W83775G
Nuvoton
H/W Monitoring IC
DATE: 25TH , JANUARY, 2010
REVISION: 1.4
W83775G
TABLE OF CONTENTS-
1.
GENERAL DESCRIPTION ......................................................................................................... 1
1.1
2.
Product Selection Guide ................................................................................................. 1
FEATURES ................................................................................................................................. 2
2.1
Monitoring Items - Temperature ..................................................................................... 2
2.2
General ........................................................................................................................... 2
2.3
Applications..................................................................................................................... 2
3.
KEY SPECIFICATIONS .............................................................................................................. 3
4.
BLOCK DIAGRAM ...................................................................................................................... 3
5.
PIN CONFIGURATION ............................................................................................................... 4
6.
PIN DESCRIPTION ..................................................................................................................... 5
7.
FUNCTIONAL DESCRIPTION.................................................................................................... 6
8.
7.1
General Description ........................................................................................................ 6
7.2
Access Interface ............................................................................................................. 7
7.3
ALERT Output Mode ..................................................................................................... 8
7.3.1
ALERT Output Comparator Mode ................................................................................. 8
7.3.2
ALERT Output Interrupt Mode ....................................................................................... 8
7.3.3
ALERT Output SMBus ALERT Mode .......................................................................... 10
7.4
T _ CRIT _ A Output and T_CRIT flags ....................................................................... 11
7.5
Measured Temperature Data Format ........................................................................... 12
7.5.1
Measure Remote Temperature Data Format .................................................................. 12
7.5.2
Measure Local Temperature Data Format...................................................................... 12
7.6
Digital Filter ................................................................................................................... 13
7.7
Fault Detect................................................................................................................... 14
7.8
Conversion Rate and Moving Average ......................................................................... 14
CONTROL AND STATUS REGISTER ..................................................................................... 15
8.1
W83775G Registers ..................................................................................................... 15
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
9.
8.2
Data Format of Temperature Registers ........................................................................ 17
8.3
Status Register (SR1) ................................................................................................... 18
8.4
Status Register 2 (SR2) ................................................................................................ 18
8.5
Configuration Register (C1) .......................................................................................... 19
8.6
Configuration Register 2 (C2) ....................................................................................... 19
8.7
T_CRIT Hysteresis Register (TH) ................................................................................. 19
8.8
Conversion Rate Register (CR) .................................................................................... 20
8.9
Filter and Alert Configure Register (RDTFA, RDTFB) .................................................. 21
8.10
Ideality (IDEAA, IDEAB) ............................................................................................... 21
8.11
Remote Temperature B Enable (RTBE) *for W83775G-2 only. .................................. 22
ELECTRICAL CHARACTERISTIC ........................................................................................... 23
9.1
Absolute Maximum Ratings .......................................................................................... 23
9.2
DC Characteristics ........................................................................................................ 23
10.
AC CHARACTERISTICS .......................................................................................................... 24
11.
TOP MARKING SPECIFICATIONS .......................................................................................... 25
12.
ORDERING INFORMATION..................................................................................................... 25
13.
PACKAGE DRAWING AND DIMENSIONS .............................................................................. 26
14.
REVISION HISTORY ................................................................................................................ 27
- II -
Publication Release Date: Jan, 2010
Revision 1.4
W83775G
1. GENERAL DESCRIPTION
W83775G, a two remote and one local temperature sensor with 2 temperature alert outputs and with
TM
2-wire System Management Bus (SMBus ) serial interface, is Nuvoton hardware monitoring IC
specifically designed for PC, notebook and any embedded environments. The W83775G uses Ideality
factor configuration to eliminate temperature measurement error. The remote temperature sensor
input can be connected to thermal diode or transistor such as 2N3904. Because of the two remote
temperature sensors, the W83775G can report both temperatures of diodes with Dual-core CPU. A
10-bit plus sign ADC (Analog to Digital Converter) with 0.125C resolutions is built inside the
W83775G to convert the monitored temperature value. Programmable conversion rates and standby
mode support low-power operation.
The W83775G is high temperature accuracy, low-power consumption, SMBus
and is available in 10-pin, TSSOP package. The working voltage is 3.3 V ± 10%.
1.1
TM
serial interface IC
Product Selection Guide
Table 1.1 Part Selection
PART NUMBER
SMBUS
ADDRESS
W83775G
1001_100xb
W83775G-2
FUNCTIONALITY
REMOTE
LOCAL
OTHER
2
1
Programmable
temperature
High/Low limit
1001_101xb
-1-
PACKAGE
TSSOP-10
(MSOP-10)
Publication Release Date: Jan, 2010
Revision 1.4
W83775G
2. FEATURES
2.1
Monitoring Items - Temperature
Measure the temperature with high accuracy
One on-chip thermal sensor
Two remote temperature sensor inputs
Ideality Factor Configuration on External Diodes.
