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93C56 Datasheet(PDF) 5 Page - STMicroelectronics

No. de Pieza. 93C56
Descripción  2K 128 x 16 or 256 x 8 SERIAL MICROWIRE EEPROM
Descarga  13 Pages
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Fabricante  STMICROELECTRONICS [STMicroelectronics]
Página de inicio  http://www.st.com
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93C56 Datasheet(HTML) 5 Page - STMicroelectronics

 
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Figure 5. Synchronous Timing, Read or Write
AI00820C
C
D
Q
ADDRESS INPUT
Hi-Z
tDVCH
tCLSL
A0
S
DATA OUTPUT
tCHQV
tCHDX
tCHQL
An
tSLSH
tSLQZ
Q15/Q7
Q0
AI01429
C
D
Q
ADDRESS/DATA INPUT
Hi-Z
tDVCH
tSLCH
A0/D0
S
WRITE CYCLE
tSLSH
tCHDX
An
tCLSL
tSLQZ
BUSY
tSHQV
tW
READY
MEMORY ORGANIZATION
The ST93C56 is organized as 256 bytes x 8 bits or
128 words x 16 bits. If the ORG input is left uncon-
nected (or connected to VCC) the x16 organization
is selected, when ORG is connected to Ground
(VSS) the x8 organization is selected. When the
ST93C56 is in standby mode, the ORG input
should be unconnected or set to either VSS or VCC
in order to achieve the minimum power consump-
tion. Any voltage between VSS and VCC applied to
ORG may increase the standby current value.
POWER-ON DATA PROTECTION
In order to prevent data corruption and inadvertent
write operations during power up, a Power On
Reset (POR) circuit resets all internal programming
circuitry and sets the device in the Write Disable
mode. When VCC reaches its functional value, the
device is properly reset (in the Write Disable mode)
and is ready to decode and execute an incoming
instruction. A stable VCC must be applied, before
applying any logic signal.
5/13
ST93C56/56C, ST93C57C


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