PCA9555D/G-T NXP Semiconductors, PCA9555D/G-T Datasheet - Page 13

• Manufacturer Part Number: PCA9555D/G-T
• Description: IC I/O EXPANDER I2C 16B 24SOIC
• Manufacturer: NXP Semiconductors
• Series: -r

Specifications of PCA9555D/G-T

• Interface: I²C, SMBus
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 2.3 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: 24-SOIC (0.295", 7.50mm Width)
• Includes: POR
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 568-1754-1

Fig 14. Read Input port register, scenario 2
data into port 0
data into port 1
SDA
read from port 0
read from port 1
INT
SCL
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