w83l784r Winbond Electronics Corp America, w83l784r Datasheet - Page 56

• Manufacturer Part Number: w83l784r
• Description: Winbond H/w Monitoring Ic
• Manufacturer: Winbond Electronics Corp America

14. W 8 3 L 7 8 4 R S C H E M A T I C S
eg:
TO PIIX4
Rev.
SMARTFAN1 Speed Control Circuit
SMARTFAN2 Speed Control Circuit
PWMOUT1 is
open-drain default.
When 784 is power-down,
Fan5VCC should be turned off.
PWMOUT2 is
open-drain default.
When 784 is power-down,
Fan5VCC should be turned off.
0.1: Ignore.
0.2: W83L784R application circuit.
0.3: Change Pin5,Pin6,Pin11 to LOW Active.
0.4: D1,D2,R9,R15 can be removed.
0.5: Add a pull-up resistor R31.
FANFAULT#
PWR_DN#
PWMOUT1
PWMOUT2
EXTSMI#
THRM#
Fan5VCC
Fan5VCC
(Refer Application Notice 1)
Change Pin7 pull-up to 3VSB.
Change R1 to 0 Ohm. Add R27,R28,R29,R30(Reserved).
R19
R20
3VCC
R23
4.7K
R24
4.7K
R6
4.7K
4.7K
4.7K
3VSB
R7
4.7K
Q4
MOSFET N
Q3
MOSFET N
R12
R18
R11
R17
R27
10K
4.7K
1K
4.7K
1K
VCC
C3
47u
C5
47u
R28
10K
R30
+
+
Q1
3906
Q2
3906
Signal
Power
Signal
Power
GND
GND
10K
FANIN1
FANIN2
PWMOUT1
PWMOUT2
SMI#
OVT#
SCL
SDA
Fan5VCC
Fan5VCC
JP1
HEADER 3
JP2
HEADER 3
3
2
1
3
2
1
1N4148
1N4148
D1
D2
10
1
2
3
4
5
6
7
8
9
U1
FANIN1/GPO1
FANIN2/GPO2
PWMOUT1
PWMOUT2
FANFAULT#/GPO3
PWR_DN#
SMI#
OVT#
SCL
SDA
W83L784R
R10
4.7K
R16
4.7K
R21
R22
2K
2K
BATFAULT#/GPO4
CAP
10u
VIN2(+3.3VIN)
R9
10K
R15
10K
C1
CPUT1/PII1
CPUT2/PII2
VIN3(VBAT)
FANIN1
FANIN2
RESET#
VREF
VCC
GND
VIN1
VCC
20
19
18
17
16
15
14
13
12
11
C2
CAP
0.1u
VCC
R29
VT1/PII1
VT2/PII2
+3.3VIN
VCORE
VREF
VBAT
10K
Pull-up
FANFAULT#
BATFAULT#
RESET#
R31
R
10K
BATFAULT#
RESET#
uP
TEMPERATURE SENSORING CIRCUIT
Note:
VOLTAGE SENSORING CIRCUIT
VREF
VREF
SDA
SCL
3VCC
1. CPUT1 is for CPU1 temperature and SMARTFAN 1
2. CPUT2 is for CPU2 temperature and SMARTFAN 2
R2
R
R
R3
VCORE
+3.3VIN
VBAT
0
0
PIID+
R25
PIID-
10K 1%
99K
Title
Size
Date:
R13
30K 1%
R14
B
R4
R
4.7K
R8
10K
R1
PWR_DN#
0
R
R
W83L784R Application Circuit
Document Number
784AP.SCH
Thursday, September 09, 1999
R
R
R
R26
232K
R5
R
4.7K
R
WINBOND ELECTRONICS CORP.
VT2/PII2
SMDAT
SMCLK
THERMISTOR
RT1
CPU_VCORE
3VCC
BT1
BATTERY
DC 10V
3300p
10K 1%
VT1/PII1
Sheet
CAP
C4
1
of
1
Rev
0.5