emc1403 Standard Microsystems Corp., emc1403 Datasheet - Page 34

• Manufacturer Part Number: emc1403
• Description: 1 Degree C Temperature Sensor With Beta Compensation
• Manufacturer: Standard Microsystems Corp.

Revision 1.30 (05-06-08)
6.7
6.8
6.9
ADDR.
ADDR.
ADDR
0Fh
1Ah
19h
20h
21h
30h
11h
12h
R/W
R/W
R/W
R/W
R/W
R/W
R/W
The Scratchpad Registers are Read Write registers that are used for place holders to be software
compatible with legacy programs. Reading from the registers will return what is written to them.
The One Shot Register is used to initiate a one shot command. Writing to the one shot register, when
the device is in standby mode and BUSY bit (in Status Register) is ‘0’, will immediately cause the ADC
to update all temperature measurements. Writing to the One Shot Register while the device is in active
mode will have no affect.
The THERM Limit Registers are used to determine whether a critical thermal event has occurred. If
the measured temperature exceeds the THERM Limit, then the THERM pin is asserted. The limit
setting must match the chosen data format of the temperature reading registers.
Scratchpad Registers
One Shot Register
Therm Limit Registers
W
R/W
R/W
R/W
REGISTER
Internal Diode
THERM Limit
THERM Limit
THERM Limit
THERM Limit
One Shot
REGISTER
Hysteresis
External
External
External
Diode 1
Diode 2
THERM
Diode 3
REGISTER
Scratchpad
Scratchpad
Writing to this register initiates a single conversion cycle. Data
B7
Table 6.10 Therm Limit Registers
128
128
128
128
128
B7
Table 6.8 Scratchpad Register
Table 6.9 One Shot Register
B7
B6
7
7
DATASHEET
B6
64
64
64
64
64
is not stored and always reads 00h
B6
B5
6
6
34
B5
32
32
32
32
32
B4
B5
5
5
B4
16
16
16
16
16
B4
B3
4
4
1°C Temperature Sensor with Beta Compensation
B3
8
8
8
8
8
B3
3
3
B2
B2
B2
4
4
4
4
4
2
2
B1
B1
B1
2
2
2
2
2
1
1
SMSC EMC1403/EMC1404
B0
B0
B0
1
1
1
1
1
0
0
DEFAULT
DEFAULT
DEFAULT
(85°C)
(85°C)
(85°C)
(10°C)
(85°C)
Datasheet
00h
0Ah
00h
00h
55h
55h
55h
55h