參數(shù)資料
型號(hào)： MC68HC705C9AP
廠商： MOTOROLA INC
元件分類： 微控制器/微處理器
英文描述： 8-BIT, OTPROM, 2.1 MHz, MICROCONTROLLER, PDIP40
封裝： PLASTIC, DIP-40
文件頁數(shù)： 110/177頁
文件大?。?/td> 1941K
代理商： MC68HC705C9AP
Memory
Advance Information
MC68HC705C9A — Rev. 4.0
38
Memory
MOTOROLA
2.3 RAM
The main user RAM consists of 176 bytes at $0050–$00FF. This RAM
area is always present in the memory map and includes a 64-byte stack
area. The stack pointer can access 64 bytes of RAM in the range $00FF
down 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.
In MC68HC05C9A configuration, two additional RAM areas are
available at $0020–$004F (48 bytes) and $0100–$017F (128 bytes) (see
Figure 2-1 and Figure 2-2.) These may be accessed at any time by
setting the RAM0 and RAM1 bits, respectively, in the C9A option
(MC68HC05C9A Mode Only) for additional information.
2.4 EPROM
When configured as a C12A the main user EPROM consists of 48 bytes
of page zero EPROM from $0020 to $004F, 12,032 bytes of EPROM
from $1000 to $3EFF, and 14 bytes of user vectors from $3FF4 to
$3FFF. When configured as a C9A, an additional 3,840 bytes of user
EPROM from $0100 to $0FFF are enabled.
Locations $3FF0 and $3FF1 are the mask option registers (MOR) (see
For detailed information on programming the EPROM see Appendix A.
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PDF描述
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參數(shù)描述
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