TS80C52X2 ATMEL Corporation, TS80C52X2 Datasheet - Page 35

• Manufacturer Part Number: TS80C52X2
• Description: 8-bit Microcontroller
• Manufacturer: ATMEL Corporation

Signature Bytes
4184I–8051–02/08
12,000 µW/cm
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 Å. 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.
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
30h
31h
60h
60h
60h
61h
2
rating for 30 minutes, at a distance of about 25 mm, should be sufficient.
Contents
ADh
2Dh
FFh
58h
57h
20h
Comment
Manufacturer Code: Atmel
Family Code: C51 X2
Product name: TS80C52X2
Product name:TS87C52X2
Product name: TS80C32X2
Product revision number
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