High-Side Current-Sense and Internal 1°C Temperature Monitor
Datasheet
Table 5.1 Register Set in Hexadecimal Order (continued)
REGISTER
ADDRESS
DEFAULT
VALUE
R/W
REGISTER NAME
FUNCTION
PAGE
61h
64h
65h
66h
68h
R/W
Sense Voltage Low
Limit
Stores the low or negative limit for
the VSENSE voltage
80h
FFh
00h
7Fh
FFh
Page 44
R/W
R/W
R/W
R/W
Source Voltage High
Limit
Stores the high limit for the voltage
on the source side of RSENSE
Page 44
Page 44
Page 44
Page 44
Source Voltage Low
Limit
Stores the low limit for the voltage
on the source side of RSENSE
Sense Voltage Vcrit
Limit
Stores the critical limit for VSENSE
Source Voltage Vcrit
Limit
Stores the critical limit for the
voltage on the source side of
RSENSE
69h
6Ah
FCh
FDh
FEh
FFh
R/W
R/W
R
Sense Vcrit
Hysteresis
Stores the hysteresis for the
VSENSE Vcrit limit
0Ah
0Ah
00h
38h
5Dh
82h
Page 44
Page 44
Page 45
Page 45
Page 46
Page 46
Source Voltage Vcrit
Hysteresis
Stores the hysteresis for the
source voltage Vcrit limits
Product Features
Product ID
SMSC ID
Stores information about which pin
controlled product features are set
R
Stores a fixed value that identifies
each product
R
Stores a fixed value that
represents SMSC
R
Revision
Stores a fixed value that
represents the revision number
5.1
5.2
Data Read Interlock
When any measurement channel high byte register is read (temperature or VSOURCE or VSENSE), the
corresponding low byte is copied into an internal ‘shadow’ register. The user is free to read the low
byte at any time and be guaranteed that it will correspond to the previously read high byte. Regardless
if the low byte is read or not, reading from the same high byte register again will automatically refresh
this stored low byte data.
Block Mode Support
All of the status and temperature data may be retrieved with a block read of 6 bytes starting at register
address 34h.
All of the voltage measurement, current sense data, and power information may be retrieved with a
block read of 6 bytes starting at register address 54h.
Revision 1.2 (09-27-10)
SMSC EMC1701
DATA3S0HEET
SMSC [ SMSC CORPORATION ]
