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93C76B Datasheet(PDF) 9 Page - Microchip Technology

Part # 93C76B
Description  8K Microwire Compatible Serial EEPROM
Download  36 Pages
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Manufacturer  MICROCHIP [Microchip Technology]
Direct Link  http://www.microchip.com
Logo MICROCHIP - Microchip Technology

93C76B Datasheet(HTML) 9 Page - Microchip Technology

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 2003-2012 Microchip Technology Inc.
DS21796M-page 9
93AA76A/B/C, 93LC76A/B/C, 93C76A/B/C
2.9
Write All (WRAL)
The Write All (WRAL) instruction will write the entire
memory array with the data specified in the command.
The self-timed auto-erase and programming cycle is
initiated by the rising edge of CLK on the last data bit.
Clocking of the CLK pin is not necessary after the
device has entered the WRAL cycle. The WRAL
command includes an automatic ERAL cycle for the
device, so the WRAL instruction does not require an
ERAL
instruction. However, the chip must be in the
EWEN status.
The DO pin indicates the Ready/Busy status of the
device if CS is brought high after a minimum of 250 ns
low (TCSL).
VCC must be
4.5V for proper operation of WRAL.
FIGURE 2-7:
WRAL TIMING
Note:
The write sequence requires a logic high
signal on the PE pin prior to the rising
edge of the last data bit.
Note:
After the Write All cycle is complete,
issuing a Start bit and then taking CS low
will clear the Ready/Busy status from DO.
CS
CLK
DI
DO
HIGH-Z
100
01
x
•••
x
Dx
•••
D0
High-Z
Busy
Ready
TWL
TCSL
TSV
TCZ


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