MR27V3266D Ver la hoja de datos (PDF) - Oki Electric Industry
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MR27V3266D Datasheet PDF : 36 Pages
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1 Semiconductor
MR27V3266D
PIN FUNCTION FOR PROGRAMMING OPERATION ( STO pin is high level )
PIN NAME
STO
FUNCTION
Static Operation
AMPX
Address Multiplex
DESCRIPTION
Must be set high for programming operation. Internal
resistance (around 10k ohms) pulls the input level down to
VSS for open state condition to be low level for synchronous
read operation.
When AMPX is low, the addresses are not multiplexed and all
address bits must be supplied to A0-A12(Row Address) and
CAP0-CAP7(Column Address) simultaneously.
This pin should be set low on programming operation.
A0-A12
Address
When AMPX is low, A0-A12 is row address input.
/RAS
Row address strobe
When AMPX is low, input is not used.
/CAS
Column address strobe
When AMPX is low, input is not used.
DQ0-DQ15
/WORD
Data Input/Output
x32/x16 organization Selection
Input of data for programming and output for program verify
and read data.
The /WORD pin defines the organization to be x16(word
mode) or x32(double word mode).
High= x32
Low = x16
Must be set low for programming operation.
CAP0-CAP7
Address Input
When /WORD is low, High-Z state on CAP0-CAP7 is held to
be input pins.
When AMPX is low, CAP0 - CAP7 is column address input.
/OE
/CE
VCC/VSS
VCCQ/VSSQ
VPP
Output Enable
Chip Enable
Power Supply/Ground
Data Output Power/Ground
Program Power Supply
Control signal input for programming.
/OE of conventional OTP.
Control signal input for programming.
Function for programming is associated with conventional
OTP.
Power and ground for the input buffers and the core logic.
Power and ground for output.
High voltage program power is supplied through VPP pin.
When VPP is higher than a predetermined voltage level
between VCC+0.5V and VCC+2V, pin function alters to high
VPP mode. To keep stable static read operation VPP pin must
be kept lower than VCC+0.5V.
The functionality of loose device programming must be studied with the specification of socket adapter that will be
supplied by OKI. MR27V3266D on the socket adapter is the same programming functionality as conventional OTP.
August , 1999
Revision 2.4
32M Synchronous OTP
5
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