Omega Vehicle Security OME-PIO-D56 manual Interrupt Polarity Control Register

3.3.6Interrupt Polarity Control Register

(Read/Write): wBase+0x2A

Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
0	0	0	0	INV3	INV2	INV1	INV0

Note. Refer to Sec. 3.1 for more information about wBase.

INV0=1Æ select the non-inverted signal from PC0

INV0=0Æ select the inverted signal from PC0

outportb(wBase+0x2a,0x0f);	/* select the non-inverted input PC0/1/2/3	*/
outportb(wBase+0x2a,0x00);	/* select the inverted input of PC0/1/2/3	*/
outportb(wBase+0x2a,0x0e); /* select the inverted input of PC0		*/
	/* select the non-inverted input PC1/2/3	*/
outportb(wBase+0x2a,0x0c); /* select the inverted input of PC0/1		*/
	/* select the non-inverted input PC2/3	*/

Refer to Sec. 2.4 for more information.

Refer to DEMO5.C for more information.

3.3.7I/O Selection Control Register

(Write): wBase+0xcc

Bit 7	Bit 6	Bit 5	Bit 4	Bit 3	Bit 2	Bit 1	Bit 0
0	0	0	0	0	Port2	Port1	Port0

Note. Refer to Sec. 3.1 for more information about wBase.

Port? = 1Æ this port is used as a D/O port

Port? = 0Æ this port is used as a D/I port

outportb(wBase+0xcc,0x00);	/* configure Port0/1/2 as D/I port	*/
outportb(wBase+0xcc,0x04);	/* configure Port0/1 as D/I port	*/
	/* configure Port2 as D/O port	*/

OME-PIO-D56/PIO-D24 User Manual (Ver.2.1, Oct/2003, PPH-005-21) ---- 36