SyncMOS Technologies Inc.
SM2958
August 2000
8 - Bit Micro-controller
with 32KB flash embedded
Product List
SM2958C16, 16 MHz 8KB internal memory MCU
SM2958C25, 25 MHz 8KB internal memory MCU
SM2958C40, 40 MHz 8KB internal memory MCU
Features
Description
Working voltage:4.5V through 5.5V
General 8052 family compatible
12 clocks per machine cycle
32 KB internal flash memory
256 bytes data RAM
Three16 bit timers/counters
Four 8-bit I/O ports
Full duplex serial channel
Bit operation instruction
Page free jumps
8-bit unsigned division
8-bit unsigned multiply
BCD arithmetic
Direct addressing
Indirect addressing
Nested interrupt
Two priority level interrupt
A serial I/O port
Power save modes:
Idle mode and power down mode
Code protection function
The SM2958 product is an 8 - bit single chip micro controller with 32 KB flash embedded. It provides hardware
features and a powerful instruction set, necessary to make
it a versatile and cost effective controller for those
applications demand up to 32 I/O pins or need up to 32 KB
flash memory either for program or for data or mixed.
To program the flash block, a commercial programmer
is capable to do it.
Ordering Information
yyww
SM2958ihhk
yy: year, ww:week
v: version identifier { , A, B, ...}
i: process identifier {C}
hh: working clock in MHz {16, 25, 40}
k: package type postfix {as below table}
Postfix
P
J
Q
Package
40L PDIP
44L PLCC
44L QFP
Pin/Pad
Configuration
page 2
page 2
page 2
Dimension
page 11
page 12
page 13
Taiwan
4F, No. 1 Creation Road 1,
Science-based Industrial Park,
Hsinchu, Taiwan 30077
TEL: 886-3-579-2926
886-3-579-2988
FAX: 886-3-579-2960
886-3-578-0493
Specifications subject to change without notice,contact your sales representatives for the most recent information.
1/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
6
P1.5
7
P1.6
P1.7
RES
RXD/P3.0
NC
TXD/P3.1
#INT0/P3.2
#INT1/P3.3
T0/P3.4
T1/P3.5
8
5
4
3
1 44 43 42 41 40
2
39
P0.4/AD4
38
P0.5/AD5
P0.6/AD6
37
9
SM2958 ihhJ
10
11
36
P0.7/AD7
35
33
#EA/VPP
NC
ALE
32
#PSEN
31
30
P2.7/A15
P2.6/A14
29
P2.5/A13
44L PLCC
12
13
34
(Top View)
14
15
16
17
18 19 20 21 22 23 24 25 26 27 28
P1.5
P1.6
1
2
P0.1/AD1
P0.2/AD2
P0.3/AD3
P0.0/AD0
NC
VDD
T2EX/P1.1
T2/P1.0
P1.3
P1.2
P1.4
P0.3/AD3
P0.2/AD2
T2EX/P1.1
T2/P1.0
NC
VDD
P0.0/AD0
P0.1/AD1
P1.3
P1.2
P1.4
Pin Configurations
44 43 42 41 40 39 38 37 36 35 34
33
32
P1.5
RES
RXD/P3.0
3
NC
TXD/P3.1
#INT0/P3.2
6
8
26
#INT1/P3.3
T0/P3.4
T1/P3.5
9
25
10
24
4
5
7
31
SM2958 ihhQ
30
29
44L QFP
(Top View)
28
27
11
23
P0.4/AD4
P0.5/AD5
P0.6/AD6
P0.7/AD7
#EA/VPP
NC
ALE
#PSEN
P2.7/A15
P2.6/A14
P2.5/A13
T2/P1.0
1
40
VDD
T2EX/P1.1
2
39
P0.0/AD0
P1.2
3
38
P0.1/AD1
37
P0.2/AD2
36
P0.3/AD3
35
P0.4/AD4
34
P0.5/AD5
33
P0.6/AD6
32
P0.7/AD7
31
#EA/VPP
30
ALE
29
#PSEN
28
P2.7/A15
27
P2.6/A14
P1.3
4
5
P1.5
6
P1.6
7
P1.7
8
RES
RXD/P3.0
9
10
TXD/P3.1
11
#INT/P3.2
12
#INT1/P3.3
13
T0/P3.4
14
T1/P3.5
15
26
P2.5/A13
16
25
P2.4/A12
17
24
P2.3/A11
18
23
P2.2/A10
19
22
P2.1/A9
20
21
P2.0/A8
#WR/P3.6
#RD/P3.7
XTAL2
XTAL1
VSS
SM2958 ihhP
40L PDIP
(Top View)
P1.4
P2.4/A12
P2.3/A11
P2.1/A9
P2.2/A10
NC
P2.0/A8
#WR/P3.6
#RD/P3.7
XTAL2
XTAL1
VSS
P2.4/A12
P2.3/A11
P2.1/A9
P2.2/A10
NC
P2.0/A8
#RD/P3.7
XTAL2
XTAL1
VSS
#WR/P3.6
12 13 14 15 16 17 18 19 20 21 22
Specifications subject to change without notice,contact your sales representatives for the most recent information.