Remote Diode Fault Detection.
2.2
General
Interface: SMBus
3.3V±10% VCC operation
10 bit plus sign remote temperature data format, 0.125C resolution
Programmable offset register for various thermal diodes
SMBus
Programmable conversion rates allow user to optimize the power consumption.
Supply 2 alert output on first remote channel: ALERT and T _ CRIT _ A
TM
TM
serial interface
2.0 compatible interface, supports TIMEOUT
TM
ALERT Output supports SMBus 2.0 protocol
Programmable Temperature High/Low limit and hysteresis for ALERT and T _ CRIT _ A output
Report both temperatures of diodes with Dual-core CPU.
2.3
Applications
Desktop and Notebook computers, support down to 45nm processes and below. (Please refer to
application notice for details)
Hardware Management
Servers
Embedded Applications
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
3. KEY SPECIFICATIONS
Local temperature range and accuracy
Remote temperature range and accuracy
-40C to +127C (TD)
Typ. 1C (25C ~70C)
Typ. 2C (-40C ~127C)
*2
Max. 3C (-40C~127C)
Supply voltage
Operating supply current
Low Power Operation
ADC resolution include sign bit
3.3V ± 10%
900 uA typ.
15μA Standby Current
10 Bits
-40C to +125C (TA)
Typ. 2C (20C~40C)
*1
Max. 3C (-40C~125C)
*1:
Guaranteed by design from -40~125 degree C, 100% tested at 85 degree C.
*2: Guaranteed by design from -40~127 degree C, 100% tested at 85 degree C.
4. BLOCK DIAGRAM
xI
Control
Logic
Current
Generator
Command
Coder/ DeCoder
SMBus
SDA
SCLK
D1+
REGISTER BANK
D1-
( Local/ Remote)
Temperature
Registers
OVER
TEMPERATURE
COMPARATOR
Configuration
Registers
Status
Registers
Fault Queue
ALERT
D2+
D2Analog Mux
Local Thermal
Sensor
Sensor
Circuitry
ADC
T_CRIT_A
Limit/Critical
(Hysteresis)
Registers
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
5. PIN CONFIGURATION
D1+
D1D2+
D2 T_CRIT_A
1
2
3
4
W83775G
G
5
-4-
10
8
9
7
8
7
7
6
6
SCLK
SDA
ALERT
VDD
GND
Publication Release Date: Jan, 2010
Revision 1.4
W83775G
6. PIN DESCRIPTION
PIN TYPE
PIN Attribute
I/OD12ts
TTL level and schmitt trigger open drain output with 12 mA sink capability
OD12
Open-drain output pin with 12 mA sink capability
INts
TTL level input pin and schmitt trigger
AIN
Input pin (Analog)
PIN NAME
NO
PIN TYPE
DESCRIPTION
D1+
1
AIN
Connect to Thermal Diode Anode.
D1-
2
AIN
Connect to Thermal Diode Cathode.
D2+
3
AIN
Connect to Thermal Diode Anode.
D2-
4
AIN
Connect to Thermal Diode Cathode.
T _ CRIT _ A
5
OD12
T_CRIT alarm output, for interrupt or shutdown control.
GND
6
VDD
7
POWER
ALERT
8
OD12
SDA
9
I/OD12ts
SCLK
10
INt s
GROUND Power supply ground
DC power supply, voltage input 3.3V 10%.
Alarm output, for interrupt control.
Digital I/O (Open drain). SMBus bidirectional serial data. Requires
SMBus pull-up.
Digital Input (Open drain). SMBus serial clock input. Requires
SMBus pull-up.
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
7. FUNCTIONAL DESCRIPTION
7.1
General Description
The W83775G provides two remote temperature sensor inputs which can be connected to remote
2N3904 transistor, or CPU/GPU thermal diode, as well as one local on-die thermal sensor to detect
ambient temperature. The W83775G supplies Ideality Factor Configuration on two external diodes to
eliminate the temperature measurement error. The W83775G can also report both temperatures of
external temperature zones. Selectable conversion rates and modes allow low power operation.
The temperature measured by the W83775G is digitally compared with the value stored in the
programmable High/Low limit Registers and T_CRIT registers. Any out-of-limit value can be detected
by monitoring Status Register (SR). The W83775G also supports SMBus
TM
2.0 ALARM protocol and
TIMEOUT.
The data format of the remote temperature is represented by a 10-bit plus sign, two’s complement
word and 11-bit unsigned binary word with an LSB equal to 0.125C. The real temperature equals the
measured temperature plus or minus offset value. Offset value can be set in offset registers. The date
format of the offset registers is also the same as the data format of remote temperature. Local
Temperature data is represented by an 8-bit plus sign, two’s complement format, with an LSB equal to
1C.
