Datasheet
Table Of Contents
- Features
- CMOS Technology
- Packages
- Package Types
- Block Diagram
- 1.0 Device OvervieW
- 1.1 Pin Descriptions
- 1.2 Power-on Reset (POR)
- 1.3 Power-up Timer (PWRT)
- 1.4 Clock Generator
- 1.5 I2C Bus Interface/ Protocol Handler
- 1.6 Address Decoder
- 1.7 Register Block
- 1.8 Serializer/Deserializer
- 1.9 Interrupt Logic
- 2.0 Electrical Characteristics
- 2.1 DC Characteristics
- TABLE 2-1: DC Characteristics
- FIGURE 2-1: respOnse time
- TABLE 2-2: response time
- FIGURE 2-2: TEST POINT Clock Timing
- TABLE 2-3: TEST POINT Clock Timing
- TABLE 2-4: Power-up Timer Requirements
- FIGURE 2-3: I2C Bus Start/Stop Bits Timing
- FIGURE 2-4: I2C Bus Data Timing
- TABLE 2-5: I2C Bus Data Requirements
- FIGURE 2-5: GP0 and GP1 POrt Timings
- 2.1 DC Characteristics
- 3.0 Package InFormation
- Appendix A: Revision History
- Product Identification System
- Worldwide Sales and Service
MCP23016
DS20090C-page 10 © 2007 Microchip Technology Inc.
1.7.5 INTERRUPT CAPTURE REGISTERS
Two registers contain the value of the port that
generated the interrupt:
• INTCAP0 contains the value of GP0 at time of
GP0 change interrupt
• INTCAP1 contains the value of GP1 at time of
GP1 change interrupt
These registers are ‘read-only’ registers (A write to
these registers is ignored).
REGISTER 1-9: INTCAP0 - INTERRUPT CAPTURED VALUE FOR PORT REGISTER 0
REGISTER 1-10: INTCAP1 - INTERRUPT CAPTURED VALUE FOR PORT REGISTER 1
R-x R-x R-x R-x R-x R-x R-x R-x
ICP0.7 ICP0.6 ICP0.5 ICP0.4 ICP0.3 ICP0.2 ICP0.1 ICP0.0
bit 7 bit 0
bit 7-0
ICP0.0:ICP0.7: Reflects the logic level on the GP0 pins at the time of interrupt due to pin
change
1 = Logic ‘1’
0 = Logic ‘0’
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown
R-x R-x R-x R-x R-x R-x R-x R-x
ICP1.7 ICP1.6 ICP1.5 ICP1.4 ICP1.3 ICP1.2 ICP1.1 ICP1.0
bit 7 bit 0
bit 7-0
ICP1.0:ICP1.7: Reflects the logic level on the GP1 pins at the time of interrupt due to pin
change
1 = Logic ‘1’
0 = Logic ‘0’
Legend:
R = Readable bit W = Writable bit U = Unimplemented bit, read as ‘0’
- n = Value at POR ‘1’ = Bit is set ‘0’ = Bit is cleared x = Bit is unknown