参数资料
型号: MC68HC705RC17P
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, OTPROM, 2.097 MHz, MICROCONTROLLER, PDIP28
封装: PLASTIC, DIP-28
文件页数: 49/126页
文件大小: 3079K
代理商: MC68HC705RC17P
Memory
Input/Output Programming
MC68HC705RC17 Rev. 2.0
General Release Specification
Memory
NON-DISCLOSURE
AGREEMENT
REQUIRED
2.3.3 RAM
The user RAM consists of 352 bytes of a shared stack area. The RAM
starts at address $0020 and ends at address $017F. The stack begins
at address $00FF. The stack pointer can access 64 bytes of RAM in the
range $00FF to $00C0.
NOTE:
Using the stack area for data storage or temporary work locations
requires care to prevent it from being overwritten due to stacking from an
interrupt or subroutine call.
2.3.4 Bootloader ROM
Addresses $0020 to $00AF, $0100 to $0170, and $3FB0 to $3FEF are
reserved ROM addresses that contain the instructions for the bootloader
functions. (See Section 11. EPROM.)
2.4 Input/Output Programming
In user mode, 18 lines are arranged as three 8-bit I/O ports. These ports
are programmable as either inputs or outputs under software control of
the data direction registers. For detailed information, refer to Section 7.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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