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CY8C3446PVI-082芯片解密技术文献

时间:2011-09-02 09:15:31

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以下是对CY8C3446PVI-082芯片的简单介绍,可作为参考依据

    Memory Map

    The CY8C34 8051 memory map is very similar to the MCS-51

    memory map.

    Code Space

    The CY8C34 8051 code space is 64 KB. Only main Flash exists

    in this space. See the “Flash Program Memory” section on

    page 18.

    Internal Data Space

    The CY8C34 8051 internal data space is 384 bytes, compressed

    within a 256-byte space. This space consists of 256 bytes of

    RAM (in addition to the SRAM mentioned in “Static RAM” on

    page 18) and a 128-byte space for Special Function Registers

    (SFRs)。 See Figure 5-2. The lowest 32 bytes are used for 4

    banks of registers R0-R7. The next 16 bytes are bit-addressable.

    In addition to the register or bit address modes used with the

    lower 48 bytes, the lower 128 bytes can be accessed with direct

    or indirect addressing. With direct addressing mode, the upper

    128 bytes map to the SFRs. With indirect addressing mode, the

    upper 128 bytes map to RAM. Stack operations use indirect

    addressing; the 8051 stack space is 256 bytes. See the

    “Addressing Modes” section on page 11

    SFRs

    The Special Function Register (SFR) space provides access to

    frequently accessed registers. The memory map for the SFR

    memory space is shown in Table .

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