nRF24LE1 Nordic VLSI, nRF24LE1 Datasheet - Page 166

• Manufacturer Part Number: nRF24LE1
• Manufacturer: Nordic VLSI

nRF24LE1 Preliminary Product Specification
The analog comparator is used as a wakeup source. It allows a system wakeup to be triggered by the volt-
age level of a differential or single ended analog input applied through the port pins. The comparator has
very low current consumption, and is operational in the register retention mode and memory retention
mode timer on.
22.1
22.2
22.3
22.3.1
Enable the comparator by setting the enable bit in the COMPCON register. The comparator is activated
when the system enters register retention mode or memory retention mode timer on. It is not operational in
any other system modes. In order to use the comparator a 32kHz clock source must also be activated.
22.3.2
Depending on package variant, one out of up to 14 different port pins may be used to apply a voltage to the
non-inverting comparator input. Configure the chsel bits in the ADCCON1 register to select one of AIN0
through AIN13 as input. Note that ‘1110’ and ‘1111’ are illegal values; if these are specified the non-invert-
ing comparator input will float. The pwrup bit in ADCCON1 does not have to be set.
Refer to
Revision 1.1
22
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from port pins
Analog input
Low current consumption (0.75µA typical)
Differential or single-ended input
Single-ended threshold programmable to 25%, 50%, 75% or 100% of VDD or an arbitrary reference
voltage from pin
14-channel input multiplexer
Rail-to-rail input voltage range
Programmable output polarity
chapter 17 on page 127
Analog comparator
AIN0-AIN13
AIN3, AIN9
ADCCON1.refsel
ADCCON1.chsel
Features
Block diagram
Functional description
Activation
Input selection
COMPCON.cmpref
Figure 73. Block diagram of analog comparator
M
U
M
U
X
X
COMPCON.refscale
for a description of the mapping between port pins and AIN0-AIN13.
VDD
M
U
X
166 of 191
scaler
Prog.
COMPCON.polarity
Wakeup source