f75375 Feature Integration Technology Inc., f75375 Datasheet - Page 11

• Manufacturer Part Number: f75375
• Description: Fintek Hardware Monitor Ic Datasheet
• Manufacturer: Feature Integration Technology Inc.

6.2 Access Interface
Serial Bus is configurable by using power-on trapping. The pin 3 (PWMOUT1/ADDR_TRAP) is multi-function pin.
During power-on, this pin serves as input detection of logic high or logic low. This pin is default pull-down resistor with
100K ohms mapping the Serial Bus address 0x5A (0101_1010). Another Serial Bus address 0x5C (0101_1100) is
set when external pull-up resistor with 10K ohms is connected in this pin.
(a)
(b)
The F75375S provides one serial access interface, Serial Bus, to read/write internal registers. The address of
Serial bus write to internal address register followed by the data byte
SCL
SDA
Serial bus read form internal address register followed by the data byte
Fintek
Typical BJT
Connection
Start By
Master
Voltage Inputs
0
0
20K, 1%
Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte
1
Serial Bus Address Byte
0
2N3906
SCL
SDA (Continued)
Frame 1
VIN (Lower than 2.0V)
VIN(Higher than
1
(Continued)
3VCC
1
0
R
1
10K, 1%
R THM
10K, 25 C
(directly connect to the chip)
R/W
(directly connect to the chip)
7
0
D7
R1
Figure 5-3
375S
Ack
5
by
8
D6
Typical Thermister
Connection
VIN1(Max2.0V)
0
D7
D5
R2
Feature Integration Technology Inc.
Pin 14 or 15
D6
D4
VREF
Internal Index Register Byte
D5
D3
Data Byte
Frame 3
Frame 2
Pin 13
D4
D2
F75375S/F75375SG
D3
D1
50K
7.8125 mV LSB
D2
7
D0
50K
8-bit ADC
with
D1
8
VIN3.3
7
D0
Master
Stop
375S
by
Ack
by
8
July 2007
V0.26P