Datasheet

LM95241
www.ti.com SNIS143E –AUGUST 2006–REVISED MARCH 2013
P7 P6 P5 P4 P3 P2 P1 P0
Command
P0-P7: Command
Table 6. Register Summary
Power-On
Command
Name Default Value Read/Write # of used bits Comments
(Hex)
(Hex)
Status Register 02h - RO 5 4 status bits and 1 busy bit
Configuration Register 03h 00h R/W 5 Includes conversion rate control
Remote Diode Filter Control 06h 05h R/W 2 Controls thermal diode filter
setting
Remote Diode Model Type 30h 01h R/W 2 Selects the 2N3904 or Intel
Select processor on 65nm or 90nm
process thermal diode model
Remote Diode TruTherm Mode 07h 01h 6 Enables or disables TruTherm
Control technology for Remote Diode
measurements
1-shot 0Fh - WO - Activates one conversion for all
3 channels if the chip is in
standby mode (i.e. RUN/STOP
bit = 1). Data transmitted by the
host is ignored by the LM95241.
Local Temperature MSB 10h - RO 8
Remote Temperature 1 MSB 11h - RO 8
Remote Temperature 2 MSB 12h - RO 8
Local Temperature LSB 20h - RO 2 All unused bits will report zero
Remote Temperature 1 LSB 21h - RO 3/5 All unused bits will report zero
Remote Temperature 2 LSB 22h - RO 3/5 All unused bits will report zero
Manufacturer ID FEh 01h RO
Revision ID FFh A4h RO
STATUS REGISTER
(Read Only Address 02h):
D7 D6 D5 D4 D3 D2 D1 D0
Busy Reserved R2TME R1TME RD2M RD1M
0 0 0
Bits Name Description
7 Busy When set to "1" the part is converting.
6-4 Reserved Reports "0" when read.
3 Remote 2 TruTherm Mode Enabled When set to "1" indicates that the TruTherm Mode has been activated for
(R2TME) Remote diode 2. After being enabled TruTherm Mode will take at most one
conversion cycle to be fully active. This bit will be set even if the diode is
desconnected.
2 Remote 1 TruTherm Mode Enabled When set to "1" indicates that the TruTherm Mode has been activated for
(R1TME) Remote diode 1. After being enabled TruTherm Mode will take at most one
conversion cycle to be fully active. This bit will be set even if the diode is
disconnected.
1 Remote Diode 2 Missing (RD2M) When set to "1" Remote Diode 2 is missing. (See DIODE FAULT DETECTION
for further details.) Temperature Reading is FFE0h which converts to 255.875
°C if unsigned format is selected or 8000h which converts to –128.000 °C if
signed format is selected. Note, connecting a 3904 transistor to Remote 2
inputs with TruTherm mode active may also cause this bit to be set.
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