f75367 Feature Integration Technology Inc., f75367 Datasheet - Page 7

• Manufacturer Part Number: f75367
• Description: Temperature Sensor With I2c-sst Bridge
• Manufacturer: Feature Integration Technology Inc.

6. Function Description
6.1 Access Interface
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4
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The F75367 is a temperature sensor IC with ß compensation and supports I2C to SST Master Bridge
function. This chip provides 2-remote temperature sensors, 1-local temperature sensor and 6-external
remote temperature input (external devices) by SST Master. The local temperature sensor can be
applied to sense environment temperature without any component. The 2 remote temperature sensors
can be performed by CPU thermal diode or transistor 2N3906. The F75367 supports new generational
45nm CPU temperature sensing by varied ß of CPU. Besides 3 temperature sensors, the F75367 also
can read 6 temperature inputs from other devices by SST interfaces. The host can read the extra 6 sets
temperature by I2C interface (I2C to SST Master Bridge). Totally the F75367 can support 9 temperature
outputs for host fan control by I2C.
The F75367 can be connected to a compatible 2-wire serial system management bus as a slave device
under the control of the master device, using two device terminals SCL and SDA. The F75367 supports
I2C protocol of, “Write Byte”, “Read Byte”, both with or without Packet Error checking (PEC) which is
calculated using CRC-8. For detail information about PEC, please check I2C specification. F75367 also
supports Alert Response Address (ARA) protocol.
The operation of the protocol is described with details in the following sections.
(a)
I2C write to internal address register followed by the data byte
D-
D2+
SCLK_S
SDATA_S
AGND
AOUT
AIN
IN
IN
ts5V
ts5V
/OD
12
Negative connection to remote temperature sensor
Positive connection to remote temperature sensor
Slave serial bus clock
Slave serial bus data
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F75367
Feb..
V0.11P
, 2008