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PDF ATTM02 Data sheet ( Hoja de datos )
| Número de pieza | ATTM02 | |
| Descripción | (ATTM01 / ATTM02) Processor Thermal Monitor | |
| Fabricantes | Analog Microelectronics | |
| Logotipo |  |
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Hay una vista previa y un enlace de descarga de ATTM02 (archivo pdf) en la parte inferior de esta página. Total 18 Páginas | ||
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AME, Inc.
ATTM01/ATTM02
Processor Thermal Monitor
1. General Description
The ATTM01/ATTM02 are precision remote diode tem-
perature sensors with a 2-wire System Management Bus
(SMBus) serial interface. The ATTM01/ATTM02 measure:
(1) Local temperature and (2) the temperature of a remote
diode based transistor from Computer Processor Unit
(CPU), Graphic Processor Unit (GPU) or other ASICs.
The ATTM01/ATTM02 provide two system alarms:
ALERT# and OVERT#.
(1) ALERT# event occurs when any temperature goes
outside the value that setup by preprogrammed HIGH and
LOW temperature limit registers.
(2) OVERT# event occurs when any temperature ex-
ceeds the OVERT# programmed limit.
ATTM02 has a different SMBus address to the ATTM01.
The SMBus address of the ATTM01 is 0x90 and ATTM02
is 0x94.
2. Features
l Remote and Local Temperature Sensing.
l 1 Accuracy.
l Programmable HIGH/LOW Alarm Temperature
Thresholds.
l ALERT# Output Supports SMBus Protocol.
l OVERT# Output Useful for System Shutdown.
l SMBus-compatible interface.
l SMBus timeout support.
l Packages: SOP-8 and MSOP-8
3. Pin Configuration/ Top Side Mark
www.DataSheet4U.com
VDD
D+
D-
OVERT#
1
2
3
4
8 SMBCLK
7 SMBDATA
6 ALERT#
5 GND
Figure1. ATTM01/ATTM02 Pin Diagram (Top View)
Rev. B.01
1
1 page  
AME, Inc.
ATTM01/ATTM02
Processor Thermal Monitor
6. Electrical Specifications
Parameter
SMBus-COMPATIBLE TIMING (Note 2)
Serial Clock Frequency
Bus Free Time Between STOP and
START Condition
Symbol
fSMBCLK
tBUF
Test Conditions
(Note 3)
Min Typ Max Units
100 kHz
4.7 µs
START Condition Setup Time
4.7 µs
Repeat START Condition Setup Time tSU:STA
90% to 90%
50
ns
START Condition Hold Time
tHD:STA 10% of SMBDATA to 90% of SMBCLK 4
µs
STOP Condition Setup Time
tSU:STO 90% of SMBCLK to 90% of SMBDATA 4
µs
Clock Low Period
tLOW
10% to 10%
4.7
µs
Clock High Period
tHIGH
90% to 90%
4
µs
Data Setup Time
tHD:DAT
(Note 4)
250 µs
Receive SMBCLK/SMBDATA Rise Time tR
1 µs
Receive SMBCLK/SMBDATA Fall Time tF
300 ns
Pulse Width of Spike Suppressed
tSP
0 60 ns
SMBus Timeout
tTIMEOUT SMBDATA low period for interface reset 25 37 45 ms
Note 1: All parameters tested at a single temperature. Specifications over temperature are guaranteed by design.
www.DNataoStehe2e:t4TUim.coinmg specifications guaranteed by design.
Note 3: The serial interface resets when SMBCLK is low for more than t
.
TIMEOUT
Note 4: A transition must internally provide at least a hold time to bridge the undefined region (300ns max) of
SMBCLK’s falling edge.
Rev. B.01
5
5 Page 
AME, Inc.
ATTM01/ATTM02
Processor Thermal Monitor
9.10 Temperature sensor Configuration Register, Access Address: “Command Index = 9h”
Field
ALERT_MASK
STOP
Reserved
CRITI_MASK
Reserved
Type Position
WO [7]
WO [6]
NA [5]
Bits
1
1
1
WO [4]
1
NA [3:0]
4
I Function
0 When set to “1” ALERT# interrupt is masked.
0 When set to “1” then the ADC will be terminated.
0 Reserved. Not implemented.
When set to “1” the Remote/Local diodes exceed
0 the critical set point will no activated the OVER#
pin..
0 Reserved. Not implemented.
9.11 ADC Conversion Rate Register, Access Address: “Command Index = Ah”
Field
Type Position Bits
I
Function
Reserved
N/A [7:4]
CONVERSIO_RATE WO [3:0]
www.DataSheet4U.com
4 0 Reserved. Not implemented.
Control the ADC value update to SMBus register.
The variable rate control can be used to reduce
supply current in portable equipment application.
4’h8: conversion rate is 16 Hz (default value), 4’h7:
conversion rate is 8 Hz, 4’h6: conversion rate is 4
4 4’h8 Hz, 4’h5: conversion rate is 2 Hz, 4’h4: conversion
rate is 1 Hz, 4’h3: conversion rate is 0.5 Hz, 4’h2:
conversion rate is 0.25 Hz, 4’h1: conversion rate is
0.125 Hz, 4’h0: conversion rate is 0.0625 Hz, other
values are reserved.
9.12 Local Diode Alerting High Limit Register, Access Address: “Command Index = Bh”
Field
LALERT_HIGH
Type Position Bits
WO [7:0]
8
I Function
Setting the local diode alerting high limit register.
8’h50
The default value is 80 and the LSB denotes 1
.
9.13 Local Diode Alerting Low Limit Register, Access Address: “Command Index = Ch”
Field
LAERT_LOW
Type Position Bits
WO [7:0]
8
I Function
Setting the local diode alerting low limit register. The
0 default value is 0 and the LSB represents 1 .
9.14 Remote Diode Alerting High Limit Temperature Register, Access Address: “Command Index = Dh”
Field
RHIGH_DATA
Type Position Bits
W/O [7:0]
8
I Function
Host set the remote diode high limit temperature
8’h50 value. The default value set to 80 and LSB
denotes 1 .
Rev. B.01
11
11 Page | ||
| Páginas | Total 18 Páginas | |
| PDF Descargar | [ Datasheet ATTM02.PDF ] | |
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