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MR27V6466F Datasheet(PDF) 4 Page - OKI electronic componets

Part No. MR27V6466F
Description  4,194,304-Word x 16Bit or 2,097,152-Word x 32-Bit Synchronous One Time PROM
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Maker  OKI [OKI electronic componets]
Homepage  http://www.oki.com
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MR27V6466F Datasheet(HTML) 4 Page - OKI electronic componets

 
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PEDR27V6466F-01-08
1Semiconductor
MR27V6466F
4/39
PIN FUNCTION FOR SYNCHRONOUS READ OPERATION
(STO pin is low level or open)
Pin Name
Function
Description
STO
Static Operation
Must be low for synchronous operation. Internal resistance
(around 10k ohms) pulls the input level down to V
SS when this
pin is open. High level STO enables programming operation
compatible with standard OTPs.
CLK
System Clock
All inputs are sampled at the rising edge.
CS
Chip Select
Enables command sampling by the CLK signal with a low level
on the CS input.
CKE
Clock Enable
Masks internal system clock to freeze the CLK operation of
subsequent CLK cycle. CKE must be enabled for command
sampling cycles. CLK is disabled for two types of operations.
1) Clock Suspend
2) Power Down
A0 to A12
Address
Row and column addresses are multiplexed on the same pins.
Row address: RA0 to RA12
Column address: CA0 to CA7 (x32) /CA0 to CA8 (x16)
LSB:CA0(Both x32 and x16)
RAS
Row Address Strobe
CAS
Column Address Strobe
MR
Mode Register Set
Functionality depends on the combination.
See the function table.
DQ0 to DQ31 Data Output
Data outputs are valid at the rising edge of CLK for read
cycles. Except for read cycles DQn is high-Z state.
DQM
Data Output Masking
Data outputs are masked after two cycles from when high level
DQM is applied.
WORD
x32/x16 Organization Selection
The WORD pin defines the organization of each read
command to be x16 (word mode) or x32 (double word mode).
High = x32
Low = x16
When WORD is low (x16,word mode) ,DQ16 to DQ31 are
held on High-Z state.
V
CC
Power Supply
3.3 V Power supply
V
SS
Ground
V
CCQ
Data Output Power Supply
3.3 V Power supply to DQ0-DQ31
V
SSQ
Data Output Ground
NC
No Connection
DC
Don't Care
Logical input level is ignored.


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