TS87C58X2-VCC Atmel, TS87C58X2-VCC Datasheet - Page 40
![no-image](/images/manufacturer_photos/0/0/78/atmel_sml.jpg)
TS87C58X2-VCC
Manufacturer Part Number
TS87C58X2-VCC
Description
IC MCU 8BIT 32K OTP 40MHZ 44PQFP
Manufacturer
Atmel
Series
87Cr
Datasheet
1.TS87C54X2-LIC.pdf
(62 pages)
Specifications of TS87C58X2-VCC
Core Processor
8051
Core Size
8-Bit
Speed
40/30MHz
Connectivity
UART/USART
Peripherals
POR, WDT
Number Of I /o
32
Program Memory Size
32KB (32K x 8)
Program Memory Type
OTP
Ram Size
256 x 8
Voltage - Supply (vcc/vdd)
4.5 V ~ 5.5 V
Oscillator Type
Internal
Operating Temperature
0°C ~ 70°C
Package / Case
44-MQFP, 44-PQFP
Lead Free Status / RoHS Status
Contains lead / RoHS non-compliant
Eeprom Size
-
Data Converters
-
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
17.4
17.4.1
18. Signature Bytes
40
EPROM Erasure (Windowed Packages Only)
AT/TS8xC54/8X2
Erasure Characteristics
D0-D7
ALE/PROG
EA/VPP
A0-A12
C o n t r o l
signals
The encryption array cannot be directly verified. Verification of the encryption array is done by
observing that the code array is well encrypted.
Figure 17-2. Programming and Verification Signal’s Waveform
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 1’s state (FF).
The recommended erasure procedure is exposure to ultraviolet light (at 2537 Å) to an integrated
dose at least 15 W-sec/cm
ing 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 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 sub-
jects the device to this type of exposure, it is suggested that an opaque label be placed over the
window.
The
bytes follow the procedure for EPROM verify but activate the control lines provided in Table 31.
for Read Signature Bytes. Table 18-1. shows the content of the signature byte for the
TS80C54/58X2.
12.75V
5V
0V
TS87C54/58X2
Programming Cycle
Data In
has four signature bytes in location 30h, 31h, 60h and 61h. To read these
1 0 0
μ
s
2
. Exposing the EPROM to an ultraviolet lamp of 12,000 μW/cm
Read/Verify Cycle
Data Out
4431E–8051–04/06
2
rat-