參數(shù)資料
型號: 93LC66A-SM
廠商: Microchip Technology Inc.
英文描述: 4K 2.5V Microwire Serial EEPROM
中文描述: 4K的2.5V的微型導(dǎo)線串行EEPROM
文件頁數(shù): 23/24頁
文件大?。?/td> 405K
代理商: 93LC66A-SM
93AA66A/B/C, 93LC66A/B/C, 93C66A/B/C
DS21795B-page 8
2003 Microchip Technology Inc.
2.6
ERASE/WRITE DISABLE And ENABLE (EWDS/EWEN)
The 93XX66A/B/C powers up in the ERASE/WRITE
Disable (EWDS) state. All Programming modes must be
preceded by an ERASE/WRITE Enable (EWEN) instruc-
tion. Once the EWEN instruction is executed, program-
ming remains enabled until an EWDS instruction is
executed or Vcc is removed from the device.
To protect against accidental data disturbance, the
EWDS
instruction can be used to disable all ERASE/
WRITE functions and should follow all programming
operations. Execution of a READ instruction is indepen-
dent of both the EWEN and EWDS instructions.
FIGURE 2-5:
EWDS TIMING
FIGURE 2-6:
EWEN TIMING
2.7
READ
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. The output data bits will toggle on
the rising edge of the CLK and are stable after the
specified time delay (TPD). Sequential read is possible
when CS is held high. The memory data will automati-
cally cycle to the next register and output sequentially.
FIGURE 2-7:
READ TIMING
CS
CLK
DI
10
00
0
X
X
TCSL
1X
CS
CLK
DI
00
1
X
TCSL
CS
CLK
DI
DO
11
0
An
A0
HIGH-Z
0Dx
D0
Dx
D0
Dx
D0
相關(guān)PDF資料
PDF描述
93LC66A-SN 4K 2.5V Microwire Serial EEPROM
93LC66A-ST 4K 2.5V Microwire Serial EEPROM
93LC66AB 4K 2.5V Microwire Serial EEPROM
93LC66AEST 4K Microwire Compatible Serial EEPROM
93LC66AIMS 4K Microwire Compatible Serial EEPROM
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