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MCP23S17T-E/SP Datasheet(PDF) 10 Page - Microchip Technology |
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MCP23S17T-E/SP Datasheet(HTML) 10 Page - Microchip Technology |
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10 / 48 page  MCP23017/MCP23S17 DS21952B-page 10 © 2007 Microchip Technology Inc. 1.6 Configuration and Control Registers There are 21 registers associated with the MCP23X17, as shown in Table 1-5 and Table 1-6. The two tables show the register mapping with the two BANK bit values. Ten registers are associated with PortA and ten are associated with PortB. One register (IOCON) is shared between the two ports. The PortA registers are identical to the PortB registers, therefore, they will be referred to without differentiating between the port designation (i.e., they will not have the “A” or “B” designator assigned) in the register tables. TABLE 1-5: CONTROL REGISTER SUMMARY (IOCON.BANK = 1) Register Name Address (hex) bit 7 bit 6 bit 5 bit 4 bit 3 bit 2 bit 1 bit 0 POR/RST value IODIRA 00 IO7 IO6 IO5 IO4 IO3 IO2 IO1 IO0 1111 1111 IPOLA 01 IP7 IP6 IP5 IP4 IP3 IP2 IP1 IP0 0000 0000 GPINTENA 02 GPINT7 GPINT6 GPINT5 GPINT4 GPINT3 GPINT2 GPINT1 GPINT0 0000 0000 DEFVALA 03 DEF7 DEF6 DEF5 DEF4 DEF3 DEF2 DEF1 DEF0 0000 0000 INTCONA 04 IOC7 IOC6 IOC5 IOC4 IOC3 IOC2 IOC1 IOC0 0000 0000 IOCON 05 BANK MIRROR SEQOP DISSLW HAEN ODR INTPOL — 0000 0000 GPPUA 06 PU7 PU6 PU5 PU4 PU3 PU2 PU1 PU0 0000 0000 INTFA 07 INT7 INT6 INT5 INT4 INT3 INT2 INT1 INTO 0000 0000 INTCAPA 08 ICP7 ICP6 ICP5 ICP4 ICP3 ICP2 ICP1 ICP0 0000 0000 GPIOA 09 GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0 0000 0000 OLATA 0A OL7 OL6 OL5 OL4 OL3 OL2 OL1 OL0 0000 0000 IODIRB 10 IO7 IO6 IO5 IO4 IO3 IO2 IO1 IO0 1111 1111 IPOLB 11 IP7 IP6 IP5 IP4 IP3 IP2 IP1 IP0 0000 0000 GPINTENB 12 GPINT7 GPINT6 GPINT5 GPINT4 GPINT3 GPINT2 GPINT1 GPINT0 0000 0000 DEFVALB 13 DEF7 DEF6 DEF5 DEF4 DEF3 DEF2 DEF1 DEF0 0000 0000 INTCONB 14 IOC7 IOC6 IOC5 IOC4 IOC3 IOC2 IOC1 IOC0 0000 0000 IOCON 15 BANK MIRROR SEQOP DISSLW HAEN ODR INTPOL — 0000 0000 GPPUB 16 PU7 PU6 PU5 PU4 PU3 PU2 PU1 PU0 0000 0000 INTFB 17 INT7 INT6 INT5 INT4 INT3 INT2 INT1 INTO 0000 0000 INTCAPB 18 ICP7 ICP6 ICP5 ICP4 ICP3 ICP2 ICP1 ICP0 0000 0000 GPIOB 19 GP7 GP6 GP5 GP4 GP3 GP2 GP1 GP0 0000 0000 OLATB 1A OL7 OL6 OL5 OL4 OL3 OL2 OL1 OL0 0000 0000 |
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