MCP23016-I/SP Microchip Technology, MCP23016-I/SP Datasheet - Page 13

• Manufacturer Part Number: MCP23016-I/SP
• Description: IC I/O EXPANDER I2C 16B 28SDIP
• Manufacturer: Microchip Technology

Specifications of MCP23016-I/SP

• Package / Case: 28-DIP (0.300", 7.62mm)
• Interface: I²C
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 400kHz
• Voltage - Supply: 2 V ~ 5.5 V
• Operating Temperature: -40°C ~ 85°C
• Mounting Type: Through Hole
• Includes: POR
• Logic Family: MCP23016
• Propagation Delay Time: 50 ns
• Operating Supply Voltage: 2 V to 5.5 V
• Power Dissipation: 1 W
• Operating Temperature Range: - 40 C to + 85 C
• Input Voltage: 4.5 V to 5.5 V
• Logic Type: I/O Expander
• Maximum Clock Frequency: 400 KHz
• Maximum Operating Frequency: 3.4 MHz
• Mounting Style: Through Hole
• Output Current: 25 mA
• Output Voltage: 4.5 V
• Chip Configuration: 16 Bit
• Bus Frequency: 400kHz
• Ic Interface Type: I2C
• No. Of I/o's: 16
• Supply Voltage Range: 2V To 5.5V
• Digital Ic Case Style: DIP
• No. Of Pins: 28
• Ic Function: I/O Expander
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant

1.9.2
To write to a MCP23016 register, the Master I
needs to follow the requirements, as illustrated in
Figure 1-3. First, the device is selected by sending the
slave address and setting the R/W bit to logic ‘0’. The
command byte is sent after the address and
determines which register will be written. Table 1-3
shows the relationship of the command byte and
register.
The MCP23016 has twelve 8-bit registers. They are
configured to operate as six 16-bit register pairs,
supporting the device’s 16-bit port. These pairs are
formed based on their functions (e.g., GP0 and GP1
are grouped together). The I
register pair to provide faster access. The first data byte
following a command byte is written into the register
pointed to by the command byte, while the second data
is written into another register in the same pair. For
example, if the first byte is sent to OLAT1 (command
byte 03h), the next data byte will be written into the sec-
ond register of that pair, OLAT0. If the first byte is writ-
ten to OLAT0 (command byte 02h), the second byte
will be written to OLAT1.
There is no limitation on the number of data bytes in
one write transmission. Figure 1-4 shows the case of
multiple byte writes in one write operation. In this case,
the multiple writes are made to the same data pair.
© 2007 Microchip Technology Inc.
Note:
WRITING THE REGISTERS
The bus must remain free until after the
ninth clock pulse for a minimum of 12 µs
(see Table 2-5 and Figure 2-4).
2
C commands apply to one
2
C device
FIGURE 1-3:
WRITE TO CONFIGURATION
REGISTERS (CASE 1)
MCP23016
DS20090C-page 13