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
7.2
Access Interface
The W83775G provides SMBus serial interface to read/write internal registers, and the SMBus
address for read and write is 10011001b and 10011000b, respectively.
The W83775G-2 respond to hard-wire SMBus slave address as shown in Table 1.1.
The first serial bus access timing is shown as follows:
(a) Serial bus write to internal address register followed by the data byte
0
7
8
0
7
8
SCL
10
SDA
10
Start By
Master
0
1
00
1
10
R/W
D7
D6
AckAck
by
by
771AWG
78 5R
Frame 1
Serial Bus Address Byte
D5
D4
D3
D2
D1
D0
AckAck
by
by
771AWG
78 5R
Frame 2
Internal Index Register Byte
0
7
8
SCL (Continued)
SDA (Continued)
D7
D6
D5
D4
D3
D2
D1
D0
Ack
Ack
by
byby
771AWG
78
784R
5R
Frame 3
Data Byte
Stop
by
Master
Figure 1. Serial Bus Write to Internal Address Register followed by the Data By te
(b) Serial bus read form internal address register followed by the data byte
0
SCL
SDA
10
Start By
Master
7
01
0
1
1
00
01
0
D7
R/W
7
D6
Ack by
771AWG
Frame 1
Serial Bus Address Byte
0
8
1
2
3
4
5
6
01
0
1
1
00
01
D5
D4
D3
D2
D1
D0
Ack
by
771AWG
Frame 2
Internal Index Register Byte
7
8
8
0
1
2
3
4
5
6
7
D7
D6
D5
D4
D3
D2
D1
D0
8
SCL(Continued)
SDA(Continued)
1
Frame 3
Serial Bus Byte
R/W
Ack
ack
by
by
771AWG
785R
-7-
by
Frame 4
Data Byte
784R
Ack
no
Ack
by
Master
Stop by
Master
Publication Release Date: Jan, 2010
Revision 1.4
W83775G
7.3
ALERT Output Mode
The W83775G ALERT pin is an active-low, open-drain output pin which is triggered when the
measured temperature exceeds the limits defined in limit registers. There are three types of ALERT
output mode: ALERT output comparator mode, ALERT output interrupt mode, and ALERT output
SMBus ALERT mode.
7.3.1
ALERT Output Comparator Mode
Fig. 7.3.1 shows the mechanism of ALERT output comparator mode. Setting Filter and Alert
Configure Register, or register address BFh, D0 to 1 enables ALERT output comparator mode. In this
mode, the ALERT pin will be alerted if the monitored temperature is out-of -limit and the ALERT pin
keeps low until the temperature goes back to the target range. This mode is not power-on default
setting.
High Limit
Measured Tmperature By
W83775G
W83775G ALERT Pin
W83775G High Limit
Status
Fig. 7.3.1 Response of
7.3.2
ALERT
output comparator mode
ALERT Output Interrupt Mode
Fig. 7.3.2 shows the mechanism of ALERT output interrupt mode. In this mode, the W83775G will set
the ALERT mask bit D7 of Configuration Register during a read of the Status Register if any flag in
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
Status Register, except the Busy flag D7 and OPEN flag D2, is set. This prevents further ALERT
triggering until the master has reset the ALERT mask bit, at the end of the interrupt service routine.
The Status Register flags are cleared only upon a read command from the master and will be realerted at the end of the next conversation if the measured temperature still falls outside of the allowed
range.
High Limit
Measured Tmperature By
W83775G
ALERT mask set in
response to reading of
status register by master
W83775G ALERT Pin
End of Temperature
conversion
W83775G High Limit
Status
Fig. 7.3.2 Response of
ALERT
output interrupt mode
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
7.3.3
ALERT Output SMBus ALERT Mode
Fig. 7.3.3 shows the mechanism of the ALERT output SMBus
TM
ALERT mode. In this mode, the
TM
ALERT output of the W83775G is connected to the SMBus alert line which has more than one
device connected to it. Through such an implementation, SMBus
TM
ALERT mode can assist the
master in resolving which slave generates an interrupt. When the measured temperature falls outside
of the allowed range, the ALERT pin will be pulled low and the corresponding alert flags in Status
Register will be pulled high. The ALERT mask bit will just be set if there is a read command for Status
Register or when SMBus
TM
ALERT Response Address (ARA) occurs from master (Alert Response
Address is 0001100). Meanwhile, the W83775G will generate and return its own address to the
master. If the temperature never falls outside of the allowed range, the latched ALERT pin can be
released by the reset ALERT mask bit, and the latched corresponding alert flags in Status Register
can be released by reading command for Status Register.
Please also refer to the
W83L771AWG_773G_775G Application Note 3.pdf for implementation.
