Z86E3016PSG Datasheet, PDF (122/348 Pages) Zilog, Inc. – Z86E3016PSG

Z8 Family of Microcontrollers
User Manual
104
Interrupts
In the example from Section 5.8.3, P32 (AN2) will generate an interrupt
based on the result of the comparison being low and the Interrupt Request
Register (IRQ FAh) having bits D7 = 0 and D6 = 0. If IRQ D7 = 1 and D6
= 0 then both P31 and P32 would generate interrupts.
Comparator Definitions
V_ICR
The usable voltage range for both positive inputs and the reference input
is called the common mode voltage range (V_ICR). The comparator is not
guaranteed to work if the inputs are outside of the V_ICR range.
V_OFFSET
The absolute value of the voltage between the positive input and the refer-
ence input required to make the comparator output voltage switch is the
input offset voltage (V_OFFSET). If AN1 is 3.000V and Ref is 3.001V when
the comparator output switches states then the Voffset = 1mV.
I_IO
For CMOS voltage comparator inputs, the input offset current (I_IO) is the
leakage current of the CMOS input gate.
Run Mode
P33 is not available as an interrupt input during analog mode. P31 and
P32 are valid interrupt inputs in conjunction with P33 (Ref) when in ana-
log mode.
P31 can still be used as T_IN when analog mode is selected. If comparator
outputs are required to be outputted on the Port 3 outputs, please refer to
specific products specification for priority of mixing when other special
features are sharing those same Port 3 pins.
I/O Ports
UM001602-0904