2/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
Block Diagram
Timer 1
Timer 2
Timer 0
256
bytes RAM
Decoder &
Register
Stack
Pointer
Buffer
RES
Reset
Circuit
Vdd
Vss
Power
Circuit
to pertinent blocks
PC
Incrementer
to whole chip
Buffer2
Interrupt
Circuit
to pertinent blocks
XTAL1
#EA
ALE
Buffer1
Program
Counter
ALU
Register
PSW
XTAL2
#PSEN
DPTR
Acc
to whole system
Timing
Generator
Instruction
Register
32K
bytes
Port 0
Latch
Port 0
Driver & Mux
8
Port 1
Latch
Port 2
Latch
Port 3
Latch
Flash
Memory
Port 1
Port 2
Port 3
Driver & Mux Driver & Mux Driver & Mux
8
8
8
Specifications subject to change without notice,contact your sales representatives for the most recent information.
3/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
Pin Descriptions
40L
PDIP
Pin#
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
44L 44L
QFP PLCC
Symbol
Pin# Pin#
40
2
T2/P1.0
41
3
T2EX/P1.1
42
4
P1.2
43
5
P1.3
44
6
P1.4
1
7
P1.5
2
8
P1.6
3
9
P1.7
4
10 RES
5
11
RXD/P3.0
7
13 TXD/P3.1
8
14 #INT0/P3.2
9
15 #INT1/P3.3
10
16 T0/P3.4
11
17 T1/P3.5
12
18 #WR/P3.6
13
19 #RD/P3.7
14
20 XTAL2
15
21 XTAL1
16
22 VSS
18
24 P2.0/A8
19
25 P2.1/A9
20
26 P2.2/A10
21
27 P2.3/A11
22
28 P2.4/A12
23
29 P2.5/A13
24
30 P2.6/A14
25
31 P2.7/A15
26
32 #PSEN
27
33 ALE
29
35 #EA/VPP
30
36 P0.7/AD7
31
37 P0.6/AD6
32
38 P0.5/AD5
33
39 P0.4/AD4
34
40 P0.3/AD3
35
41 P0.2/AD2
36
42 P0.1/AD1
37
43 P0.0/AD0
38
44 VDD
I/O
Names
Active
H
L/ L/ -
L/ L/ -
L
L
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
o
i
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
o
o
i
i/o
i/o
i/o
i/o
i/o
i/o
i/o
i/o
bit 0 of port 1 & timer 2
bit 1 of port 1 & timer control
bit 2 of port 1
bit 3 of port 1
bit 4 of port 1
bit 5 of port 1
bit 6 of port 1
bit 7 of port 1
Reset
bit 0 of port 3 & Receive data
bit 1 of port 3 & Transmit data
bit 2 of port 3 & low true interrupt 0
bit 3 of port 3 & low true interrupt 1
bit 4 of port 3 & Timer 0
bit 5 of port 3 & Timer 1
bit 6 of port 3 & ext. memory write
bit 7 of port 3 & ext. memory read
Crystal out
Crystal in
Sink Voltage, Ground
bit 0 of port 2 & bit 8 of ext. memory address
bit 1 of port 2 & bit 9 of ext. memory address
bit 2 of port 2 & bit 10 of ext. memory address
bit 3 of port 2 & bit 11 of ext. memory address
bit 4 of port 2 & bit 12 of ext. memory address
bit 5 of port 2 & bit 13 of ext. memory address
