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数据搜索系统，热门电子元器件搜索 |
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数据搜索系统，热门电子元器件搜索 |
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HC705JB2GRS/H 数据表(PDF) 23 Page - NXP Semiconductors |
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HC705JB2GRS/H 数据表(HTML) 23 Page - NXP Semiconductors |
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23 / 128 page  August 28, 1998 GENERAL RELEASE SPECIFICATION MEMORY REV 1.1 2-3 2.3 RAM The user RAM consists of 128 bytes (including the stack) located from $0080 to $00FF. The stack begins at address $00FF and proceeds down to $00C0. Using the stack area for data storage or temporary work locations requires care to pre- vent it from being overwritten due to stacking from an interrupt or subroutine call. 2.4 EPROM The on-chip user EPROM consists of 2048 bytes of EPROM from $1600 to $1DFF and 16 bytes of user vectors from $1FF0 to $1FFF. The bootloader ROM and vectors are located from $1E00 to $1FEF. 12 of the user vectors, $1FF4-$1FFF, are dedicated to reset and interrupt vectors. The four remaining locations, $1FF0-$1FF3, are reserved for test functions. The Mask Option Register is located at $01FF. 2.5 BOOTLOADER ROM Addresses $1E00 to $1FEF are reserved ROM addresses that contain the instructions for the bootloader functions. (See Section 11.) Freescale Semiconductor, Inc. For More Information On This Product, Go to: www.freescale.com |
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