Z8FMC16100 Series Flash MCU
Product Specification
47
Interrupt Port Select Register
The Interrupt Port Select Register, shown in Table 25, is used to select which Port A pins
are used as interrupts.
Table 25. Interrupt Port Select Sub-Register (IRQPS)
BITS
FIELD
RESET
R/W
7
6
5
4
3
2
1
0
Reserved
PA73SEL PA62SEL PA51SEL PA40SEL
0
0
0
0
0
0
0
0
R
R
R
R
R/W
R/W
R/W
R/W
If 09H in Port A Address Register, accessible through the Port A and Port C Control Register
ADDR
Bit
Value
(H)
Description
Position
[3:0]
Interrupt Port Select x
PAxxSEL
0
1
An interrupt request is generated on PAx, where x indicates (0 through 3)
An interrupt request is generated on PAx, where x indicates (4 through 7)
Port B Alternate Function 1 Subregisters
The Port B Alternate Function Subregisters, shown in Table 26, is accessed through the
Port B Control Register by writing 08Hto the Port B Address Register. The Port B Alter-
nate Function subregister selects the alternate functions for the selected pins. Refer to the
GPIO Alternate Functions section on page 36 to determine the alternate function associ-
ated with each port pin.
Do not enable alternate function for GPIO port pins which do not have an associated al-
ternate function. Failure to follow this guideline may result in unpredictable operation.
Caution:
PS024604-1005
P R E L I M I N A R Y
Port A–C Control Registers
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