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參數(shù)資料
| 型號： | MTA85412S-04I/SS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 8-BIT, OTPROM, 4 MHz, RISC MICROCONTROLLER, PDSO20 |
| 封裝： | 0.209 INCH, PLASTIC, SSOP-20 |
| 文件頁數(shù)： | 67/72頁 |
| 文件大?。?/td> | 760K |
| 代理商： | MTA85412S-04I/SS |
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1995 Microchip Technology Inc.
DS40115C-page 7
MTA85XXX
3.0
FACTORY PROGRAMMING
OPTIONS
A variety of EPROM program memory sizes, EEPROM
data
memory
sizes
and
frequency ranges
are
available. Depending on the application and production
requirements, the proper device option can be selected
using the information in Table 1-1 and Table 1-2. When
placing orders, please use the “MTA85XXX Product
Identification System” on the back page of this data
sheet to specify the correct part.
3.1
One-Time-Programmable (OTP)
Devices
The availability of OTP devices is especially useful for
customers expecting frequent code changes and
updates.
With OTP devices the program EPROM is erased,
allowing the user to write the application code into it.
Additionally the watchdog timer can be disabled, and/
or the code protection logic can be activated by
programming special EPROM fuses. 16 non-dedicated
EPROM bits are available for the customer ID or other
customer information and are also user programmable.
3.2
Quick-Turn-Production (QTP) Devices
Microchip offers a QTP Programming Service for
factory production orders. This service is made
available for volume users with stable code, who
choose not to program the devices themselves. A QTP
device is identical to an OTP device, except that the
program memory and special EPROM fuses are
programmed at the factory, with the customer’s code.
Certain code and prototype verification procedures do
apply before production shipments are available.
Please contact your Microchip Technology Inc. sales
office for more details.
3.3
Serialized-Quick-Turnaround-
Production (SQTP) Devices
Microchip offers the unique programming service
where few locations in each device are programmed
with different serial numbers. The serial numbers may
be random, pseudo-random or sequential.
Serial programming allows each device to have a
unique number which can serve as an entry-code,
password or ID number.
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