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ACE93C66FM+UH Datenblatt(PDF) 7 Page - ACE Technology Co., LTD.

Teilenummer ACE93C66FM+UH
Bauteilbeschribung  Three-wire Serial EEPROM
Download  14 Pages
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Hersteller  ACE [ACE Technology Co., LTD.]
Direct Link  http://www.ace-ele.com
Logo ACE - ACE Technology Co., LTD.

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ACE93C46.56.66
Three-wire Serial EEPROM
VER 1.5
7
Instruction Set for the ACE93C56/66
Instruction
SB
OP
Code
Address
Data
Comments
*8
*16
*8
*16
READ
1
10
A8-A0
A7-A0
Read data stored in memory,
at specified address
EWEN
1
00
11XXXXXX
11XXXXXX
Write enable must precede all
programming modes
REASE
1
11
A8-A0
A7-A0
Erase memory location
An-A0
WRITE
1
01
A8-A0
A7-A0
D7-D0 D15-D0
Writes memory location
An-A0
ERAL
1
00
10XXXXXXX
10XXXXXX
Erases all memory locations.
Valid only at VCC=4.5V to
5.5V
WRAL
1
00
01XXXXXXX
01XXXXXX
D7-D0 D15-D0
Writes all memory locations.
Valid only at VCC=4.5V to
5.5V
EWDS
1
00
00XXXXXXX
00XXXXXX
Disables all programming
instructions
Notes: The X
’s in the address field represent don’t care values and must be clocked.
READ (READ):
The Read (READ) instruction contains the address code for the memory location to be read. After the instruction and
address are decoded, data from the selected memory location is available at the serial output pin DO. Output data
changes are synchronized with the rising edges of serial clock SK. It should be noted that a dummy bit
(logic “0”)
precedes the 8- or 16-bit data output string. The ACE93C56/66 supports sequential read operations. The device will
automatically increment the internal address pointer and clock out the next memory location as long as Chip Select (CS)
is held high .In this case ,the dummy bit (logic “0”)will not be clocked out between memory locations, thus allowing for a
continuous steam of data to be read.
ERASE/WRITE (EWEN):
To assure data integrity, the part automatically goes into the Erase/Write Disable (EWDS) state when power is first
applied. An Erase/Write Enable(EWEN) instruction must be executed first before any programming instructions can be
carried out. Please note that once in the EWEN state, programming remains enabled until an EWDS instruction is
executed or VCC power is removed from the part.
ERASE (ERASE):
The Erase (ERASE) instruction programs all bits in the specified memory location to the logical “1” state. The
self-timed erase cycle starts once the ERASE instruction and address are decoded. The DO pin outputs the
Ready/Busy status of the part if CS
is brought high after being kept low for a minimum of 250 ns (TCS). A logic “1” at pin
DO indicates that the selected memory location has been erased, and the part is ready for another instruction.


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