8-9

MS622424

MOSEL VITELIC

MS622424 Rev. 1.0 January 1995

Timing Waveforms of MPU Cycle

4

9

CEB1

CEB2

R/WB

CONFIGSEL0–2

CONFIGBUS0–7

CONFIGBUS0–7

(Read Cycle)

AFB, FFB

7

5

2

1

8

6

3

AC Characteristics

At recommended operating conditions, unless otherwise noted.

Symbol

Parameter

Min.

Typ.

Max.

Unit

Notes

1

CEB Cycle Time

80

ns

2

CEB Pulse Width

65

ns

3

CONFIGSEL/BUS and R/WB Set-up before CEB low

0

ns

4

CONFIGSEL/BUS and R/WBHold after CEB low

10

ns

5

CONFIGBUS Data Access

65

ns

6

CONFIGBUS Data Hold

5

ns

7

CEB low to CONFIGBUS Lo-Z

10

ns

2, 3

8

CEB high to CONFIGBUS Hi-Z

10

ns

2, 3

9

Write cycle start to AFB, FFB low

65

ns

NOTES:

1. Applicable to all speed grades.

2. This parameter is sampled and not 100% tested.

3. Transition is measured ± 500mV from low or high voltage with load (see Figure 2).