emc2104 Standard Microsystems Corp., emc2104 Datasheet - Page 11

• Manufacturer Part Number: emc2104
• Description: Emc2104 Dual Rpm-based Pwm Fan Controller With Hardware Thermal Shutdown
• Manufacturer: Standard Microsystems Corp.

Dual RPM-Based PWM Fan Controller with Hardware Thermal Shutdown
Datasheet
SMSC EMC2104
PIN NUMBER
EMC2104
10
1
2
3
4
5
6
7
8
9
CLK_IN / GPIO1
DP1 / VREF_T1
PWM2 / GPIO3
SYS_SHDN#
DN1 / VIN1
PIN NAME
SMDATA
ALERT#
SMCLK
GND
VDD
Table 2.1 Pin Description for EMC2104
DATASHEET
DN1 - Negative (cathode) analog input for
VREF_T1 - Reference output for use with
PWM2 - Open Drain PWM drive output for
VIN1 - General voltage input for use with
PWM2 - Push-Pull PWM drive output for
DP1 - Positive (anode) analog input for
Active low interrupt - requires external
GPO1 - General Purpose open drain
GPO3 - General Purpose open drain
SMBus clock input - requires external
Active low Critical System Shutdown
GPO1 - General Purpose push/ pull
GPO3 - General Purpose push-pull
SMBus data input/output - requires
CLK_IN - 32.768KHz clock input.
a thermistor and to drive VIN1
GPI1 - General Purpose Input
GPI3 - General Purpose Input
11
External Diode 1 (default)
External Diode 1 (default)
external pull-up resistor
(software programmed)
Ground connection
PIN FUNCTION
pull-up resistor.
pull-up resistor
Fan 2 (default)
Power Supply
a thermistor
(default)
Output.
Output
Output
Output
output
Fan 2
Revision 1.74 (05-08-08)
DIOD (5V)
DIOD (5V)
PIN TYPE
AIO (2V)
AIO (2V)
OD (5V)
OD (5V)
OD (5V)
OD (5V)
AO (2V)
AI (2V)
DI (5V)
DI (5V)
DI (5V)
DI (5V)
DI (5V)
Power
Power
DO
DO