bit 6 of port 2 & bit 14 of ext. memory address
bit 7 of port 2& bit 15 of ext. memory address
program storage enable
address latch enable
external access & VPP
bit 7 of port 0 & data/address bit 7 of ext. memory
bit 6 of port 0 & data/address bit 6 of ext. memory
bit 5 of port 0 & data/address bit 5 of ext. memory
bit 4 of port 0 & data/address bit 4 of ext. memory
bit 3 of port 0 & data/address bit 3 of ext. memory
bit 2 of port 0 & data/address bit 2 of ext. memory
bit 1 of port 0 & data/address bit 1 of ext. memory
bit 0 of port 0 & data/address bit 0 of ext. memory
Drive Voltage, +5 VCC
Specifications subject to change without notice,contact your sales representatives for the most recent information.
4/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
Operating Conditions
Symbol
Description
TA
Min.
Typ.
Max.
Unit.
Remarks
Ambient temperature under bias
0
25
70
C
VCC5
Supply voltage
4.5
5.0
5.5
V
Fosc 16
Oscillator Frequency
3.0
16
16
MHz
SM2958C16
Fosc 25
3.0
25
25
MHz
SM2958C25
Fosc 40
3.0
40
40
MHz
SM2958C40
SM2958C
DC Characteristics
(12MHz, typical operating conditions, valid for SM2958 series)
Symbol
Parameter
VIL1
VIL2
VIH1
VIH2
VOL1
VOL2
VOH1
Input Low Voltage
Input Low Voltage
Input High Voltage
Input High Voltage
Output Low Voltage
Output Low Voltage
Output High Voltage
port 0,1,2,3,4,#EA
RES, XTAL1
port 0,1,2,3,4,#EA
RES, XTAL1
port 0, ALE, #PSEN
port 1,2,3,4
port 0
Valid
VOH2
Output High Voltage
port 1,2,3,4,ALE,#PSEN
IIL
ITL
ILI
R RES
C IO
I CC
Logical 0 Input Current
Logical Transition Current
Input Leakage Current
Reset Pulldown Resistance
Pin Capacitance
Power Supply Current
port 1,2,3,4
port 1,2,3,4
port 0, #EA
RES
Min.
-0.5
0
2.0
70%Vcc
Max.
0.8
0.8
Vcc+0.5
Vcc+0.5
0.45
0.45
2.4
90%Vcc
2.4
90%Vcc
50
Vdd
-75
-650
+ 10
300
10
20
6.5
150
ICC Active mode test circuit
ICC
Vcc
Vcc
Test Conditions
Unit
V
V
V
V
V
V
V
V
V
V
uA
uA
uA
Kohm
pF
mA
mA
uA
Vcc=5V
“
“
“
IOL=3.2mA
IOL=1.6mA
IOH=-800uA
IOH=-80uA
IOH=-60uA
IOH=-10uA
Vin=0.45V
Vin=2.0V
0.45V<Vin<Vcc
Freq=1MHz, Ta=25 C
Active mode, 12MHz
Idle mode, 12MHz
Power down mode
ICC Idle mode test circuit
ICC
VCC
RST
SM2958
(NC)
Clock Signal
XTAL2
XTAL1
VSS
PO
EA
VCC
RST
8
SM2958
(NC)
Clock Signal
Vcc
PO
EA
8
XTAL2
XTAL1
VSS
Specifications subject to change without notice,contact your sales representatives for the most recent information.
