30

COMMERCIALTEMPERATURERANGE

256 x 36 x 2, 512 x 36 x 2, 1,024 x 36 x 2

Figure 25. Timing for

Figure 23. Timing for

Figure 24. Timing for

NOTES:

AEB to transition HIGH in the next CLKB cycle. If the time between the rising CLKA edge and rising

AEB may transition HIGH one CLKB cycle later than shown.

2. FIFO1 Write (

CSA = LOW, W/RA = LOW, MBA = LOW), FIFO1 read (CSB = LOW, W/RB = HIGH, MBB = LOW). Data in the FIFO1 output register has been read from the FIFO.

3. If Port B size is word or byte,

AEB is set LOW by the last word or byte read from FIFO1, respectively.

NOTES:

AEA to transition HIGH in the next CLKA cycle. If the time between the rising CLKB edge and rising

AEA may transition HIGH one CLKA cycle later than shown.

2. FIFO2 Write (

CSB = LOW, W/RB = LOW, MBB = LOW), FIFO2 read (CSA = LOW, W/RA = LOW, MBA = LOW). Data in the FIFO2 output register has been read from the FIFO.

NOTES:

AFA to transition HIGH in the next CLKA cycle. If the time between the rising CLKA edge and rising

AFA may transition HIGH one CLKA cycle later than shown.

2. FIFO1 Write (

CSA = LOW, W/RA = HIGH, MBA = LOW), FIFO1 read (CSB = LOW, W/RB = HIGH, MBB = LOW). Data in the FIFO1 output register has been read from the FIFO.

3. D = Maximum FIFO Depth = 256 for the IDT72V3624, 512 for the IDT72V3634, 1,024 for the IDT72V3644.

AEB

CLKA

ENB

4664 drw25

ENA

CLKB

2

1

X1 Words in FIFO1

(X1+1) Words in FIFO1

(1)

AEA

CLKB

ENA

4664 drw26

ENB

CLKA

2

1

(X2+1) Words in FIFO2

X2 Words in FIFO2

(1)

AFA

CLKA

ENB

4664 drw27

ENA

CLKB

12

[D-(Y1+1)] Words in FIFO1

(D-Y1) Words in FIFO1

(1)