f75395 Feature Integration Technology Inc., f75395 Datasheet - Page 9

• Manufacturer Part Number: f75395
• Description: ?1o C Temperature Sensor With ? Compensation
• Manufacturer: Feature Integration Technology Inc.

6.4 Temperature Monitoring
F75395
The F75395 provides SMBus address option function. Pull high register (Alert Pin) to select SMBus address by power on strapping
and entry key writing. These two conditions must be done both for address selection. If you only option pull high register without
entry key writing, the address will keep default value 98h. For example, use 30k resistor for address 6A selection. User need to
write entry key to register CRFAh.
The F75395 also support SST interface for PC system of Intel platform. The system can read temperature and related information by
SST interface. The F75395 can be read by Intel chipset SST interface. (Direct connect chipset pin SST to the pin SST of F75395). .
About more detail, please refer Intel SST Spec. document (Protocol is edited by Intel).
The F75395 monitors a local and a remote temperature sensor. Both can be measured from -40°C to 127.875°C.
The temperature format is as the following table:
SCL
SDA
Temperature ( High Byte )
Start By
Master
100°C
127°C
-40°C
-20°C
50°C
75°C
-1°C
0°C
0
0
0
Figure 4. Alert Response Address
Alert Response Address
0
Frame 1
1
Ex: Original chip default address is 98h
After Entry Key writing, Chip address will change to 6Ah.
Digital Output
1
0000 0000
1101 1000
0011 0010
0100 1011
0110 0100
1110 1100
1111 1111
0111 1111
Bus Access Byte Write (98, FA, 19)
Bus Access Byte Write (98, FA, 34)
Bus Access Byte Write (98, FA, 01)
0
0
R/W
0
7
-5-
Ack
395
by
Temperature ( Low Byte )
8
0
0
-0.875°C
-0.325°C
-0.125°C
0.375°C
0.500°C
0.750°C
0.875°C
1
0°C
0
Device Address
0
Frame 2
1
1
Digital Output
001 0 0000
110 0 0000
000 0 0000
011 0 0000
100 0 0000
110 0 0000
111 0 0000
111 0 0000
0
7
0
Master
Ack
by
8
F75395
Stop by
Master
May, 2008
V0.15P