C

D

AI01442

S

Q

A7

2

1

3

4

5

6

7

8

9 10 11 12 13 14 15 16 17 18 19

A6 A5 A4 A3 A2 A1 A0

A8

20 21 22 23

HIGH IMPEDANCE

INSTRUCTION

BYTE ADDRESS

0

7

654

32

0

1

DATA BYTE

Figure 8. Byte Write Operation Sequence

C

D

AI01441

S

Q

2

1

345

67

HIGH IMPEDANCE

0

Figure 7. Write Enable Latch Sequence

Notes:

A8 = A7 = 0 on ST95010; A8 = 0 on ST95020; A8 is only active on ST95040.

7/18

ST95040, ST95020, ST95010