5/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
AC Characteristics
(16/25/40MHz, operating conditions; CL for Port 0, ALE and PSEN Outputs=150pF; 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
63
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
nS
T + 10
nS
5 nS
72
T -10
T + 10 nS
nS
nS
nS
nS
1/fosc
nS
Remarks
Specifications subject to change without notice,contact your sales representatives for the most recent information.
6/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
Application Reference
Valid for SM2958
X'tal
C1
C2
R
3MHz
30 pF
30 pF
open
6MHz
30 pF
30 pF
open
9MHz
30 pF
30 pF
open
12MHz
30 pF
30 pF
open
X'tal
C1
C2
R
16MHz
30 pF
30 pF
open
25MHz
15 pF
15 pF
62KΩ
33MHz
10 pF
10 pF
6.8KΩ
40MHz
5 pF
5 pF
note
XI
X'tal
SM2958
R
X2
C2
C1
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
manufacture for appropriate value of external components.
Please see SM2958 application note for details.
Data Memory Read Cycle Timing
T12
T1
T2
T3
T4
T5
T6
T8
T7
T9
T10
T11
T12
T1
T2
T3
OSC
1
2
ALE
#PSEN
#RD
5
7
3
PORT2
ADDRESS A15 - A8
3
PORT0
INST in Float
A7 - A0
4
Float
8
6
DATA in
Float
ADDRESS
or Float
Specifications subject to change without notice,contact your sales representatives for the most recent information.
7/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
Program Memory Read Cycle Timing
T12
T2
T1
T3
T4
T6
T5
T11
T10
T9
T8
T7
T1
T12
T2
OSC
ALE
1
2
5
#PSEN
7
#RD,#WR
3
PORT2
ADDRESS A15 - A8
3
PORT0
Float
4
A7 - A0
ADDRESS A15 - A8
6
Float
8
Float
INST in
A7 - A0
Float
Float
INST in
Data Memory Write Cycle Timing
T12
T1
T2
T4
T3
T5
T6
T8
T7
T9
T10
T11
T12
T1
T2
T3
OSC
1
ALE
#PSEN
#WR
5
6
2
ADDRESS A15 - A8
PORT2
2
PORT0
INST
Float
4
3
ADDRESS
or Float
DATA OUT
A7 - A0
Specifications subject to change without notice,contact your sales representatives for the most recent information.
8/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
I/O Ports Timing
T7
T6
T10
T9
T8
X1
T11
T12
T1
T4
T3
T2
T5
T6
T7
T8
sampled
inputs P0,P1
sampled
inputs P2,P3
Output by
Mov Px,Src
current data
next data
RxD at Serial Port
Shift Clock
(Mode 0)
sampled
Timing Critical, Requirement of External Clock (Vss=0.0V is assumed)
TCLCL
Vdd-0.5V
70%Vdd
20%Vdd-0.1V
0.45V
Tm.I
TCHCL
TCLCX
TCHCX
TCLCH
External Program Memory Read Cycle
TPLPH
#PSEN
ALE
PORT 0
TLHLL
TLLPL
TAVLL
TLLAX
TPXIZ
TPLAZ
TPXIX
TPLIV
Instruction. IN
A0 - A7
A0 - A7
TAVIV
PORT 2
A8 - A15
A8 - A15
Specifications subject to change without notice,contact your sales representatives for the most recent information.
9/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
Tm.II
External Data Memory Read Cycle
#PSEN
TYHLH
ALE
TLLDV
TRLRH
TLLYL
#RD
TAVLL
TLLAX
TRHDZ
TRLDV
TRLAZ
TRHDX
A0 - A7
from Ri or DPL
PORT 0
DATA IN
A0 - A7
from PCL
INSTRL
IN
TAVYL
TAVDV
PORT 2
A8 - A15 from PCH
P2.0 - P2.7 or A8 - A15 from DPH
Tm.III External Data Memory Write Cycle
#PSEN
TYHLH
TLHLL
ALE
TLLYL
#WR
TAVLL
TLLAX
PORT 0
TWLWH
TQVWX
TWHQX
TQVWH
A0-A7
from Ri or DPL
DATA OUT
A0-A7
From PCL
INSTRL
IN
TAVYL
PORT 2
A8-A15 from PCH
P2.0-P2.7 or A8-A15 from DPH
Specifications subject to change without notice,contact your sales representatives for the most recent information.
