pca9535d NXP Semiconductors, pca9535d Datasheet - Page 13

• Manufacturer Part Number: pca9535d
• Description: 16-bit I2c And Smbus, Low Power I/o Port With Interrupt
• Manufacturer: NXP Semiconductors

Fig 12. Read Input Port register, scenario 2
SDA
read from port 0
data into port 0
read from port 1
data into port 1
SCL
INT
S
START condition
Remark: 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 register).
1
0
2
1
t
v(INT_N)
slave address
3
0
4
0 A2 A1 A0 1
5
6
acknowledge
from slave
DATA 00
7
R/W
8
9
A
DATA 10
t
rst(INT_N)
t
h(D)
DATA 00
I0.x
DATA 01
acknowledge
from master
A
t
h(D)
DATA 10
DATA 02
I1.x
t
acknowledge
su(D)
from master
DATA 11
A
A
DATA 03
DATA 03
I0.x
t
su(D)
acknowledge
from master
A
DATA 12
DATA 12
I1.x
non acknowledge
from master
STOP condition
002aac224
1
P