FM23MLD16 Ramtron Corporation, FM23MLD16 Datasheet - Page 3

• Manufacturer Part Number: FM23MLD16
• Description: 8mbit F-ram Memory
• Manufacturer: Ramtron Corporation

Functional Truth Table
Notes:
Byte Select Truth Table
Rev. 1.0
Dec. 2008
1)
2)
3)
4)
/OE
/CE1
H
X
X
L
H
X
L
L
L
L
L
L
L
H=Logic High, L=Logic Low, V=Valid Data, X=Don’t Care.
For write cycles, data-in is latched on the rising edge of /CE1 or /WE of the falling edge of CE2, whichever comes first.
/WE-controlled write cycle begins as a Read cycle and A(18:3) is latched then.
Addresses A(2:0) must remain stable for at least 15 ns during page mode operation.
/LB
X
H
H
H
L
L
L
L
CE2
X
L
H
H
H
H
H
H
H
/UB
X
H
H
H
L
L
L
L
1
/WE
X
X
H
H
H
H
X
X
L
L
Operation
Read; Outputs Disabled
Read; DQ(7:0) Hi-Z
Read; DQ(15:8) Hi-Z
Read
Write; Mask DQ(7:0)
Write; Mask DQ(15:8)
Write
No Change
No Change
A(18:2)
Change
X
X
V
V
V
V
V
X
X
Change
A(1:0)
X
X
V
V
V
V
V
V
V
X
X
Operation
Standby/Idle
Read
Page Mode Read
Random Read
/CE-Controlled Write
/WE-Controlled Write
Page Mode Write
Starts Precharge
FM23MLD16 - 512Kx16 FRAM (multi die)
4
2
2, 3
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