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CAT93C76LE-GT2 Datasheet(PDF) 6 Page - ON Semiconductor

No. de pieza CAT93C76LE-GT2
Descripción Electrónicos  8-Kb Microwire Serial EEPROM
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Fabricante Electrónico  ONSEMI [ON Semiconductor]
Página de inicio  http://www.onsemi.com
Logo ONSEMI - ON Semiconductor

CAT93C76LE-GT2 Datasheet(HTML) 6 Page - ON Semiconductor

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CAT93C76
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6
Erase
Upon receiving an ERASE command and address, the CS
(Chip Select) pin must be deasserted for a minimum of
tCSMIN. The falling edge of CS will start the self clocking
clear cycle of the selected memory location. The clocking of
the SK pin is not necessary after the device has entered the
self clocking mode. The ready/busy status of the CAT93C76
can be determined by selecting the device and polling the
DO pin. Once cleared, the content of a cleared location
returns to a logical “1” state.
Erase/Write Enable and Disable
The CAT93C76 powers up in the write disable state. Any
writing after power-up or after an EWDS (write disable)
instruction must first be preceded by the EWEN (write
enable) instruction. Once the write instruction is enabled, it
will remain enabled until power to the device is removed, or
the EWDS instruction is sent. The EWDS instruction can be
used to disable all CAT93C76 write and clear instructions,
and will prevent any accidental writing or clearing of the
device. Data can be read normally from the device
regardless of the write enable/disable status.
Erase All
Upon receiving an ERAL command, the CS (Chip Select)
pin must be deselected for a minimum of tCSMIN. The falling
edge of CS will start the self clocking clear cycle of all
memory locations in the device. The clocking of the SK pin
is not necessary after the device has entered the self clocking
mode. The ready/busy status of the CAT93C76 can be
determined by selecting the device and polling the DO pin.
Once cleared, the contents of all memory bits return to a
logical “1” state.
Write All
Upon receiving a WRAL command and data, the CS
(Chip Select) pin must be deselected for a minimum of
tCSMIN. The falling edge of CS will start the self clocking
data write to all memory locations in the device. The
clocking of the SK pin is not necessary after the device has
entered the self clocking mode. The ready/busy status of the
CAT93C76 can be determined by selecting the device and
polling the DO pin. It is not necessary for all memory
locations to be cleared before the WRAL command is
executed.
Note 1: After the last data bit has been sampled, Chip Select
(CS) must be brought Low before the next rising edge of the
clock (SK) in order to start the self-timed high voltage cycle.
This is important because if CS is brought low before or after
this specific frame window, the addressed location will not
be programmed or erased.
Power-On Reset (POR)
The CAT93C76 incorporates Power-On Reset (POR)
circuitry which protects the device against malfunctioning
while VCC is lower than the recommended operating
voltage.
The device will power up into a read-only state and will
power-down into a reset state when VCC crosses the POR
level of ~1.3 V.
SK
CS
DI
DO
STANDBY
HIGH−Z
HIGH−Z
1
BUSY
READY
STATUS VERIFY
11
Figure 5. ERASE Instruction Timing
AN
AN−1
A0
tCS
tSV
tHZ
tEW


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