Quad Channel 1°C Temperature Sensor with Beta Compensation and 1.8V SMBus Communications
Datasheet
SMSC EMC1184 33 Revision 1.0 (07-11-13)
DATASHEET
When the device is in Standby mode, updating the limit registers will have no effect until the next
conversion cycle occurs. This can be initiated via a write to the One Shot Register (see Section 6.8,
"One Shot Register 0Fh") or by clearing the RUN / STOP bit (see Section 6.4, "Configuration Register
03h / 09h").
6.7 Scratchpad Registers 11h and 12h
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.
6.8 One Shot Register 0Fh
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 effect.
6.9 Therm Limit Registers
Table 6.8 Scratchpad Register
ADDR R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
11h R/W Scratchpad 7 6 5 4 3 2 1 0 00h
12h R/W Scratchpad 7 6 5 4 3 2 1 0 00h
Table 6.9 One Shot Register
ADDR. R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
0Fh W One Shot
Writing to this register initiates a single conversion cycle. Data
is not stored and always reads 00h
00h
Table 6.10 Therm Limit Registers
ADDR. R/W REGISTER B7 B6 B5 B4 B3 B2 B1 B0 DEFAULT
19h R/W
External
Diode 1
Therm Limit
128 64 32 16 8 4 2 1
55h
(85°C)
1Ah R/W
External
Diode 2
Therm Limit
128 64 32 16 8 4 2 1
55h
(85°C)
20h R/W
Internal Diode
Therm Limit
128 64 32 16 8 4 2 1
55h
(85°C)
