T80C5112-RKFCL datasheet(77/97 Pages) ATMEL

77 / 97 page

Rev. B - November 10, 2000

Preliminary

T80C5112

Figure 34. Programming and Verification Signal’s Waveform

17.4. EPROM Erasure (Windowed Packages Only)

Erasing the EPROM erases the code array, the encryption array and the lock bits returning the parts to full

functionality.

Erasure leaves all the EPROM cells in a 1Õs state (FF).

17.4.1. Erasure Characteristics

The recommended erasure procedure is exposure to ultraviolet light (at 2537 ) to an integrated dose at least 15

W-sec/cm2. Exposing the EPROM to an ultraviolet lamp of 12,000

m 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 wavelength 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.

17.5. Signature Bytes

17.5.1. Signature bytes content

The T80C5112 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 provided in xxxx for Read Signature Bytes. Table 51. shows the

content of the signature byte for the T80C5112.

Table 51. Signature Bytes Content

Location

Contents

Comment

30h

58h

Manufacturer Code: Atmel Wireless & Microcontrollers

31h

57h

Family Code: C51 X2

60h

2Dh

Product name: T80C5112 8K ROM version

60h

ADh

Product name: T80C5112 8K OTP version

61h

EFh

Product revision number : T80C5112 Rev.0

Control

signals

Data In

ALE/PROG

A0-A12

Programming Cycle

100

m s

D0-D7

RST/VPP

Data Out

Read/Verify Cycle

12.75V

T80C5112-RKFCL 数据表(PDF) 77 Page - ATMEL Corporation

T80C5112-RKFCL 数据表(HTML) 77 Page - ATMEL Corporation

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97

数据表下载