High Limit
Measured Tmperature By
W83775G
ALERT mask set in
response to Alert
Response Address from
master
W83775G ALERT Pin
End of Temperature
conversion
W83775G High Limit
Status
Fig. 7.3.3 Response of
ALERT
output SMBus alert mode
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
7.4
T _ CRIT _ A Output and T_CRIT flags
T _ CRIT _ A Output pulls low when the measured temperature exceeds the critical temperature
(T_CRIT) defined in 19h, 1Ah and 20h for Remote A, Remote B and Local T_CRIT set point,
respectively. Once the T _ CRIT _ A Output pulls low, it will not be set high until the measured
temperature is lower than (T_CRIT － TH), where TH is Temperature Hysteresis. Status Register will
not be reset until it is read and the temperature conversion falls below the T_CRIT set point. Figure
7.4 shows this mechanism. Please also refer to the W83L771AWG_773G_775G Application Note
4.x.pdf for implementation.
T_CRIT# Set point
TH Value
T_CRIT - TH
Measured temperature by W83775G
W83775G T_CRIT# pin
W83775G T_CRIT status
W83775G read command for
status register
W83775G ALERT# pin
W83775G status register read
ALERT Mask will be set
Fig. 7.4 Response of
T _ CRIT _ A
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output
Publication Release Date: Jan, 2010
Revision 1.4
W83775G
7.5
Measured Temperature Data Format
The W83775G can measure remote temperature with the resolution of 11-bit two’s complement format
and local temperature with the resolution of 8-bit two’s complement format.
7.5.1
Measure Remote Temperature Data Format
Table 7.5.1 shows remote temperature data with 11-bit two’s complement format.
Table 7.5.1 Measured Remote Temperature Data Format
TEMPERATURE
7.5.2
8-BIT DIGITAL OUTPUT HIGH BYTE
8-BIT DIGITAL OUTPUT LOW BYTE
+127.875°C
0111,1111
111X,XXXX
+25.750°C
0001,1001
110X,XXXX
+2.250°C
0000,0010
010X,XXXX
+1.125°C
0000,0001
001X,XXXX
+0.000°C
0000,0000
000X,XXXX
- 1.125°C
1111,1110
111X,XXXX
- 2.250°C
1111,1101
110X,XXXX
- 25.750°C
1110,0110
010X,XXXX
- 127.875°C
1000,0000
001X,XXXX
Measure Local Temperature Data Format
Table 7.5.2 shows the local temperature data with 8-bit two’s complement format.
Table 7.5.2 Measured Local Temperature Data Format
TEMPERATURE
8-BIT DIGITAL OUTPUT
+127°C
0111,1111
+25°C
0001,1001
+2°C
0000,0010
+1°C
0000,0001
+0°C
0000,0000
- 1°C
1111,1111
- 2°C
1111,1110
- 25°C
1110,0111
- 128°C
1000,0000
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
7.6
Digital Filter
The W83775G provides three levels Digital Filter to suppress erroneous remote temperature readings
due to noise. The register address to set digital filter is in Filter and Alert Configure Resister. Setting
bits = selects no filter. Setting bits = or selects filter level 1.
Setting bits = selects level 2. Figure 7.6.1 shows the step response of reading
remote temperature at different filter level, and Figure 7.6.2 shows the impulse response.
Temperature (oC)
5
0
4
5
4
0
No Filter Level
3
5
Filter Level 1
Filter Level 2
3
0
2
5 0
5
1
1
2
0
5
0
SAMPLE NUMBER
2
5
Figure 7.6.1 Step Response of reading remote temperature
Temperature (oC)
5
0
4
5
4
0
No Filter Level
3
5
Filter Level 1
Filter Level 2
3
0
2
5 0
5
1
1
2
0
5
0
SAMPLE NUMBER
2
5
Figure 7.6.2 Impulse Response of reading remote temperature
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
7.7
Fault Detect
Table 7.7 shows the response of Fault Detection if false connection of D+ and D- occurs after power
up. Please also refer to the W83L771AWG_773G_775G Application Note 2.pdf for implementation.
Table 7.7 response of Fault Detect
CONNECTION
STATUS REGISTER BIT
MEASURED REMOTE
TEMPERATURE
(VDD, Floating)
1
+127.875 ℃
(GND, Floating)
1
+127.875 ℃
(Floating, Floating)
1
+127.875 ℃
Short
1
+127.875 ℃
(D+, D-)
7.8
Conversion Rate and Moving Average
The W83775G provides an embedded moving average into conversion rate selection. Each
conversion rate can set a couple of proper noise rejection and average supply current.
