MCP23S18T-E/SO Microchip Technology, MCP23S18T-E/SO Datasheet - Page 21

• Manufacturer Part Number: MCP23S18T-E/SO
• Description: 16-bit Input/Output Expander, I2C Interface, Pb-free 28 SOIC .300in T/R
• Manufacturer: Microchip Technology

Specifications of MCP23S18T-E/SO

• Interface: SPI
• Number Of I /o: 16
• Interrupt Output: Yes
• Frequency - Clock: 10MHz
• Voltage - Supply: 1.8 V ~ 5.5 V
• Operating Temperature: -40°C ~ 125°C
• Mounting Type: Surface Mount
• Package / Case: 28-SOIC (7.5mm Width)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant

1.6.4
The default comparison value is configured in the
DEFVAL register. If enabled (via GPINTEN and INT-
CON) to compare against the DEFVAL register, an
opposite value on the associated pin will cause an
interrupt to occur.
REGISTER 1-6:
© 2008 Microchip Technology Inc.
bit 7
Legend:
R = Readable bit
-n = Value at POR
bit 7-0
R/W-0
DEF7
DEFAULT COMPARE REGISTER
FOR INTERRUPT-ON-CHANGE
DEF7:DEF0: Sets the compare value for pins configured for interrupt-on-change from defaults <7:0>.
Refer to INTCON.
If the associated pin level is the opposite from the register bit, an interrupt occurs.
Refer to INTCON and GPINTEN.
R/W-0
DEF6
DEFVAL – DEFAULT VALUE REGISTER
W = Writable bit
‘1’ = Bit is set
R/W-0
DEF5
R/W-0
DEF4
‘0’ = Bit is cleared
U = Unimplemented bit, read as ‘0’
MCP23018/MCP23S18
R/W-0
DEF3
R/W-0
DEF2
x = Bit is unknown
R/W-0
DEF1
DS22103A-page 21
R/W-0
DEF0
bit 0