參數(shù)資料
型號: MC68HC705J2S
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER, CDIP20
封裝: WINDOWED, CERDIP-20
文件頁數(shù): 36/82頁
文件大?。?/td> 2545K
代理商: MC68HC705J2S
MEMORY
Rev. 2
6-5
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2
3
4
5
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8
9
10
11
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20
Take the following steps to program a byte of EPROM:
1. Apply 16.5 V to the IRQ/VPP pin.
2. Set the LATCH bit.
3. Write to any EPROM address.
4. Set the EPGM bit for a time tEPGM to apply the programming voltage.
5. Clear the LATCH bit.
6.1.3.2 EPROM Erasing
The erased state of an EPROM bit is zero. Erase the EPROM by exposing it to 15
Ws/cm2 of ultraviolet light with a wavelength of 2537 angstroms. Position the
ultraviolet light source 1 inch from the EPROM. Do not use a shortwave filter.
NOTE
Windowed packages must have the window covered during
programming and operation.
6.1.4 Bootloader ROM
Addresses $0F01–$0FEF contain the bootloader ROM, which can copy and verify
the contents of an external EPROM to the on-chip EPROM. See SECTION 8
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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相關PDF資料
PDF描述
MC68HC705JP7S 8-BIT, UVPROM, 2.1 MHz, MICROCONTROLLER, CDIP28
MC68HRC705JP7CP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC705SP7CP 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP28
MC68HC705JP7CDW 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO28
MC68HC705JJ7CDW 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDSO20
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