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
8. CONTROL AND STATUS REGISTER
8.1
W83775G Registers
POWER ON DEFAULT STATES
READ
ADDRESS
WRITE
ADDRESS
(HEX)
(HEX)
BINARY / HEX
Local Temperature (LT)
00h
Read Only
0000,0000b / 00h
0
Remote Temperature A High Byte
(RTAHB)
01h
Read Only
0000,0000b / 00h
0
Status Register 1 (SR1)
02h
Read Only
0000,0000b / 00h
0
Configuration 1 (C1)
03h
09h
0000,0001b / 01h
1
Conversion Rate (CR)
04h
0Ah
0000,1000b / 08h
8
Local High Set point (LHS)
05h
0Bh
0100,0110b / 46h
70
Local Low Set point (LLS)
06h
0Ch
1101,1011b / DBh
-40
Remote A High Set point High Byte
(RAHSHB)
07h
0Dh
0100,0110b / 46h
70
Remote A Low Set point High Byte
(RALSHB)
08h
0Eh
1101,1011b / DBh
-40
Remote Temperature A Low Byte (RTALB)
10h
Read Only
0000,0000b / 00h
0
Remote Temperature A Offset High Byte
(RTAOHB)
11h
11h
0000,0000b / 00h
0
Remote Temperature A Offset Low Byte
(RTAOLB)
12h
12h
0000,0000b / 00h
0
Remote A High Set point Low Byte
(RAHSLB)
13h
13h
0000,0000b / 00h
0
Remote A Low Set point Low Byte
(RALSLB)
14h
14h
0000,0000b / 00h
0
Remote Temperature B Offset High Byte
(RTBOHB)
15h
15h
0000,0000b / 00h
0
Remote Temperature B Offset Low Byte
(RTBOLB)
16h
16h
0000,0000b / 00h
0
Status Register 2 (SR2)
17h
Read Only
0000,0000b / 00h
0
Configuration 2 (C2)
18h
18h
0000,0000b / 00h
0
REGISTER NAME
(HEX)
DECIMAL
Remote A T_CRIT Set point (RCAS)
19h
19h
0110,1110b / 6Eh
110
Remote B T_CRIT Set point (RCBS)
1Ah
1Ah
0110,1110b / 6Eh
110
Remote B High Set point High Byte
(RBHSHB)
1Bh
1Bh
0100,0110b / 46h
70
Remote B Low Set point High Byte
(RBLSHB)
1Ch
1Ch
1101,1011b / DBh
-40
Remote B High Set point Low Byte
(RBHSLB)
1Dh
1Dh
0000,0000b / 00h
0
Remote B Low Set point Low Byte
(RBLSLB)
1Eh
1Eh
0000,0000b / 00h
0
Local T_CRIT Set point (LCS)
20h
20h
0101,0101b / 55h
85
T_CRIT Set point (TH)
21h
21h
0000,1010b / 0Ah
10
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
POWER ON DEFAULT STATES
READ
ADDRESS
WRITE
ADDRESS
(HEX)
(HEX)
BINARY / HEX
Remote Temperature B High Byte
(RTBHB)
24h
Read Only
0000,0000b / 00h
0
Remote Temperature B Low Byte (RTBLB)
25h
Read Only
0000,0000b / 00h
0
Remote Diode Temperature Filter (RDTFA,
RDTFB)
BFh
BFh
0000,0000b / 00h
0
Remote Diode A ideality (IDEAA)
E3h
E3h
1000,0100b / 84h
132
Remote Diode B ideality (IDEAB)
E4h
E4h
1000,0100b / 84h
132
Write only
E8h
0101,0101b / 55h
85
Read Manufacturer’s ID (RMID)
FEh
Read Only
0101,1100b / 5Ch
92
0001,0000b / 10h
16
Read Die Revision (RDR)
FFh
Read Only
0001,0001b / 11h
17
0001,0011b / 13h
19
REGISTER NAME
(HEX)
Remote Temperature B Enable (RTBE)
*For W83775G-2 only.
