FM22L16
Functional Truth Table 1,2
/CE
X
H
↓
L
L
↓
L
L
↑
/WE
X
X
H
H
H
L
↓
↓
X
A(17:2)
A(1:0)
/ZZ
L
H
H
H
H
H
H
H
Operation
Sleep Mode
Standby/Idle
Read
Page Mode Read
Random Read
/CE-Controlled Write
/WE-Controlled Write 2
Page Mode Write 3
Starts Precharge
X
X
V
X
X
V
No Change
Change
Change
V
V
V
V
X
V
V
No Change
X
H
Notes:
1) H=Logic High, L=Logic Low, V=Valid Data, X=Don’t Care.
2) /WE-controlled write cycle begins as a Read cycle.
3) Addresses A(1:0) must remain stable for at least 10 ns during page mode operation.
4) For write cycles, data-in is latched on the rising edge of /CE or /WE, whichever comes first.
Byte Select Truth Table
/OE
H
X
/LB
X
H
H
L
/UB
X
H
L
H
L
Operation
Read; Outputs Disabled
L
Read; DQ(7:0) Hi-Z
Read; DQ(15:8) Hi-Z
Read
L
X
H
L
L
L
H
L
Write; Mask DQ(7:0)
Write; Mask DQ(15:8)
Write
Simplified Sleep/Standby State Diagram
Rev. 1.0
Mar. 2007
Page 3 of 15
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