NE1617ADS NXP Semiconductors, NE1617ADS Datasheet - Page 10

• Manufacturer Part Number: NE1617ADS
• Description: Board Mount Temperature Sensors I2C LOC +/- 2OC AND REM +/- 3OC TS
• Manufacturer: NXP Semiconductors

Specifications of NE1617ADS

• Full Temp Accuracy: +/- 3 C, +/- 5 C
• Package / Case: SSOP-16
• Digital Output - Bus Interface: Serial (2-Wire)
• Maximum Operating Temperature: + 125 C
• Minimum Operating Temperature: - 55 C
• Output Type: Digital
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: NE1617ADS,112

NXP Semiconductors
NE1617A_4
Product data sheet
8.3.6 One-shot command
8.3.7 Status register
8.3.8 Alert interrupt
commands of registers named WIHL, WILL, WEHL, WELL, RIHL, RILL, REHL, RELL,
accordingly. The POR default values are +127 C (0111 1111) for the HIGH limit and
The one-shot command is not actually a data register as such and a write operation to it
will initiate an ADC conversion. The send byte format of the SMBus, as described later,
with the use of OSHT command (0Fh), is used for this writing operation. In normal
free-running-conversion operation mode of the device, a one-shot command immediately
forces a new conversion cycle to begin. However, if a conversion is in progress when a
one-shot command is received, the command is ignored. In software standby mode the
one-shot command generates a single conversion and comparison cycle and then puts
the device back in its standby mode after the conversion. In hardware standby mode, the
one shot is inhibited.
The content of the status register reflects condition status resulting from all of these
activities: comparisons between temperature measurements and temperature limits, the
status of ADC conversion, and the hardware condition of the connection of external diode
to the device. Bit assignments and bit functions of this register are listed in
register can only be read using the command of register named RS. Upon POR, the
status of all flag bits are reset to zero. The status byte is cleared by any successful read of
the status register unless the fault condition persists.
Notice that any one of the fault conditions, except the conversion busy, also introduces an
Alert interrupt to the SMBus that will be described in
one-shot command is executed, the status byte should be read after the conversion is
completed, which is about 170 ms after the one-shot command is sent.
Table 8.
[1]
[2]
The ALERT output is used to signal Alert interruption from the device to the SMBus and is
active LOW. Because this output is an open-drain output, a pull-up resistor (10 k typical)
to V
SMBus. An Alert interrupt is asserted by the device whenever any one of the fault
conditions, as described in
equals or exceeds corresponding temp limits, the remote diode is physically disconnected
from the device pins. Alert interrupt signal is latched and can only be cleared by reading
Bit
7 (MSB)
6
5
4
3
2
1 to 0
55 C (1100 1001) for the LOW limit.
These flags stay HIGH until the status register is read or POR is activated.
This flag stays HIGH until POR is activated.
DD
is required, and slave devices can share a common interrupt line on the same
Status register bit assignment
Symbol
BUSY
IHLF
ILLF
EHLF
ELLF
OPEN
-
[1]
[1]
[1]
[1]
[2]
POR state
n/a
0
0
0
0
0
0
Rev. 04 — 30 July 2009
Section 8.3.7 “Status
Function
HIGH when the ADC is busy converting
HIGH when the internal temperature high limit has tripped
HIGH when the internal temperature low limit has tripped
HIGH when the external temperature high limit has tripped
HIGH when the external temperature low limit has tripped
HIGH when the external diode is opened
reserved
Temperature monitor for microprocessor systems
register”, occurs: measured temperature
Section
8.3.8. Also, whenever a
NE1617A
© NXP B.V. 2009. All rights reserved.
Table
8. This
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