三合微科股�½有限公司
S
AM
H
OP
Microelectronics Corp.
SM3501
FAN CONTROLLER
PIN FUNCTION
No.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
Pin Name
LOW
TGO
BUZ
OSC1
OSC2
OPTION1
VDD
SPEED
TGI
OFF/ON-OFF
TIMER
MODE
COM1
COM2
VSS
OPTION2
STR
MID
I/O
O
O
O
I
O
I
POWER
I/O
I/O
I/O
I/O
I/O
O
O
POWER
I
O
O
Function
Wind speed control output
Toggle output
Trigger output to drive piezo
Crystal input
Crystal output
Fan start-up option-float: Speed, VDD:ON/OFF
Positive power
Wind grade selection input and LED output
Toggle output control input and LED output
ON-OFF or OFF function control input and LED output
Timer setting input and LED output
Wind mode selection input and LED output
LED scanning common pin
LED scanning common pin
Negative power supply
Timer mode option-float: nonadder, VSS: adder
Wind speed control output
Wind speed control output
Page 2
V.2.0 Mar 8,2002
SAMHOP [ SAMHOP MICROELECTRONICS CORP. ]