- 16 -
DECIMAL
Publication Release Date: Jan, 2010
Revision 1.4
W83775G
8.2
Data Format of Temperature Registers
(LT, RTAHB, RTALB, LHS, RAHSHB, RAHSLB, LLS, RALSHB, RALSLB, RTBHB, RTBLB,
RBHSHB, RBHSLB, RBLSHB, RBLSLB, RTAOHB, RTAOLB, RTBOHB, RTBOLB, RCAS, RCBS,
LCS)
The following table shows the data format, Two’s Complement, of the temperature, including Local
Temperature (LT), Remote Temperature A High Byte (RTAHB), Remote Temperature A Low Byte
(RTALB), Local High Set point (LHS), Remote A High Set point High Byte (RAHSHB), Remote A High
Set point Low Byte (RAHSLB), Local Low Set point (LLS), Remote A Low Set point High Byte
(RALSHB), Remote A Low Set point Low Byte (RALSLB), Remote Temperature B High Byte
(RTBHB), Remote Temperature B Low Byte (RTBLB), Remote B High Set point High Byte (RBHSHB),
Remote B High Set point Low Byte (RBHSLB), Remote B Low Set point High Byte (RBLSHB), Remote
B Low Set point Low Byte (RBLSLB), Remote Temperature A Offset High Byte (RTAOHB), Remote
Temperature A Offset Low Byte (RTAOLB), Remote Temperature B Offset High Byte (RTBOHB),
Remote Temperature B Offset Low Byte (RTBOLB), Remote A T_CRIT Set point (RACS), Remote B
T_CRIT Set point (RBCS), and Local T_CRIT Set point (LCS),
Only remote temperature, remote high set point, remote low set point, and remote temperature offset
support two bytes, up to 0.125℃ resolution for the temperature data format; others support one byte,
up to 1℃ resolution for the temperature data format.
REGISTER OF HIGH BYTE: LT, RTAHB, RTBHB, LHS, RAHSHB, RBHSHB, LLS, RALSHB, RBLSHB,
RTAOHB, RTBOHB,CAS, RCBS, LCS
DATA FORMAT: TWO’S COMPLEMENT FORMAT
BIT
D7
D6
D5
D4
D3
D2
D1
D0
VALUE
Sign
64
32
16
8
4
2
1
Unit: ℃
REGISTER OF LOW BYTE: RTALB, RTBLB, RAHSLB, RBHSLB, RALSLB , RBLSLB, RTAOLB,
RTBOLB
DATA FORMAT: TWO’S COMPLEMENT FORMAT
BIT
D7
D6
D5
D4
D3
D2
D1
D0
VALUE
0.5
0.25
0.125
0
0
0
0
0
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
8.3
Status Register (SR1)
Read Address: 02h
Write Address: Read Only
Power On Default States: 00h
BIT
FLAG NAME
DESCRIPTION
D7
Busy
Setting to ‘1’ indicates ADC is busy converting.
D6
LHIGH
Setting to ‘1’ indicates a measured Local Temperature Higher than Local High
set point (High Limit).
D5
LLOW
Setting to ‘1’ indicates a measured Local Temperature lower than Local Low set
point (Low Limit).
D4
RAHIGH
Setting to ‘1’ indicates a measured Remote Temperature A higher than Remote
High set point (High Limit).
D3
RALOW
Setting to ‘1’ indicates a measured Remote Temperature A lower than Remote
Low set point (Low Limit).
D2
OPENA
Setting to ‘1’ indicates a Remote Diode 1 disconnect.
D1
RACRIT
Setting to ‘1’ indicates a Remote A Critical Temperature alarm.
D0
LCRIT
Setting to ‘1’ indicates a Local Critical Temperature alarm.
8.4
Status Register 2 (SR2)
Read Address: 17h
Write Address: Read Only
Power On Default States: 00h
BIT
FLAG NAME
DESCRIPTION
D7
Reserve
D6
Reserve
D5
Reserve
D4
RBHIGH
Setting to ‘1’ indicates a measured Remote Temperature B is higher than
Remote High set point (High Limit).
D3
RBLOW
Setting to ‘1’ indicates a measured Remote Temperature B is lower than Remote
Low set point (Low Limit).
D2
OPENB
Setting to ‘1’ indicates a Remote Diode B is disconnected.
D1
RBCRIT
Setting to ‘1’ indicates a Remote A Critical Temperature alarm.
D0
Reserve
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
8.5
Configuration Register (C1)
Read Address: 03h
Write Address: 09h
Power On Default States: 01h
BIT
FLAG NAME
DESCRIPTION
D7
ALERT mask
D6
STOP/ RUN
If this bit is set to ‘1’ ALERT interrupts are masked.
If this bit is set to ‘1’, Device is into standby mode.
D5
D4
0
No definition and this bit can be read as 0.
D3
D2
0
No definition and this bit can be read as 0.
Local T _ CRIT _ A mask
If this bit is set to ‘1’ Local T _ CRIT _ A interrupts are masked.
D1
D0
0
Reserved
No definition and this bit can be read as 0.
Reserved
8.6
Remote A T _ CRIT _ A mask If this bit is set to ‘1’ Remote A T _ CRIT _ A interrupts are masked.
Configuration Register 2 (C2)
Read Address: 18h
Write Address: 18h
Power On Default States: 00h
BIT
FLAG NAME
DESCRIPTION
D7
Reserved
D6
Reserved
D5
Reserved
D4
D3
Remote B T _ CRIT _ A mask If this bit is set to ‘1’ Remote B T _ CRIT _ A interrupts are masked.
