Data Sheet

fido5100/fido5200

SPECIFICATIONS

analog.com

Rev. G | 5 of 21

Table 2. Nonmultiplexed Address Data Bus—Read and Write Cycle Timing1, 2, 3 (Continued)

Parameter

Min

Typ

Max

Unit

Description

tDH

30

ps

Input data hold after WE high

1 The MBS pin determines whether the host interfaced has multiplexed or separate address and data lines. When MBS = 0, the interface is nonmultiplexed.

2 OE can be taken low before CS. Therefore, tEOE can be a negative value. In this case, a board designer must closely monitor tDO and tCDV to avoid bus contention and

ensure proper data transfer.

3 The read bus cycle terminates when either CS or OE is taken high. Therefore, a negative value for tCOE is acceptable in some circumstances.

Timing Diagrams, Nonmultiplexed REM Switch

Figure 2. REM Switch Nonmultiplexed Address and Data Bus Read Timing, MBS = 0

Figure 3. REM Switch Nonmultiplexed Address and Data Bus Write Timing, MBS = 0

TIMING SPECIFICATIONS—MULTIPLEXED ADDRESS DATA BUS

Table 3. Multiplexed Address Data Bus—Read and Write Cycle Timing1

Parameter

Min

Typ

Max

Unit

Description

tALEH

8

ns

ALE high time

tALEL

16

ns

ALE low time

tAS

170

ps

Address setup time

tAH

170

ps

Address hold time

tCDV

20

ns

ALE to valid data

tALOE

2

ns

ALE to output enable

tODV

20

ns

Output enable to data valid

tDHZ

150

ps

Output disable to high-Z time

tCHZ

150

ps

CS high to high-Z time

tCLLL

0

ns

CS low to ALE low

tCSH

8

ns

CS high time