May 2001

Specifications subject to change without notice,contact your sales representatives for the most recent information.

9/16

Ver 1.1

SM8051/8052 07/2005

SyncMOS Technologies Inc.

SM8051/80952

Data Memory Read Cycle Timing

OSC

T12

T1

T2

T3

T4

T5

T6

T7

T8

T9

T10

T11

T12

T1

T2

T3

ALE

1

2

#PSEN

#RD

PORT2

PORT0

5

7

ADDRESS A15 - A8

INST in Float

A7 - A0

3

4

3

Float

6

DATA in

8

Float

ADDRESS

or Float

Application Reference

X'tal

3MHz

6MHz

9MHz

12MHz

C1

30 pF

30 pF

30 pF

30 pF

C2

30 pF

30 pF

30 pF

30 pF

R

open

open

open

open

X'tal

16MHz

25MHz

33MHz

40MHz

C1

30 pF

15 pF

10 pF

5 pF

C2

30 pF

15 pF

10 pF

5 pF

R

open

62K

Ω

6.8K

Ω

4.7K

Ω

NOTE: Oscillation circuit may differs with different crystal or ceramic

resonator in higher oscillation frequency which was due to each

crystal or ceramic resonator has its own characteristics.

User should check with the crystal or ceramic resonator manufacturer

for appropriate value of external components.

XI

X2

SM8051/8052

X'tal

R

C1

C2

Valid for SM8051/8052