EMC1428 EVB User Manual
SMSC EMC1428
Revision 1.0 (08-21-07)
9
A unique feature of the EMC1428 devices is the ability to select the Hardware System shutdown
temperature based on the resistor attached to the TRIP_SET pin and the tri-state setting of the
SHDN_SEL pin. The EVB allows the user to quickly evaluate each of the many temperature values by
adjusting R50. JP12 can be moved to 3 different states which define the powerup state of beta
compensation and REC. Please see the data sheet for detailed operation of these features.
.
3.9
Default Jumper Settings
Table 3.4 Default Jumper Settings
JP7
On-board diode (Q7)
short / DP
short / DN
Off-board diode (CPU, GPU, etc.)
/
DP
open
remote - /
DN
open
Table 3.3 SHDN_SEL Configuration
SHDN_SEL
JP12
CONNECTION
DESCRIPTION
VDD
1-2
Transistor Mode
(Beta Comp enabled,
REC enabled)
GND
2-3
Diode Mode
(Beta Comp disabled,
REC enabled)
OPEN
OPEN
Simple Mode
(Beta Comp disabled,
REC disabled)
JUMPER
NAME
CONNECTION
DESCRIPTION
JP1
External diode 1
off-board
connection
1 - 2
3 - 4
DP connection
DN connection
JP2
External diode 2
off-board
connection
1 - 2
3 - 4
DP connection
DN connection
JP3
External diode 3
off-board
connection
1 - 2
3 - 4
DP connection
DN connection
JP4
External diode 4
off-board
connection
1 - 2
3 - 4
DP connection
DN connection
JP5
External diode 5
off-board
connection
1 - 2
3 - 4
DP connection
DN connection
Table 3.2 Remote Diode Configurations
JUMPER
CONFIGURATION
PIN 1
PIN 2
PIN 3
PIN 4