Reserved
D2
Reserved
D1
Reserved
D0
Reserved
8.7
T_CRIT Hysteresis Register (TH)
Read Address: 21h
Write Address: 21h
Power On Default States: 0Ah
REGISTER: TH
(MAX. VALUE: 31)
BIT
D7
D6
D5
D4
D3
D2
D1
D0
VALUE
0
0
0
16
8
4
2
1
Unit: ℃
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
8.8
Conversion Rate Register (CR)
Read Address: 04h
Write Address: 0Ah
Power On Default States: 08h
REGISTER: CR (DEFAULT CONVERSION RATE: 16HZ)
(OPENA, OPENB)
(01,10)
00
11
Temp. sensor
1 local + 1remote(A or B)
2 remote + 1 local
1 local
BIT
Frequency/Time(Sec) Average IVDD
Frequency/Time(Sec) Average Frequency/Time(Sec) Average
IVDD
IVDD
00h
0.0625Hz/16
==
0.0625Hz/16
==
0.0625Hz/16
==
01h
0.125Hz/8
==
0.125Hz/8
==
0.125Hz/8
==
02h
0.25Hz/4
==
0.25Hz/4
==
0.25Hz/4
==
03h
0.5Hz/2
211uA
0.5Hz/2
211uA
0.5Hz/2
211uA
04h
1Hz/1
232uA
1Hz/1
232uA
1Hz/1
232uA
05h
2Hz/0.5
331uA
2Hz/0.5
331uA
2Hz/0.5
331uA
06h
4Hz/0.25
393uA
4Hz/0.25
393uA
4Hz/0.25
393uA
07h
8Hz/0.125
589uA
8Hz/0.125
589uA
8Hz/0.125
589uA
08h
16Hz/0.0625
833uA
16Hz/0.0625
833uA
16Hz/0.0625
833uA
09h-FFh
Reserve
Reserve
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Reserve
Publication Release Date: Jan, 2010
Revision 1.4
W83775G
8.9
Filter and Alert Configure Register (RDTFA, RDTFB)
Read Address: BFh
Write Address: BFh
Power On Default States: 00h
BIT
COMMAND
DESCRIPTION
0
No definition and can be read out to 0.
RDTFB
Filter Level
RDTFA
Filter Level
=: No Filter Selected
= or : Filter Level 1 Selected
=: Filter Level 2 Selected
=: No Filter Selected
= or : Filter Level 1 Selected
=: Filter Level 2 Selected
D0
ALERT Configure
If set to ‘1’ ALERT Output Comparator mode is enabled.
8.10 Ideality (IDEAA, IDEAB)
The Ideality factor is dependant upon the process that was used in the fabrication of the particular
diode.
Read Address: E3h (IDEAA) and E4h (IDEAB)
Write Address: E3h (IDEAA) and E4h (IDEAB)
Power On Default States: 84h
REGISTER: IDEA
(DEFAULT IDEALITY: 1.003)
BIT
RANGE
86h
0.9851~0.9924
85h
0.9925~1.0000
84h
1.0001~1.0076
83h
1.0077~1.0153
82h
1.0154~1.0232
81h
1.0233~1.0312
80h
1.0313~1.0393
7Fh
1.0394~1.0476
7Eh
1.0477~1.0560
7Dh
1.0561~1.0645
7Ch
1.0646~1.0731
7Bh
1.0732~1.0819
00h-7Ah, 87h-FFh
Reserved
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
8.11 Remote Temperature B Enable (RTBE) *for W83775G-2 only.
The remote temperature B channel of W83775G-2 is default disabled, it is used to make the design
convenience for dual core CPU and single core CPU optional on a platform.
Write 0Eh into CR[E8h] to enable the Remote Temperature B channel.
Write 0Fh into CR[E8h] to disable the Remote Temperature B channel.
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
9. ELECTRICAL CHARACTERISTIC
9.1
Absolute Maximum Ratings
PARAMETER
RATING
UNIT
Power Supply Voltage
3.3V 10%
V
Input Voltage
-0.3 to +3.6
V
Operating Temperature
-40 to +125
C
Storage Temperature
-50 to +150
C
*Guaranteed by design, 100% test at 85 degreeC.
Note: Exposure to conditions beyond those listed under Absolute Maximum Ratings may adversely affect the life and reliability
of the device.
9.2
DC Characteristics
(Ta = 0 C to 85 C, VDD = 3.3V 10%, VSS = 0V)
PARAMETER
SYM.
MIN.
TYP.
MAX.
