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G771 Datasheet(PDF) 12 Page - Global Mixed-mode Technology Inc

Part No. G771
Description  Two Remote Temperature Sensors with SMBus Serial Interface and System Reset Circuit
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Maker  GMT [Global Mixed-mode Technology Inc]
Homepage  http://www.gmt.com.tw
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G771 Datasheet(HTML) 12 Page - Global Mixed-mode Technology Inc

 
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Ver: 0.2 Preliminary
Dec 11, 2001
TEL: 886-3-5788833
http://www.gmt.com.tw
12
G771
Global Mixed-mode Technology Inc.
Table 7. Status-Byte Bit Assignments
BIT
NAME
FUNCTION
7(MSB)
BUSY
A high indicates that the ADC is busy converting.
6
RHIGH2*
A high indicates that the 2
nd diode high-temperature alarm has activated.
5
RLOW2*
A high indicates that the 2
nd diode low-temperature alarm has activated.
4
RHIGH1*
A high indicates that the 1
st diode high-temperature alarm has activated.
3
RLOW1*
A high indicates that the 1
st diode low-temperature alarm has activated.
2
OPEN*
A high indicates a remote-diode continuity (open-circuit) fault.
1
RFU
Reserved for future use (returns 0)
0(LSB)
RFU
Reserved for future use (returns 0)
*These flags stay high until cleared by POR, or until the status byte register is read.
Table 8. Conversion-Rate Control Byte
DATA
CONVERSION
RATE (Hz)
Temperature Sensor Average
Supply Current (µA TYP, at Vcc = 5V)
00h
0.0625
30
01h
0.125
33
02h
0.25
35
03h
0.5
48
04h
1
70
05h
2
128
06h
4
225
07h
8
425
08h to FFh
RFU
-
Table 9. RLTS and RRTE Temp Register Update Timing Chart
OPERATING
MODE
CONVERSION
INITIATED BY:
NEW CONVERSION RATE
(CHANGED VIA WRITE TO CRW)
TIME UNTIL RLTS AND
RRTE ARE UPDATED
Auto-Convert
Power-on reset
N/A (0.25Hz)
156ms max
Auto-Convert
1-shot command, while idling
between automatic conversions
N/A
156ms max
Auto-Convert
1-shot command that occurs
during a conversion
N/A
When current conversion is
complete (1-shot is ignored)
Auto-Convert
Rate timer
0.0625Hz
20sec
Auto-Convert
Rate timer
0.125Hz
10sec
Auto-Convert
Rate timer
0.25Hz
5sec
Auto-Convert
Rate timer
0.5Hz
2.5sec
Auto-Convert
Rate timer
1Hz
1.25sec
Auto-Convert
Rate timer
2Hz
625ms
Auto-Convert
Rate timer
4Hz
312.5ms
Auto-Convert
Rate timer
8Hz
237.5ms
Software Standby RUN/STOP bit
N/A
156ms
Software Standby 1-shot command
N/A
156ms


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