PCA9541D/03,118 NXP Semiconductors, PCA9541D/03,118 Datasheet - Page 21

• Manufacturer Part Number: PCA9541D/03,118
• Description: IC I2C 2:1 SELECTOR 16-SOIC
• Manufacturer: NXP Semiconductors

Specifications of PCA9541D/03,118

• Applications: 2-Channel I²C Multiplexer
• Interface: I²C, SMBus
• Voltage - Supply: 2.3 V ~ 5.5 V
• Package / Case: 16-SOIC (3.9mm Width)
• Mounting Type: Surface Mount
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 568-1851-2; 935273317118; PCA9541D/03-T

NXP Semiconductors
PCA9541_7
Product data sheet
Fig 13. Write to the Interrupt Enable and Control registers using the Auto-Increment (AI) bit
Fig 14. Read the 3 registers using the Auto-Increment (AI) bit
(1) xx = 00: Interrupt Enable register
(2) xx = 00: Control register
(3) xx = 00: INT register
xx = 01: Control register
xx = 10: INT register
xx = 01: INT register
xx = 10: Interrupt Enable register
xx = 01: Interrupt Enable register
xx = 10: Control register
S
START condition
1 1 1 A3 A2 A1 A0 0
slave address
9.5 Bus transactions
S
START condition
1 1 1 A3 A2 A1 A0 0
Remark: If a third data byte is sent, it will not be acknowledged by the PCA9541.
Remark: If a fourth data byte is read, the first register will be accessed.
acknowledge
slave address
from slave
R/W
A
(1)
acknowledge
0 0 0 1 0 0 0 0
from slave
command code register
R/W
A
auto
increment
A
0 0 0 1 0 0 x x
acknowledge
from master
command code register
increment
access to register
Rev. 07 — 2 July 2009
xx = 00, 01, or 10
2-to-1 I
auto
A
acknowledge
from slave
(2)
acknowledge
2
C-bus master selector with interrupt logic and reset
from slave
Interrupt Enable (IE)
register
A
data
Sr
A
acknowledge
from master
re-START
condition
1 1 1 A3 A2 A1 A0 1
slave address
A
acknowledge
from slave
(3)
no acknowledge
acknowledge
from master
data control register
from slave
002aab608
(CONTROL)
R/W
condition
STOP
A
A
acknowledge
P
from slave
PCA9541
© NXP B.V. 2009. All rights reserved.
002aab607
condition
STOP
A
P
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