May 2001

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

8/16

Ver 1.1

SM8051/8052 07/2005

SyncMOS Technologies Inc.

SM8051/80952

Symbol

Parameter

Valid

Cycle

fosc=16MHz

Min. Typ. Max

Variable fosc

Min.

Typ.

Max

Unit

Remarks

T LHLL

ALE pulse width

RD/WRT

115

2xT - 10

nS

T AVLL

Address Valid to ALE low

RD/WRT

43

T - 20

nS

T LLAX

Address Hold after ALE low

RD/WRT

53

T - 10

nS

T LLIV

ALE low to Valid Instruction In

RD

240

4xT - 10

nS

T LLPL

ALE low to #PSEN low

RD

53

T - 10

nS

T PLPH

#PSEN pulse width

RD

173

3xT - 15

nS

T PLIV

#PSEN low to Valid Instruction In

RD

177

3xT - 10

nS

T PXIX

Instruction Hold after #PSEN

RD

0

0

nS

T PXIZ

Instruction Float after #PSEN

RD

87

T + 25

nS

T AVIV

Address to Valid Instruction In

RD

292

5xT - 20

nS

T PLAZ

#PSEN low to Address Float

RD

10

10

nS

T RLRH

#RD pulse width

RD

365

6xT - 10

nS

T WLWH

#WR pulse width

WRT

365

6xT - 10

nS

T RLDV

#RD low to Valid Data In

RD

302

5xT - 10

nS

T RHDX

Data Hold after #RD

RD

0

0

nS

T RHDZ

Data Float after #RD

RD

145

2xT + 20

nS

T LLDV

ALE low to Valid Data In

RD

590

8xT - 10

nS

T AVDV

Address to Valid Data In

RD

542

9xT - 20

nS

T LLYL

ALE low to #WR High or #RD low

RD/WRT

178

197 3xT - 10

3xT + 10

nS

T AVYL

Address Valid to #WR or #RD low

RD/WRT

230

4xT - 20

nS

T QVWH

Data Valid to #WR High

WRT

403

7xT - 35

nS

T QVWX

Data Valid to #WR transition

WRT

38

T - 25

nS

T WHQX

Data hold after #WR

WRT

73

T + 10

nS

T RLAZ

#RD low to Address Float

RD

5

nS

T YALH

#WR or #RD high to ALE high

RD/WRT

53

72

T -10

T + 10

nS

T CHCL

clock fall time

nS

T CLCX

clock low time

nS

T CLCH

clock rise time

nS

T CHCX

clock high time

nS

T, TCLCL

clock period

63

1/fosc

nS

AC Characteristics

(25/40MHz, operating conditions; CL for Port 0, ALE and PSEN Outputs=100pF; CL for all Other Output=80pF)

Vcc

RST

XTAL2

XTAL1

VSS

VCC

PO

EA

(NC)

Clock Signal

ICC Idle mode test circuit

SM8051/8052

Vcc

Vcc

RST

XTAL2

XTAL1

VSS

VCC

PO

EA

(NC)

Clock Signal

ICC Active mode test circuit

8

ICC

8

ICC

SM8051/8052