10/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
40L 600mil PDIP Information
E
D
S
E1
A2
A1
C
A
L
e1
B1
eA
B
a
Note:
1. Dimension D Max & include mold flash or tie bar
burrs.
2. Dimension E1 does not include inter lead flash.
3. Dimension D & E1 include mold mismatch and are
determined at the mold parting line.
4. Dimension B1 does not include dam bar protrusion/
infusion.
5. Controlling dimension is inch.
6. General appearance spec. should base on final visual
inspection spec.
Symbol
A
A1
A2
B
B1
C
D
E
E1
e1
L
a
eA
S
Dimension in inch
minimal/maximal
- / 0.210
0.010 / 0.150 / 0.160
0.016 / 0.022
0.048 / 0.054
0.008 / 0.014
- / 2.070
0.590 / 0.610
0.540 / 0.552
0.090 / 0.110
0.120 / 0.140
0 / 15
0.630 / 0.670
- / 0.090
Dimension in mm
minimal/maximal
- / 5.33
0.25 / 3.81 / 4.06
0.41 / 0.56
1.22 / 1.37
0.20 / 0.36
- / 52.58
14.99 / 15.49
13.72 / 14.02
2.29 / 2.79
3.05 / 3.56
0 / 15
16.00 / 17.02
- / 2.29
Specifications subject to change without notice,contact your sales representatives for the most recent information.
11/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
44L Plastic Chip Carrier (PLCC)
L
6
7
E
HE
GE
y
D
A2
HD
A
C
θ
b1
e
b
Symbol
A
A1
A2
b1
b
C
D
E
e
GD
GE
HD
HE
L
θ
GD
Note:
1. Dimension D & E does not include inter lead flash.
2. Dimension b1 does not include dam bar protrusion/
intrusion.
3. Controlling dimension: Inch
4. General appearance spec. should base on final visual
inspection spec.
A1
y
Dimension in inch
minimal/maximal
- / 0.185
0.020 / 0.145 / 0.155
0.026 / 0.032
0.016 / 0.022
0.008 / 0.014
0.648 / 0.658
0.648 / 0.658
0.050 BSC
0.590 / 0.630
0.590 / 0.630
0.680 / 0.700
0.680 / 0.700
0.090 / 0.110
- / 0.004
/
Dimension in mm
minimal/maximal
- / 4.70
0.51 / 3.68 / 3.94
0.66 / 0.81
0.41 / 0.56
0.20 / 0.36
16.46 / 16.71
16.46 / 16.71
1.27 BSC
14.99 / 16.00
14.99 / 16.00
17.27 / 17.78
17.27 / 17.78
2.29 / 2.79
- / 0.10
/
Specifications subject to change without notice,contact your sales representatives for the most recent information.
12/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
44L Plastic Quad Flat Package
C
L
L1
S
θ2
e
R1
D2 D1 D
Gage Plane
0.25 mm
b
θ3
A2
R2
A1
E2
E1
E
A
e1
seating plane
e
Note:
Dimension D1 and E1 do not include mold protrusion.
Allowance protrusion is 0.25mm per side.
Dimension D1 and E1 do include mold mismatch
and are determined datum plane.
Dimension b does not include dam bar protrusion.
Allowance dam bar protrusion shall be 0.08 mm total
in excess of the b dimension at maximum material
condition. Dam bar cannot be located on the lower
radius or the lead foot.
