MT8985

2-61

† Timing is over recommended temperature & power supply voltages .

‡ Typical figures are at 25

Figure 17 - Motorola Non-Multiplexed Bus Timing

Voltages are with respect to ground (VSS) unless otherwise stated .

Characteristics

Sym

Min

Max

Units

Test Conditions

1

CS Setup from DS rising

0ns

2R/W Setup from DS rising

30

ns

3

Add setup from DS rising

5ns

4

CS hold after DS falling

0ns

5R/W hold after DS falling

5ns

6

Add hold after DS falling

5ns

7

Data setup from DTA Low on Read

10

ns

8

Data hold on read

10

50

90

ns

9

Data setup on write (fast write)

20

ns

10 Valid Data Delay on write

(slow write)

122

ns

11 Data hold on write

8ns

12 Acknowledgement Delay:

Reading Data Memory

Reading/Writing Conn. Memory

Writing to Control Register

Reading Control Register

560

300/370

47

70

1220

730/800

95

155

ns

ns

ns

ns

13 Acknowledgement Hold Time

10

60

110

ns

CS

R/W

A0-A6

D0-D7

READ

D0-D7

WRITE

DTA

VALID DATA

VALID DATA

2.0V

0.8V

2.0V

0.8V

2.0V

0.8V

2.0V

0.8V

2.0V

0.8V

2.0V

0.8V

2.0V

0.8V

DS