參數(shù)資料
型號: CAP1028-1-BP-TR
廠商: STANDARD MICROSYSTEMS CORP
元件分類: 模擬信號調(diào)理
英文描述: SPECIALTY ANALOG CIRCUIT, QCC20
封裝: 4 X 4 MM, ROHS COMPLAINT, QFN-20
文件頁數(shù): 9/69頁
文件大?。?/td> 948K
代理商: CAP1028-1-BP-TR
8 Channel Capacitive Touch Sensor with 2 LED Drivers
Datasheet
SMSC CAP1028
17
Revision 1.0 (06-16-09)
DATASHEET
APPLICATION NOTE: When using the Block Write protocol, the internal address pointer will be automatically
incremented after every data byte is received. It will wrap from FFh to 00h.
3.3.3
SMBus Read Byte
The Read Byte protocol is used to read one byte of data from the registers as shown in Table 3.5.
3.3.4
Block Read
The Block Read is used to read multiple data bytes from a group of contiguous registers as shown in
Table 3.6. It is an extension of the Read Byte Protocol.
APPLICATION NOTE: When using the Block Read protocol, the internal address pointer will be automatically
incremented after every data byte is received. It will wrap from FFh to 00h.
3.3.5
SMBus Send Byte
The Send Byte protocol is used to set the internal address register pointer to the correct address
location. No data is transferred during the Send Byte protocol as shown in Table 3.7.
Table 3.4 Block Write Protocol
START
SLAVE
ADDRESS
WR
ACK
REGISTER
ADDRESS
ACK
REGISTER
DATA
ACK
1 ->0
YYYY_YYY
0
XXh
0
XXh
0
REGISTER
DATA
ACK
REGISTER
DATA
ACK
. . .
REGISTER
DATA
ACK
STOP
XXh
0
XXh
0
. . .
XXh
0
0 -> 1
Table 3.5 Read Byte Protocol
START
SLAVE
ADDRESS
WR
ACK
REGISTER
ADDRESS
ACK
START
CLIENT
ADDRESS
RD
ACK
REGISTER
DATA
NACK
STOP
1->0
YYYY_YYY
0
XXh
0
1 ->0
YYYY_YYY
1
0
XXh
1
0 -> 1
Table 3.6 Block Read Protocol
START
SLAVE
ADDRESS
WR
ACK
REGISTER
ADDRESS
ACK
START
SLAVE
ADDRESS
RD
ACK
REGISTER
DATA
1->0
YYYY_YYY
0
XXh
0
1 ->0
YYYY_YYY
1
0
XXh
ACK
REGISTER
DATA
ACK
REGISTER
DATA
ACK
REGISTER
DATA
ACK
. . .
REGISTER
DATA
NACK
STOP
0
XXh
0
XXh
0
XXh
0
. . .
XXh
1
0 -> 1
Table 3.7 Send Byte Protocol
START
SLAVE
ADDRESS
WR
ACK
REGISTER
ADDRESS
ACK
STOP
1 -> 0
YYYY_YYY
0
XXh
0
0 -> 1
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