PCAL6416AEVJ NXP Semiconductors, PCAL6416AEVJ Datasheet - Page 20

• Manufacturer Part Number: PCAL6416AEVJ
• Description: Interface - I/O Expanders 16bit I2C/SMBus IO Expander w/Interrupt
• Manufacturer: NXP Semiconductors

Specifications of PCAL6416AEVJ

• Maximum Operating Frequency: 100 kHz
• Operating Supply Voltage: 1.65 V to 5.5 V
• Operating Temperature Range: - 40 C to + 85 C
• Mounting Style: SMD/SMT
• Package / Case: VFBGA-24
• Operating Current: 200 mA
• Output Current: 25 mA
• Product Type: I/O Expanders

NXP Semiconductors
PCAL6416A
Product data sheet
Fig 13. Read from device registers
8.2 Read commands
To read data from the PCAL6416A, the bus master must first send the PCAL6416A
address with the least significant bit set to a logic 0 (see
The command byte is sent after the address and determines which register is to be
accessed.
After a restart, the device address is sent again, but this time the least significant bit is set
to a logic 1. Data from the register defined by the command byte is sent by the
PCAL6416A (see
edge of the ACK clock pulse. After the first byte is read, additional bytes may be read, but
the data now reflects the information in the other register in the pair. For example, if
Input Port 1 is read, the next byte read is Input Port 0.There is no limit on the number of
data bytes received in one read transmission, but on the final byte received the bus
master must not acknowledge the data.
After a subsequent restart, the command byte contains the value of the next register to be
read in the pair. For example, if Input Port 1 was read last before the restart, the register
that is read after the restart is the Input Port 0.
All information provided in this document is subject to legal disclaimers.
Figure 13
Rev. 3 — 24 December 2012
Low-voltage translating 16-bit I
and
Figure
16). Data is clocked into the register on the rising
Figure 8
2
C-bus/SMBus I/O expander
PCAL6416A
for device address).
© NXP B.V. 2012. All rights reserved.
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