UNIT
CONDITIONS
I/O12ts - TTL level bi-directional pin with source-sink capability of 12 mA and schmitt-trigger
level input
Input Low Threshold Voltage
Vt-
0.5
0.8
1.1
V
VDD = 3.3 V
Input High Threshold Voltage
Vt+
1.6
2.0
2.4
V
VDD = 3.3 V
Hysteresis
VTH
0.5
1.2
V
VDD = 3.3 V
Output Low Voltage
VOL
V
IOL = 12 mA
Output High Voltage
VOH
V
IOH = - 12 mA
Input High Leakage
ILIH
+10
A
VIN = VDD
Input Low Leakage
ILIL
-10
A
VIN = 0V
0.4
V
IOL = 12 mA
0.4
2.4
OD12 - Open-drain output pin with sink capability of 12 mA
Output Low Voltage
VOL
INts- TTL level Schmitt-triggered input pin
Input Low Threshold Voltage
Vt-
0.5
0.8
1.1
V
VDD = 3.3 V
Input High Threshold Voltage
Vt+
1.6
2.0
2.4
V
VDD = 3.3 V
Hysteresis
VTH
0.5
1.2
V
VDD = 3.3 V
Input High Leakage
ILIH
+10
A
VIN = VDD
Input Low Leakage
ILIL
-10
A
VIN = 0 V
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
10.AC CHARACTERISTICS
t
t
SCL
t
R
R
SCL
t
t SU;DAT
t HD;SDA
SU;STO
VALID DATA
SDA IN
t
HD;DAT
SDA OUT
Serial Bus Timing Diagram
Timing for W83775G:
PARAMETER
SYMBOL
MIN.
SCL clock period
t SCL
2.5
uS
Start condition hold time
tHD;SDA
1.5
uS
Stop condition setup-up time
tSU;STO
1
uS
DATA to SCL setup time
tSU;DAT
120
nS
DATA to SCL hold time
tHD;DAT
5
nS
SCL and SDA rise time
tR
1.0
uS
SCL and SDA fall time
tF
300
nS
-
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MAX.
UNIT
Publication Release Date: Jan, 2010
Revision 1.4
W83775G
11.TOP MARKING SPECIFICATIONS
The top markings of W83775G and W83775G-2
775G
LBA
915B
First Line
775G-2
LBA
915D
IC part number: 775G (W83775G), 775G-2 (W83775G-2)
Tracking Code 1
Second Line
L
Assembly house
BA
Mask version
Tracking Code 2
Third Line
9
The package is made in 2009
15
Week: 15
X
IC version
12.ORDERING INFORMATION
PART NUMBER
PACKAGE TYPE
PRODUCTION FLOW
SUPPLIED AS
W83775G
TSSOP-10 (MSOP-10)
Commercial, 0C to +85C
4,000 units per T&R
W83775G-2
TSSOP-10 (MSOP-10)
Commercial, 0C to +85C
4,000 units per T&R
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
13.PACKAGE DRAWING AND DIMENSIONS
MSOP (TSSOP) 10L 3X3mm2
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
14. REVISION HISTORY
VERSION
DATE
PAGE
DESCRIPTION
0.5
06/22/2007
N.A.
All versions before 0.5 are for internal use
only.
1. Modify the descriptions in Figure 7.3.1,
Figure 7.3.2, Figure 7.3.3, Figure 7.4,
Figure 7.6.1, and Figure 7.6.2.
1.0
02/20/2008
7, 9, 10, 11, 12,
14, 23, 24
2. Update the descriptions in section 7.1
and section 7.4.
3. Remove section 8.9 Beta Compensation.
4. Update the information in 9.1 Absolute
Maximum Rating.
1.1
04/24/2008
4,15-21
1.2
01/15/2009
1,16,21,22,25
1. Modify the block diagram.
2. Add power-on default state of the registers.
1. Added W83775G-2 info.
2. Modified the typo of Ideality CR[E3~E4h]
default value.
1. Modified key specifications.
1.3
10/21/2009
All
2. Modified AC specification.
3. Added application notices information.
4. Fixed the typo.
1.4
01/25/2010
1. Modify the package drawing .
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Publication Release Date: Jan, 2010
Revision 1.4
W83775G
Important Notice
Nuvoton Products are neither intended nor warranted for usage in systems or equipment, any
malfunction or failure of which may cause loss of human life, bodily injury or severe property
damage. Such applications are deemed, “Insecure Usage”.
Insecure usage includes, but is not limited to: equipment for surgical implementation, atomic
energy control instruments, airplane or spaceship instruments, the control or operation of
dynamic, brake or safety systems designed for vehicular use, traffic signal instruments, all
types of safety devices, and other applications intended to support or sustain life.
All Insecure Usage shall be made at customer’s risk, and in the event that third parties lay
claims to Nuvoton as a result of customer’s Insecure Usage, customer shall indemnify the
damages and liabilities thus incurred by Nuvoton.
- 28 -
Publication Release Date: Jan, 2010
Revision 1.4
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