F75395

F75395

May, 2008

V0.15P

-5-

0

Start By

Master

0

0011

00

01

001100

Ack

by

Master

R/W

Ack

by

395

SCL

SDA

78

0

7

8

0

Frame 2

Device Address

Frame 1

Alert Response Address

Figure 4. Alert Response Address

Stop by

Master

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.

Ex: Original chip default address is 98h

Bus Access Byte Write (98, FA, 19)

Bus Access Byte Write (98, FA, 34)

Bus Access Byte Write (98, FA, 01)

After Entry Key writing, Chip address will change to 6Ah.

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).

6.4

Temperature Monitoring

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:

Temperature ( High Byte )

Digital Output

Temperature ( Low Byte )

Digital Output

-40°C

1101 1000

-0.875°C

001 0 0000

-20°C

1110 1100

-0.325°C

110 0 0000

-1°C

1111 1111

-0.125°C

111 0 0000

0°C

0000 0000

0°C

000 0 0000

50°C

0011 0010

0.375°C

011 0 0000

75°C

0100 1011

0.500°C

100 0 0000

100°C

0110 0100

0.750°C

110 0 0000

127°C

0111 1111

0.875°C

111 0 0000