z16f2811 ZiLOG Semiconductor, z16f2811 Datasheet - Page 264

• Manufacturer Part Number: z16f2811
• Description: High Performance Microcontrollers
• Manufacturer: ZiLOG Semiconductor

Comparator Operation
Operational Amplifier Operation
Interrupts
PS022006-0207
The comparator output reflects the relationship between the non-inverting input and the
inverting (reference) input. If the voltage on the non-inverting input is higher than the
voltage on the inverting input, the comparator output is at a high state. If the voltage on the
non-inverting input is lower than the voltage on the inverting input, the comparator output
is at a low state.
To operate, the comparator must be enabled by setting the CMPEN bit in the comparator
and op-amp register to 1. In addition the CINP and CINN comparator input alternate
functions must be enabled on their respective GPIO pins. For more information, see
Alternate Functions
The comparator does not automatically power-down. To reduce operating current when
not in use, the comparator is disabled by clearing the CMPEN bit to 0.
To operate, the operational amplifier must be enabled by setting the OPEN bit in the
comparator and op-amp register to 1. In addition, the OPINP, OPINN, and OPOUT alter-
nate functions must be enabled on their respective general-purpose I/O pins. For more
information, see
The logical value of the operational amplifier output (OPOUT) is read from the Port 3 data
input register if both the operational amplifier and input pin Schmitt trigger are enabled.
For more information, see
fier generates an interrupt via the GPIO Port B3 input interrupt, if enabled.
The output of the operational amplifier is also connected to an analog input (ANA3) of the
ADC multiplexer.
The operational amplifier does not automatically power-down. To reduce operating cur-
rent when not in use, the operational amplifier is disabled by clearing the
comparator and op-amp register to 0.
When the operational amplifier is disabled, the output is high impedance.
The comparator generates an interrupt on any change in the logic output value (from 0 to 1
and from 1 to 0). For information on enabling and prioritization of the comparator
interrupt, see
Interrupt Controller
GPIO Alternate Functions
on page 68.
GPIO Alternate Functions
P R E L I M I N A R Y
on page 79.
on page 68.
on page 68. The operational ampli-
Product Specification
ZNEO
Analog Functions
™
OPEN
Z16F Series
bit in the
GPIO
250