W83627EHF_0611 Datasheet, PDF (31/144 Pages) Winbond – WINBOND LPC I/O

W83627EHF/EF, W83627EHG/EG
6.2.2 I²C interface
The second interface uses I²C Serial Bus. W83627EHF/EHG has a programmable serial bus address.
It defined at Index 48h.
6.2.2.1. Serial bus (I²C) access timing
(a) Serial bus write to internal address register followed by the data byte
0
780
SCL
78
SDA
0
Start By
Master
10110
Frame 1
Serial Bus Address Byte
SCL (Continued)
1 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Ack
by
627EHF
Frame 2
Internal Index Register Byte
Ack
by
627EHF
0
78
SDA (Continued)
D7 D6 D5 D4 D3 D2 D1 D0
Frame 3
Data Byte
AAckck
byby
768247REHF
Stop
by
Master
Figure 1. Serial Bus Write to Internal Address Register followed by the Data Byte
(b) Serial bus read from a register
0
SCL
SDA
0
Start By
Master
10110
Frame 1
Serial Bus Address Byte
0
780
78
1 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Ack
by
627EHF
Frame 2
Internal Index Register Byte
Ack
by
627EHF
0
780
78
0
Repeat
start
by
Master
10110
Frame 3
Serial Bus Address Byte
1 R/W
D7 D6 D5 D4 D3 D2 D1 D0
Ack
by
627EHF
Frame 4
Data Byte
Ack
by
Master
Stop by
Master
0
Figure 2. Serial Bus Read from Internal Address Register
6.3 Analog Inputs
The maximum input voltage of the analog pin is 2.048V because the 8-bit ADC has a 8mV LSB. Really,
the application of the PC monitoring would most often be connected to power suppliers. The CPU
Vcore voltage , battery(pin 74), 3VSB(pin 61), 3VCC(pin 12) , AVCC(pin 114) voltage can directly
connected to these analog inputs. The +12V voltage inputs should be reduced a factor with external
resistors so as to obtain the input range. As Figure 6.2 shows.
- 25 -
Publication Release Date: Nov. 2006
Revision 1.3