CY7C68013-100AC 参数 Datasheet PDF下载

CY7C68013

Two memory maps are shown in the following diagrams:

Figure 3-1

Internal Code Memory, EA = 0

Figure 3-2

External Code Memory, EA = 1.

3.9.2

Internal Code Memory, EA = 0

This mode implements the internal eight-kbyte block of RAM (starting at 0) as combined code and data memory. When external

RAM or ROM is added, the external read and write strobes are suppressed for memory spaces that exist inside the chip. This

allows the user to connect a 64-kbyte memory without requiring address decodes to keep clear of internal memory spaces.

Only the

internal

eight kbytes and

scratch pad

0.5 kbytes RAM spaces have the following access:

• USB download

• USB upload

• Setup data pointer

• I

2

C-compatible interface boot load.

Inside FX2

FFFF

7.5 kbytes

US B regs and

4k EP buffers

(RD#,WR#)

E200

E1FF

0.5 kbytes RAM

E000 Data (RD#,WR#)*

Outside FX2

(OK to populate

data memory

here—RD#/WR#

strobes are not

active)

48 kbytes

External

Data

Memory

(RD#,WR#)

56 kbytes

External

Code

Memory

(PSEN#)

1FFF

(Ok to populate

data memory

here—RD#/WR#

strobes are not

active)

(OK to populate

program

memory here—

PSEN# strobe

is not active)

Eight kbytes RAM

Code and Data

(PSEN#,RD#,WR#)*

0000

Data

Code

*SUDPTR, USB upload/download, I

2

C-compatible interface boot access

Figure 3-1. Internal Code Memory, EA = 0

Document #: 38-08012 Rev. *B

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