R

V3023

Copyright © 2004, EM Microelectronic-Marin SA

4

www.emmicroelectronic.com

Timing Characteristics (standard temperature range)

Parameter

Symbol

Test Conditions

Min.

Typ.

Max.

Unit

Chip select duration, write cycle

50

ns

Write pulse duration

50

ns

Time between two transfers

100

ns

RAM access time (note 1)

50

60

ns

Data valid to Hi-impedance (note 2)

10

30

40

ns

Write data settle time (note 3)

50

ns

Data hold time (note 4)

10

ns

Advance write time

10

ns

PF

response delay

100

ns

Rise time (all timing waveform

signals)

200

ns

Fall time (all timing waveform

signals)

200

ns

CS

delay after A /D (note 5)

5

ns

CS

delay to A /D

10

ns

Table 4

Note 1

Note 2

Note 3

Note 4

Note 5

: A /D must come before a CS and RD or a CS and WR combination. The user has to guarantee this.

Timing Waveforms

Read Timing for Intel ( RD and WR Pulse) and Motorola ( DS or RD pin tied to CS and R/ W )

Fig. 6a