ASC7621 查看數據表（PDF） - Unspecified
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ASC7621 Datasheet PDF : 50 Pages
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aSC7621
Note: The following figures assume that Device Address 2Ch has been chosen by the user via address selection.
1
91
9
SCL
SDA S 0 1 0 1 1 0 0 R/W A A7 A6 A5 A4 A3 A2 A1 A0 A
Start
ACK
SMBus
Device
Address
Byte
(2Ch)
from
aSC7621
ACK Stop
Register Address Byte
from By
aSC7621 Master
Figure 2 Register Address Pointer Set
1
91
91
9
SCL
SDA S 0 1 0 1 1
0 0 R/W A A7 A6 A5 A4 A3 A2 A1 A0 A D7 D6 D5 D4 D3 D2 D1 D0 A
Start
ACK
SMBus
Device
Address
Byte
(2Ch)
from
aSC7621
Register Address Byte
ACK
from
aSC7621
Register Data Byte
ACK Stop
from by
aSC7621 Master
Figure 3 Register Write
Register Address
Pointer Set
(Figure 2.)
+
without stop by Master
1
91
9
S 01 0 1 1
0 0 R/W A D7 D6 D5 D4 D3 D2 D1 D0 N
Re-start
ACK
SMBus
Device
Address
Byte
(2Ch)
from
aSC7621
Register Data Byte
NACK Stop
from by
Master Master
Figure 4 Register Read
1
91
9
SCL
SDA S 0 1 0 1 1 0 0 R/W A D7 D6 D5 D4 D3 D2 D1 D0 N
Start
ACK
SMBus
Device
Address
Byte
(2Ch)
from
aSC7621
Register Data Byte
NACK Stop
from by
Master Master
Figure 5 Register Read When Read Address Already Set
© Andigilog, Inc. 2006
- 10 -
www.andigilog.com
October 2006 - 70A06010
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