IDT723626 Datasheet, PDF(33/35 Page) Integrated Device Technology – CMOS TRIPLE BUS SyncFIFO WITH BUS-MATCHING

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IDT723626 Datasheet, PDF (33/35 Pages) Integrated Device Technology – CMOS TRIPLE BUS SyncFIFO WITH BUS-MATCHING

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IDT723626/723636/723646 CMOS TRIPLE BUS SyncFIFOâ¢

WITH BUS-MATCHING 256 x 36 x 2, 512 x 36 x 2 and 1,024 x 36 x 2

CLKA

CSA

W/RA

MBA

ENA

A0-A35

tENS1

tENS2

tENH

t DS

tDH

COMMERCIAL TEMPERATURE RANGE

CLKB

MBF1

tPMF

CSB

MBB

tENS2

tENH

RENB

tEN

tPMR

tMDV

tDIS

B0-B17

FIFO1 Output Register

W1 (Remains valid in Mail1 Register after read)

NOTE:

3271 drw29

1. If Port B is configured for word size, data can be written to the Mail1 register using A0-A17 (A18-A35 are don't care inputs). In this first case B0-B17 will have valid data. If Port B is configured

for byte size, data can be written to the Mail1 Register using A0-A8 (A9-A35 are don't care inputs). In this second case, B0-B8 will have valid data (B9-B17 will be indeterminate).

Figure 28. Timing for Mail1 Register and MBF1 Flag (IDT Standard and FWFT Modes)

CLKC

MBC

ENC

C0-C17

tENS2

tENH

tENS2

tENH

tDS

tDH

CLKA

MBF2

tPMF

CSA

W/RA

MBA

tENS2

tENH

ENA

A0-A35

tEN

tPMR

tMDV

FIFO2 Output Register

tDIS

W1 (Remains valid in Mail2 Register after read)

NOTE:

3271 drw30

1. If Port C is configured for word size, data can be written to the Mail2 register using C0-C17. In this first case, A18-A35 will have valid data (A0-A17 will be indeterminate). If Port C is configured

for byte size, data can be written to the Mail2 register using C0-C8 (C9-C17 are don't care inputs). In this second case, A18-A26 will have valid data (A0-A17 and A27-A35 will be

indeterminate).

Figure 29. Timing for Mail2 Register and MBF2 Flag (IDT Standard and FWFT Modes)

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