CD00001237 datasheet(15/105 Pages) STMICROELECTRONICS

15 / 105 page

ST6215C ST6225C

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3.2 PROGRAMMING MODES

3.2.1 Program Memory

EPROM/OTP programming mode is set by a

+12.5V voltage applied to the TEST/VPP pin. The

programming flow of the ST62T15C,T25C/E25C is

described in the User Manual of the EPROM Pro-

gramming Board.

Table 3. ST6215C Program Memory Map

Table 4. ST6225C Program Memory Map

Note: OTP/EPROM devices can be programmed

with

the

development

tools

available

from

STMicroelectronics (please refer to Section 13 on

page 100).

3.2.2 EPROM Erasing

The EPROM devices can be erased by exposure

to Ultra Violet light. The characteristics of the MCU

are such that erasure begins when the memory is

exposed to light with a wave lengths shorter than

approximately 4000Å. It should be noted that sun-

light and some types of fluorescent lamps have

wavelengths in the range 3000-4000Å.

It is thus recommended that the window of the

MCU 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 is exposure

to short wave ultraviolet light which have a wave-

length 2537Å. The integrated dose (i.e. U.V. inten-

sity x exposure time) for erasure should be a mini-

mum of 30W-sec/cm2. The erasure time with this

dosage is approximately 30 to 40 minutes using an

ultraviolet lamp with 12000µW/cm2 power rating.

The EPROM device should be placed within

2.5cm (1inch) of the lamp tubes during erasure.

Device Address

Description

0000h-087Fh

0880h-0F9Fh

0FA0h-0FEFh

0FF0h-0FF7h

0FF8h-0FFBh

0FFCh-0FFDh

0FFEh-0FFFh

Reserved

User ROM

Reserved

Interrupt Vectors

Reserved

NMI Interrupt Vector

Reset Vector

Device Address

Description

0000h-007Fh

0080h-0F9Fh

0FA0h-0FEFh

0FF0h-0FF7h

0FF8h-0FFBh

0FFCh-0FFDh

0FFEh-0FFFh

Reserved

User ROM

Reserved

Interrupt Vectors

Reserved

NMI Interrupt Vector

Reset Vector

CD00001237 Datasheet(PDF) 15 Page - STMicroelectronics

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