21
COMMERCIALTEMPERATURERANGE
IDT72V3624/72V3634/72V3644 3.3V CMOS SyncBiFIFOTM WITH BUS-MATCHING
256 x 36 x 2, 512 x 36 x 2, 1,024 x 36 x 2
SIZE MODE(1)
DATA WRITTEN TO FIFO1
READ NO.
DATA READ FROM FIFO1
BM
SIZE
BE
A35-A27
A26-A18
A17-A9
A8-A0
B17-B9
B8-B0
HL
H
A
B
C
D
1
A
B
2C
D
HL
L
A
B
C
D
1
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
L
X
A
BC
DA
BC
D
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 drw13
CLKB
EFB/ORB
ENB
MBB
CSB
W/RB
tCLK
tCLKH
tCLKL
tA
tMDV
tEN
tA
tENH
W1
W2
W3
(1)
tENH
tDIS
No Operation
B0-B35
(FWFT Mode)
tEN
W2
(1)
tDIS
W1
Previous Data
B0-B35
(Standard Mode)
tMDV
tA
OR
tA
HIGH
tENS2
(1)
CLKB
ENB
EFB/ORB
W/RB
CSB
HIGH
4664 drw14
B0-B17
(Standard Mode)
B0-B17
(FWFT Mode)
OR
Previous Data
tA
tENS2
tENH
No Operation
Read 1
tA
tA
Read 1
Read 2
Read 3
MBB
tEN
tMDV
tEN
tMDV
tDIS