參數(shù)資料
型號(hào): MC68HSR705J1ACP
廠商: FREESCALE SEMICONDUCTOR INC
元件分類: 微控制器/微處理器
英文描述: 8-BIT, OTPROM, MICROCONTROLLER, PDIP20
封裝: PLASTIC, DIP-20
文件頁數(shù): 95/162頁
文件大?。?/td> 3213K
代理商: MC68HSR705J1ACP
Technical Data
MC68HC705J1A — Rev. 4.0
Memory
Memory
2.6 EPROM/OTPROM
A microcontroller unit (MCU) with a quartz window has 1240 bytes of
erasable, programmable ROM (EPROM). The quartz window allows
EPROM erasure with ultraviolet light.
NOTE:
Keep the quartz window covered with an opaque material except when
programming the MCU. Ambient light can affect MCU operation.
In an MCU without the quartz window, the EPROM cannot be erased
and serves as 1240 bytes of one-time programmable ROM (OTPROM).
These addresses are user EPROM/OTPROM locations:
$0300–$07CF
$07F8–$07FF, used for user-defined interrupt and reset vectors
The computer operating properly (COP) register (COPR) is an
EPROM/OTPROM location at address $07F0.
The mask option register (MOR) is an EPROM/OTPROM location at
address $07F1.
2.6.1 EPROM/OTPROM Programming
The two ways to program the EPROM/OTPROM are:
1. Manipulating the control bits in the EPROM programming register
to program the EPROM/OTPROM on a byte-by-byte basis
2. Programming the EPROM/OTPROM with the M68HC705J
in-circuit simulator (M68HC705JICS) available from Freescale
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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