STMPE1600QTR STMicroelectronics, STMPE1600QTR Datasheet - Page 10

• Manufacturer Part Number: STMPE1600QTR
• Description: IC EXPANDER 16BIT 24QFN
• Manufacturer: STMicroelectronics
• Series: Xpander Logic™r

Specifications of STMPE1600QTR

• Interface: I²C
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 1.65 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Surface Mount
• Package / Case: *
• Includes: POR
• Memory Size: 16 bit
• Interface Type: I2C
• Maximum Clock Frequency: 400 KHz
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 1.65 V
• Maximum Operating Current: 500 uA
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 497-10665-2

I2C features
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Read operation
A write is first performed to load the register address into the Address Counter but without
sending a Stop condition. Then, the bus master sends a reStart condition and repeats the
Device Address with the R/W bit set to 1. The slave device acknowledges and outputs the
content of the addressed byte. If no more data is to be read, the bus master must not
acknowledge the byte and terminates the transfer with a Stop condition. If the bus master
acknowledges the data byte, then it can continue to perform the data reading. To terminate
the stream of data byte, the bus master must not acknowledge the last output byte and
follow by a Stop condition. If the address of the register written into the Address Counter
falls within the range of addresses that has the auto-increment function, the data being read
will be coming from consecutive addresses, with the internal Address Counter automatically
increments after each byte output. After the last memory address, the Address Counter
'rolls-over' and the device continue to output data from the memory address of 0x00.
Similarly, for the address of register that falls within non-increment range of addresses, the
output data byte comes from the same address (which is the address pointed by the
Address Counter).
Acknowledgement in read operation
For the above read command, the slave device waits, after each byte read, for an
acknowledgement during the ninth bit time. If the bus master does not drive the SDA to low
state, then the slave device terminates and switches back to its idle mode, waiting for the
next command.
Write operations
A write is first performed to load the register address into the Address Counter without
sending a Stop condition. After the bus master receives an acknowledgement from the slave
device, it may start to send a data byte to the register (pointed by the Address Counter). The
slave device again acknowledges and the bus master terminates the transfer with a Stop
condition. If the bus master would like to continue to write more data, it can just continue
write operation without issuing the Stop condition. Whether the Address Counter auto
increments or not after each data byte write, depends on the address of the register written
into the Address Counter. After the bus master writes the last data byte and the slave device
acknowledges the receipt of the last data, the bus master may terminate the write operation
by sending a Stop condition. When the Address Counter reaches the last memory address,
it 'rolls-over' on the next data byte write.
General call
A general call address is a transaction with the slave address of 0x00 and R/W = 0. When a
general call address is made, the device responds to this transaction with an
acknowledgement and behaves as a slave-receiver mode. The meaning of a general call
address is defined in the second byte sent by the master-transmitter.
Doc ID 16938 Rev 1
STMPE1600