参数资料
型号: MC68HCL05C9AFB
厂商: FREESCALE SEMICONDUCTOR INC
元件分类: 微控制器/微处理器
英文描述: 8-BIT, MROM, 2.1 MHz, MICROCONTROLLER, PQFP44
封装: QFP-44
文件页数: 83/160页
文件大小: 4128K
代理商: MC68HCL05C9AFB
Memory
ROM
MC68HC05C9A Rev. 4.0
General Release Specification
Memory
NON-DISCLOSURE
AGREEMENT
REQUIRED
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.
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Freescale Semiconductor, Inc.
For More Information On This Product,
Go to: www.freescale.com
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