22
COMMERCIAL TEMPERATURE RANGE
IDT72V3664 3.3V CMOS SyncBiFIFO
TM
WITH BUS-MATCHING
4,096 x 36 x 2
SIZE MODE
(1)
DATA WRITTEN TO FIFO1 READ DATA READ FROM FIFO1
NO.
BM SIZE BE A35-A27 A26-A18 A17-A9 A8-A0 B17-B9 B8-B0
HLH A B C D1 A B
2C D
HLL A B C D1 C D
2A B
DATA SIZE TABLE FOR WORD READS FROM FIFO1
Figure 12. Port-B Word Read Cycle Timing for FIFO1 (IDT Standard and FWFT Modes)
NOTE:
1. BE is selected at Master Reset; BM and SIZE must be static throughout device operation .
SIZE MODE
(1)
DATA WRITTEN TO FIFO1 DATA READ FROM FIFO1
BM SIZE BE A35-A27 A26-A18 A17-A9 A8-A0 B35-B27 B26-B18 B17-B9 B8-B0
LXXA B CDABCD
NOTE:
1. Read From FIFO1.
DATA SIZE TABLE FOR FIFO LONG-WORD READS FROM FIFO1
Figure 11. Port B Long-Word Read Cycle Timing for FIFO1 (IDT Standard and FWFT Modes)
NOTE:
1. Unused word B18-B35 are indeterminate for word-size reads.
NOTE:
1. BE is selected at Master Reset; BM and SIZE must be static throughout device operation .
4664 drw 13
CLKB
EFB/ORB
ENB
MBB
CSB
W/RB
t
CLK
t
CLKH
t
CLKL
t
ENS2
t
A
t
MDV
t
EN
t
A
t
ENS2
t
ENH
t
ENS2
t
ENH
W1
W2 W3
(1)
(1)
t
ENH
t
DIS
No Operation
B0-B35
(FWFT Mode)
t
EN
W2
t
DIS
W1
Previous Data
B0-B35
(Standard Mode)
t
MDV
t
A
OR
t
A
HIGH
(1)(1)
(1)
CLKB
ENB
EFB/ORB
W/RB
CSB
HIGH
4664 drw 14
B0-B17
(Standard Mode)
B0-B17
(FWFT Mode)
OR
Previous Data
t
DIS
t
A
t
A
t
ENS2
t
ENH
No Operation
Read 1
t
A
t
A
Read 1
Read 2
Read 2
Read 3
t
DIS
MBB
t
EN
t
MDV
t
EN
t
MDV
