26

COMMERCIALTEMPERATURERANGE

BUS-MATCHING 2,048 x 36, 4,096 x 36, and 8,192 x 36

Figure 18. Timing for Mail2 Register and MBF2

MBF2

MBF2

MBF2

MBF2 Flag (IDT Standard and FWFT Modes)

NOTE:

1. If Port B is configured for word size, data can be written to the Mail2 Register using B0-B17 (B18-B35 are don't care inputs). In this first case A0-A17 will have valid data (A18-A35 will

be indeterminate). If Port B is configured for byte size, data can be written to the Mail2 Register using B0-B8 (B9-B35 are don't care inputs). In this second case, A0-A8 will have valid

data (A9-A35 will be indeterminate).

4662 drw20

CLKB

ENB

B0-B35

MBB

CSB

W/RB

CLKA

MBF2

CSA

MBA

ENA

A0-A35

W/

RA

FIFO Output Register

W1 (Remains valid in Mail2 Register after read)

W1