Rainbow Electronics AT83C26 - Manual (Page 59)

59
7511B–SCR–10/05
AT83C26
Reset value = 0x 1111 0010
Table 41. ITDIS ()
7 6 5 4 3 2 1 0
IODIS5 IODIS4 IODIS3 IODIS2 ITDIS5 ITDIS4 ITDIS3 ITDIS2
Bit Number Bit Mnemonic Description
7 IODIS5
Card I/O isolation
Set this bit to drive CIO5 pin according to CARDIO5.
Clear this bit to drive the CIO5 pin connected to inputs according to IO_SELECT registers.
If IOSEL config doesn’t link an input to CIO5, CIO5 outputs CARDIO5 value.
6 IODIS4
Card I/O isolation
Set this bit to drive CIO4 pin according to CARDIO4.
Clear this bit to drive the CIO4 pin connected to inputs according to IO_SELECT registers.
If IOSEL config doesn’t link an input to CIO4, CIO4 outputs CARDIO4 value.
5 IODIS3
Card I/O isolation
Set this bit to drive CIO3 pin according to CARDIO3.
Clear this bit to drive the CIO3 pin connected to inputs according to IO_SELECT registers.
If IOSEL config doesn’t link an input to CIO3, CIO3 outputs CARDIO3 value.
4 IODIS2
Card I/O isolation
Set this bit to drive the CIO2, CC42, CC82 pins according to CARDIO2, CARDC42, CARDC82 respectively.
Clear this bit to drive the CIO2, CC42 and CC82 pins connected to inputs according to IO_SELECT register.
If IOSEL config doesn’t link an input to CIO2, CIO2 outputs CARDIO2 value.
3 ITDIS5
Interrupt Disable of Smart Card Interface 5
Set this bit to disable interrupts from the interface 5 (the flags are set but INT pin is not driven).
Clear this bit to allow interrupts.
2 ITDIS4
Interrupt Disable of Smart Card Interface 4
Set this bit to disable interrupts from the interface 4(the flags are set but INT pin is not driven).
Clear this bit to allow interrupts.
1 ITDIS3
Interrupt Disable of Smart Card Interface 3
Set this bit to disable interrupts from the interface 3 (the flags are set but INT pin is not driven).
Clear this bit to allow interrupts.
0 ITDIS2
Interrupt Disable of Smart Card Interface 2
Set this bit to disable interrupts from the interface 2(the flags are set but INT pin is not driven).
Clear this bit to allow interrupts.