EMC1701 Datasheet, PDF (38/54 Pages) SMSC Corporation – High-Side Current-Sense and Internal 1°C Temperature Monitor

High-Side Current-Sense and Internal 1°C Temperature Monitor
Datasheet
„ ‘0’ - The Peak Detector circuitry will assert the ALERT pin when a current spike is detected. The
ALERT pin must be configured to operate in Comparator mode or it will not be asserted.
„ ‘1’ (default) - The Peak Detector circuitry will assert the THERM pin when a current spike is
detected.
Bits 3 - 2 - V_QUEUE[1:0] - Determine the number of consecutive measurements that V_SOURCE must
exceed the limits before flagging an interrupt.
Table 5.18 Voltage Queue Settings
V_QUEUE[1:0]
1
0
NUMBER OF CONSECUTIVE OUT-OF-LIMIT MEASUREMENTS
0
0
0
1
1
0
1
1
1 (default)
2
3
4
Bits 1-0 - V_AVG[1:0] - Controls the digital averaging that is applied to the source voltage
measurement, as shown in Table 5.19.
Table 5.19 Voltage Averaging Settings
V_AVG[1:0]
1
0
AVERAGING
0
0
Disabled (default)
0
1
2x
1
0
4x
1
1
8x
5.16 Current Sense Sampling Configuration Register
ADDR
51h
Table 5.20 Current Sense Sampling Configuration Register
R/W
REGISTER
R/W
Current Sense
Sampling Config
B7
B6
CS_QUEUE
[1:0]
B5
B4
CS_SAMP_
AVG [1:0]
B3 B2 B1 B0
CS_SAMP_
TIME[1:0]
CS_RNG
[1:0]
DEFAULT
03h
The Current Sense Sampling Configuration register stores the controls for determining the Current
Sense sampling / update time.
Bits 7 - 6 - CS_QUEUE[1:0] - Determine the number of consecutive measurements that the measured
V_SENSE must exceed the limits before flagging an interrupt.
Revision 1.2 (09-27-10)
38
DATASHEET
SMSC EMC1701