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ACE25C512 Datasheet(PDF) 5 Page - ACE Technology Co., LTD.

No. de pieza ACE25C512
Descripción Electrónicos  512K-BIT Serial Flash Memory
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Fabricante Electrónico  ACE [ACE Technology Co., LTD.]
Página de inicio  http://www.ace-ele.com
Logo ACE - ACE Technology Co., LTD.

ACE25C512 Datasheet(HTML) 5 Page - ACE Technology Co., LTD.

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ACE25C512
512K-BIT Serial Flash Memory
VER 1.2
5
1
001000h
001FFFh
0
000000h
003FFFh
Block (32KB)
Sector (4KB)
Address Range
1
15
00F000h
00FFFFh
.
.
.
.
.
.
9
009000h
009FFFh
8
008000h
008FFFh
0
7
007000h
007FFFh
.
.
.
.
.
.
1
001000h
001FFFh
0
000000h
003FFFh
Table 1 Memory organization
Device Operations
Standard SPI
The ACE25C512 is accessed through an SPI compatible bus consisting of four signals: Serial Clock
(CLK), Chip Select (CS#), Serial Data Input (DI) and Serial Data Output (DO). Standard SPI
instructions use the DI input pin to serially write instructions, addresses or data to the device on the
rising edge of CLK. The DO output pin is used to read data or status from the device on the falling
edge of CLK.
SPI bus operation Mode 0 (0,0) and 3 (1,1) are supported. The primary difference betwe en Mode 0
and Mode 3 concerns the normal state of the CLK signal when the SPI bus master is in standby and
data is not being transferred to the Serial Flash. For Mode 0, the CLK signal is normally low on the
falling and rising edges of CS#. For Mode 3, the CLK signal is normally high on the falling and rising
edges of CS#.
Figure 2 The difference between Mode 0 and Mode 3
Dual SPI
The ACE25C512
supports Dual SPI operation when using instructions such as “Fast Read Dual
Output (3Bh)” and “Fast Read Dual I/O (BBh)”. These instructions allow data to be transferred to or
from the device at two to three times the rate of ordinary Serial Flash devices. The Dual SPI Read
instructions are ideal for quickly downloading code to RAM upon power -up (code-shadowing) or for
executing non-speed- critical code directly from the SPI bus (XIP). When using Dual SPI instructions,


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