93lc76ct-i-st Microchip Technology Inc., 93lc76ct-i-st Datasheet - Page 8

• Manufacturer Part Number: 93lc76ct-i-st
• Description: 8k Microwire Compatible Serial Eeprom
• Manufacturer: Microchip Technology Inc.

93AA76A/B/C, 93LC76A/B/C, 93C76A/B/C
2.6
The 93XX76A/B/C powers up in the Erase/Write
Disable (EWDS) state. All programming modes must be
preceded by an Erase/Write Enable (EWEN) instruction.
FIGURE 2-3:
FIGURE 2-4:
2.7
The READ instruction outputs the serial data of the
addressed memory location on the DO pin. A dummy
zero bit precedes the 8-bit (If ORG pin is low or A-Version
devices) or 16-bit (If ORG pin is high or B-version
devices) output string.
FIGURE 2-5:
DS21796J-page 8
CLK
CLK
CS
DO
CS
DI
CLK
DI
CS
DI
Erase/Write Disable and Enable
(EWDS/EWEN)
Read
High-Z
1
1
1
EWDS TIMING
EWEN TIMING
READ TIMING
1
0
0
0
0
0
An
0
1
•••
0
A0
1
0
Dx
x
x
•••
Once the EWEN instruction is executed, programming
remains enabled until an EWDS instruction is executed
or V
To protect against accidental data disturbance, the
EWDS instruction can be used to disable all erase/write
functions and should follow all programming opera-
tions. Execution of a READ instruction is independent of
both the EWEN and EWDS instructions.
The output data bits will toggle on the rising edge of the
CLK and are stable after the specified time delay (T
Sequential read is possible when CS is held high. The
memory data will automatically cycle to the next register
and output sequentially.
•••
•••
D0
CC
is removed from the device.
Dx
x
x
•••
T
T
CSL
CSL
D0
© 2007 Microchip Technology Inc.
Dx
•••
D0
PD
).