參數(shù)資料
型號： MC68HCL05C9A
廠商： Motorola, Inc.
元件分類： 8位微控制器
英文描述： 8-Bit Microcontroller(8位微控制器)
中文描述： 8位微控制器（8位微控制器）
文件頁數(shù)： 29/160頁
文件大?。?/td> 783K
代理商： MC68HCL05C9A
Memory
ROM
MC68HC05C9A
—
Rev. 4.0
General Release Specification
MOTOROLA
Memory
29
L
G
R
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.
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 option register.
Refer to
1.5 Software-Programmable Options
for additional
information.
2.4 ROM
The user ROM consists of 48 bytes of page zero ROM from $0020 to
$004F, 15,872 bytes of ROM from $0100 to $3EFF, and 16 bytes of user
vectors from $3FF0 to $3FFF.
2.5 ROM Security
A security feature has been incorporated into the MC68HC05C9A to
help prevent external access to the contents of the ROM in any mode of
operation.
2.6 I/O Registers
Except for the option register, all I/O, control and status registers are
located within one 32-byte block in page zero of the address space
($0000–$001F). A summary of these registers is shown in
Figure 2-2
.
More detail about the contents of these registers is given in two
diagrams, each showing a block of 16 registers.
Figure 2-3
shows
registers $0000 to $000F and
Figure 2-4
shows registers $0010 to
$001F.
相關(guān)PDF資料
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