參數(shù)資料
型號(hào): 9535
廠商: NXP Semiconductors N.V.
英文描述: 16-bit I2C and SMBus, low power I/O port with interrupt
中文描述: 16位I2C和SMBus,低功率的I / O端口中斷
文件頁(yè)數(shù): 8/19頁(yè)
文件大?。?/td> 139K
代理商: 9535
P
P
P
1
2
C
2
1
0
A2
A1 A0
0
0
0
0
A2
A1
A0
0
1
S
0
A
A
A
COMMAND BYTE
acknowledge
from slave
R/W
acknowledge
from slave
A
P
NA
acknowledge
from slave
acknowledge
from master
S
DATA
DATA
R/W
first byte
at this moment master-transmitter
becomes master-receiver and
slave-receiver becomes
slave-transmitter
last byte
SU01463
no acknowledge
from master
1
slave address
data from upper
or lower byte of
register
data from lower
or upper byte
of register
slave address
MSB
LSB
MSB
LSB
NOTE:
Transfer can be stopped at any time by a STOP condition.
Figure 8.
READ from register
1
2
3
4
5
6
7
8
9
S
0
1
0
0
A2
A1
A0
1
A
7
6
5
4
3
2
1
0
A
I0.x
7
6
5
4
3
2
1
0
A
I1.x
7
6
5
4
3
2
1
0
A
I0.x
7
6
5
4
3
2
1
0
1
I1.x
P
R/W
ACKNOWLEDGE
FROM SLAVE
SCL
SDA
ACKNOWLEDGE
FROM MASTER
ACKNOWLEDGE
FROM MASTER
ACKNOWLEDGE
FROM MASTER
NON ACKNOWLEDGE
FROM MASTER
READ FROM PORT 0
DATA INTO PORT 0
READ FROM PORT 1
DATA INTO PORT 1
INT
t
IR
t
IV
SU01464
NOTES:
Transfer of data can be stopped at any moment by a STOP condition. When this occurs, data present at the latest acknowledge phase is valid (output mode).
It is assumed that the command byte has previously been set to 00 (read input port port register).
Figure 9.
READ input port register
scenario 1
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