SyncMOS Technologies Inc.
May 2001
AC Characteristics
(25/40MHz, operating conditions; CL for Port 0, ALE and PSEN Outputs=100pF; CL for all Other Output=80pF)
Symbol
T LHLL
T AVLL
T LLAX
T LLIV
T LLPL
T PLPH
T PLIV
T PXIX
T PXIZ
T AVIV
T PLAZ
T RLRH
T WLWH
T RLDV
T RHDX
T RHDZ
T LLDV
T AVDV
T LLYL
T AVYL
T QVWH
T QVWX
T WHQX
T RLAZ
T YALH
T CHCL
T CLCX
T CLCH
T CHCX
T, TCLCL
Parameter
ALE pulse width
Address Valid to ALE low
Address Hold after ALE low
ALE low to Valid Instruction In
ALE low to #PSEN low
#PSEN pulse width
#PSEN low to Valid Instruction In
Instruction Hold after #PSEN
Instruction Float after #PSEN
Address to Valid Instruction In
#PSEN low to Address Float
#RD pulse width
#WR pulse width
#RD low to Valid Data In
Data Hold after #RD
Data Float after #RD
ALE low to Valid Data In
Address to Valid Data In
ALE low to #WR High or #RD low
Address Valid to #WR or #RD low
Data Valid to #WR High
Data Valid to #WR transition
Data hold after #WR
#RD low to Address Float
#WR or #RD high to ALE high
clock fall time
clock low time
clock rise time
clock high time
clock period
Valid
Cycle
RD/WRT
RD/WRT
RD/WRT
RD
RD
RD
RD
RD
RD
RD
RD
RD
WRT
RD
RD
RD
RD
RD
RD/WRT
RD/WRT
WRT
WRT
WRT
RD
RD/WRT
fosc=16MHz
Min. Typ. Max
115
43
53
240
53
173
177
0
87
292
10
365
365
302
0
145
590
542
178
197
230
403
38
73
53
72
SM8051/80952
Variable fosc
Unit
Min.
Typ.
Max
2xT - 10
nS
T - 20
nS
T - 10
nS
4xT - 10 nS
T - 10
nS
3xT - 15
nS
3xT - 10 nS
0
nS
T + 25 nS
5xT - 20 nS
10 nS
6xT - 10
nS
6xT - 10
nS
5xT - 10 nS
0
nS
2xT + 20 nS
8xT - 10 nS
9xT - 20 nS
3xT - 10
3xT + 10 nS
4xT - 20
nS
7xT - 35
nS
T - 25
T + 10
T -10
5
T + 10
nS
nS
nS
nS
nS
nS
nS
nS
nS
Remarks
63
ICC
VCC
8
Vcc
1/fosc
ICC Idle mode test circuit
ICC Active mode test circuit
Vcc
RST
SM8051/8052
(NC)
Clock Signal
XTAL2
XTAL1
VSS
PO
EA
ICC
VCC
PO
EA
8
Vcc
RST
SM8051/8052
(NC)
Clock Signal
XTAL2
XTAL1
VSS
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 [ SYNCMOS TECHNOLOGIES,INC ]
