st62t25c STMicroelectronics, st62t25c Datasheet - Page 11

• Manufacturer Part Number: st62t25c
• Description: 8-bit Otp/eprom Mcus With A/d Converter, Oscillator Safeguard, Safe Reset And 28 Pins
• Manufacturer: STMicroelectronics

PROGRAMMING MODES (Cont’d)
1.4.2 Program Memory
EPROM/OTP programming mode is set by a
+12.5V voltage applied to the TEST/V
programming flow of the ST62T15C,T25C/E25C is
described in the User Manual of the EPROM Pro-
gramming Board.
Table 2. ST62T15C Program Memory Map
Table 3. ST62T25C,E25C Program Memory Map
Device Address
Device Address
0FFCh-0FFDh
0FFCh-0FFDh
0FA0h-0FEFh
0FFEh-0FFF h
0FA0h-0FEFh
0FFEh-0FFF h
0FF0h-0FF7h
0FF8h-0FFBh
0FF0h-0FF7h
0FF8h-0FFBh
0000h-087Fh
0880h-0F9Fh
0000h-007Fh
0080h-0F9Fh
NMI Interrupt Vector
NMI Interrupt Vector
Interrupt Vectors
Interrupt Vectors
Reset Vector
Reset Vector
Description
Description
User ROM
User ROM
Reserved
Reserved
Reserved
Reserved
Reserved
Reserved
PP
pin. The
Note: OTP/EPROM devices can be programmed
with the development tools available from STMi-
croelectronics (ST62E2X-EPB or ST622X-KIT).
1.4.3 EPROM Erasing
The EPROM of the windowed package of the
MCUs may be erased by exposure to Ultra Violet
light. The erasure characteristic of the MCUs is
such that erasure begins when the memory is ex-
posed to light with a wave lengths shorter than ap-
proximately 4000Å. It should be noted that sun-
lights and some types of fluorescent lamps have
wavelengths in the range 3000-4000Å.
It is thus recommended that the window of the
MCUs packages be covered by an opaque label to
prevent unintentional erasure problems when test-
ing the application in such an environment.
The recommended erasure procedure of the
MCUs EPROM is the exposure to short wave ul-
traviolet light which have a wave-length 2537A.
The integrated dose (i.e. U.V. intensity x exposure
time) for erasure should be a minimum of 30W-
sec/cm
proximately 30 to 40 minutes using an ultraviolet
lamp with 12000 W/cm
ST62E25C should be placed within 2.5cm (1Inch)
of the lamp tubes during erasure.
2
. The erasure time with this dosage is ap-
ST62T15C/T25C/E25C
2
power rating. The
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