C
Symbol
A
A1
A2
b
c
D
D1
D2
E
E1
E2
e
L
L1
R1
R2
S
θ
θ1
θ2
θ3
C
Dimension in Inch
minimal/maximal
- / 0.100
0.006 / 0.014
0.071 / 0.087
0.012 / 0.018
0.004 / 0.009
0.520 BSC
0.394 BSC
0.315
0.520 BSC
0.394 BSC
0.315
0.031 BSC
0.029 / 0.041
0.063
0.005 / 0.005 / 0.012
0.008 / 0° / 7°
0° / 10° REF
7° REF
0.004
Dimension in mm
minimal/maximal
- / 2.55
0.15 / 0.35
1.80 / 2.20
0.30 / 0.45
0.09 / 0.20
13.20 BSC
10.00 BSC
8.00
13.20 BSC
10.00 BSC
8.00
0.80 BSC
0.73 / 1.03
1.60
0.13 / 0.13 / 0.30
0.20 / as left
as left
as left
as left
0.10
Specifications subject to change without notice,contact your sales representatives for the most recent information.
13/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
eMCU writer list
Company
Contact info
Tel:02-22182325
Fax:02-22182435
E-mail:
[email protected]
Programmer Model Number
LabTool - 48 ( 1 * 1 )
LabTool - 848 (1*8)
Caprilion
P.O. Box 461 KaoHsiung, Taiwan,
ROC
Web site:
http://www.market.net.tw/ ~ cap/
Tel:07-3865061
Fax:07-3865421
E-mail:
[email protected]
UNIV2000
Hi-Lo
4F, No. 20, 22, LN, 76,
Rui Guang Rd., Nei Hu, Taipei,
Taiwan, ROC.
Web site:
http://www.hilosystems.com.tw
Tel:02-87923301
Fax:02-87923285
E-mai:
[email protected]
All - 11 (1*1)
Gang - 08 (1*8)
Leap
6th F1-4, Lane 609,
Chunghsin Rd., Sec. 5, Sanchung,
Taipei Hsien, Taiwan, ROC
Web site:
http://www.leap.com.tw
Tel:02-29991860
Fax:02-29990015
E-mail:
[email protected]
ChipStation (1*1)
SU - 2000 (1*8)
Xeltek Electronic Co., Ltd
338 Hongwu Road, Nanjing, China
210002
Web site:
http://www.xeltek-cn.com
Tel:+86-25-4408399, 4543153-206
E-mail:
[email protected],
[email protected]
Superpro/2000 (1*1)
Superpro/680 (1*1)
Superpro/280 (1*1)
Superpro/L+(1*1)
Advantech
7F, No.98, Ming-Chung Rd.,
Shin-Tien City, Taipei, Taiwan,
ROC
Web site:
http://www.aec.com.tw
Specifications subject to change without notice,contact your sales representatives for the most recent information.
14/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
Feedback / Inquiry:
To
Attn
Fax
Tel
:
:SyncMOS Technologies, Inc.
:MKT / Customer Service Dept.
:886-3-579-2960
:886-3-578-0493
:886-3-579-2988
:886-3-579-2926
From
Company
:
:
Dept, Section :
Position Title
:
Inquiry Date
:
Ref No
:
Request customer logo as below:
Specifications subject to change without notice,contact your sales representatives for the most recent information.
15/16
Ver 1.0
PID 2958 08/00
SyncMOS Technologies Inc.
SM2958
August 2000
SM2958 Application Note
For normal operation under relatively noisy
environment, it is recommended that:
*Updated 09/00
SM2958
(1) /PSEN signal being connected to VSS
through a pull-low resistor R of value ~ 47Ω
with internal program memory addressing
mode used, and/or
/PSEN
R
~
~ 47Ω
Vcc
(2) ALE signal being connected to VDD through
a pull-high resistor R of value ~ 100Ω with
internal program memory addressing mode
used.
SM2958
R
~
~ 100Ω
ALE
Note: If IC operated under normal environment,
above circuit modification may not needed.
40MHz oscillation circuit,
for general quality crystal and resonator
X1
X’tal
40MHz
SM2958
4.7kΩ
1MΩ
5pF
X2
5pF
Oscillation circuit for very large noise environment.
For example, massage machine which driving
10 DC motors in 6MHz oscillation frequency
p0
X1
SM2958
X’tal
6MHz
p3
M
M
M
M
M
M
M
M
M
8
2
X2
M
Specifications subject to change without notice,contact your sales representatives for the most recent information.
16/16
Ver 1.0
PID 2958 08/00