nrf24le1-f16q48-t ETC-unknow, nrf24le1-f16q48-t Datasheet - Page 167

• Manufacturer Part Number: nrf24le1-f16q48-t
• Description: Ultra-low Power Wireless System On-chip Solution
• Manufacturer: ETC-unknow

nRF24LE1 Preliminary Product Specification
22.3.3
The inverting comparator input can be connected to 25%, 50%, 75% or 100% of either VDD or an arbitrary
reference voltage from AIN3 or AIN9. Configure the refscale bits in COMPCON to select scaling factor. To
use VDD as a reference, set cmpref to ‘0’. To use an arbitrary reference, set cmpref to ‘1’ and configure
refsel in ADCCON1 to choose between AIN3 and AIN9 as input pin for the reference. Note that ‘00’ and
‘01’ are illegal values for refsel ; if these are specified the inverting comparator input will float.
Differential input mode is configured by setting refscale to 100% and choosing AIN3 or AIN9 as invert-
ing input.
22.3.4
The polarity of the comparator output is programmable. The default behavior is that a wakeup is triggered
when the non-inverting input rises above the inverting input. However, if the polarity bit is set a wakeup
is triggered when the non-inverting input drops below the inverting input.
22.3.5
The input voltage range on AIN0-AIN13 is from VSS to VDD+100mV. However, the input voltage must
never exceed 3.6V.
22.3.6
22.3.7
The comparator has a switched capacitor input clocked at 32kHz. It is recommended to connect a 330pF
bypass capacitor between the analog input pin(s) and VSS. This reduces voltage transients introduced by
the switching. The capacitor may be omitted if the signal source has an output resistance smaller than
100k Ω . The input bias current of the comparator is typically below 100nA.
Revision 1.1
Wakeup criterion
AIN0 > 0.25 ⋅ VDD
AIN13 < 0.5 ⋅ VDD
AIN2 > 0.75 ⋅ AIN3
AIN3 < AIN9
Reference selection
Configuration examples
Output polarity
Input voltage range
Driving the analog input
Table 104. Configuration examples
chsel
0000
0010
1101
0011
ADCCON1
167 of 191
refsel
XX
XX
10
11
polarity
0
1
0
1
COMPCON
refscale
00
01
10
11
cmpref
0
0
1
1