: 8-位
速度: 40/20MHz
連通性: UART/USART
外圍設(shè)備: POR
輸入/輸出數(shù): 32
程序存儲(chǔ)器容量: 8KB(8K x 8)
程序存儲(chǔ)器類型: OTP
RAM 容量: 256 x 8
電壓 - 電源 (Vcc/Vdd): 4.5 V ~ 5.5 V
振蕩器型: 內(nèi)部
工作溫度: -40°C ~ 85°C
封裝/外殼: 44-LQFP
包裝: 帶卷 (TR)
35
TS8xCx2X2
4184I–8051–02/08
12,000 W/cm2 rating for 30 minutes, at a distance of about 25 mm, should be sufficient.
An exposure of 1 hour is recommended with most of standard erasers.
Erasure of the EPROM begins to occur when the chip is exposed to light with wave-
length shorter than approximately 4,000 . Since sunlight and fluorescent lighting have
wavelengths in this range, exposure to these light sources over an extended time (about
1 week in sunlight, or 3 years in room-level fluorescent lighting) could cause inadvertent
erasure. If an application subjects the device to this type of exposure, it is suggested
that an opaque label be placed over the window.
Signature Bytes
The TS80/87C52X2 has four signature bytes in location 30h, 31h, 60h and 61h. To read
these bytes follow the procedure for EPROM verify but activate the control lines pro-
vided in Table 31. for Read Signature Bytes. Table 35. shows the content of the
signature byte for the TS80/87C52X2.
Table 21. Signature Bytes Content
Location
Contents
Comment
30h
58h
Manufacturer Code: Atmel
31h
57h
Family Code: C51 X2
60h
2Dh
Product name: TS80C52X2
60h
ADh
Product name:TS87C52X2
60h
20h
Product name: TS80C32X2
61h
FFh
Product revision number
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