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AM93LC86ITS Folha de dados(PDF) 9 Page - Anachip Corp

Nome de Peças AM93LC86ITS
Descrição Electrónicos  16384-bits Serial Electrically Erasable PROM
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AM93LC86ITS Folha de dados(HTML) 9 Page - Anachip Corp

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AM93LC86
16384-bits Serial Electrically Erasable PROM
(Preliminary)
Anachip Corp.
www.anachip.com.tw
Rev 0.1 Oct 20, 2003
9/12
Pin Description (Continued)
Chip select (CS)
A high level selects the device. A low level
deselects the device an forces it into standby mode.
However, a programming cycle which is already
initiated will be completed, regardless of the CS
input signal. If CS is brought low during a program
cycle, the device will go into standby mode as soon
as the programming cycle is completed.
Serial clock (SK)
The serial clock is used to synchronize the
communication between a master device and the
AM93LC86. Opcode, address, and data bits are
clocked in on the positive edge of SK. Data bits are
also clocked out on the positive edge of SK.
SK can be stopped anywhere in the transmission
sequence (at high or low level) and can be
continued anytime with respect to clock high time
(TCKH) and clock low time (TCKL). This gives the
controlling master freedom in preparing opcode,
address, and data.
SK is a “don’t care” if CS is low (device deselected).
If CS is high, but START condition has not been
detected, any number of clock cycles can be
recevived by the device without changing its status
(i.e., waiting for START condition).
SK cycles are not required during the self-timed
WRITE (i.e., auto ERASE/WRITE) cycles.
After detection of a start condition the specified
number of clock cycles (respectively low to high
transitions of SK) must be provided. These clock
cycles are required to clock in all opcode, address,
and data bits before an instruction is executed (see
the table of instruction set). SK and DI then become
don’t care inputs waiting for a new start condition to
be detected.
Note:
CS must go low between consecutive instructions,
except when performing a sequential read.
Data input (DI)
Data input is used to clock in a start bit, opcode,
address, and data synchronously with the CLK
input.
Data output (DO)
Data output is used in the READ mode to output
data synchronously with the CLK input( TPD after
the positive edge of CLK)
Write protection ( WP )
This pin allows the user to enable or disable the
ability to write data to the memory array. If the WP
pin is floated or tied to VCC, the device can be
programmed. If the WP pin is tied to GND,
programming will be inhibited. There is an internal
pull-up on this device that enables programming if
this pin is left floating.
Organization (ORG)
When ORG is connected to VCC, the X16 memory
organization is selected. When ORG is tied to GND,
the X8 memory organization is selected. There is
an internal pull-up resistor on the ORG pin that will
select X16 organization when left unconnected.


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