C8051F320DK Silicon Laboratories Inc, C8051F320DK Datasheet - Page 59

• Manufacturer Part Number: C8051F320DK
• Description: DEV KIT FOR C8051F320/F321
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F320DK

• Contents: Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
• Processor To Be Evaluated: C8051F320/F321
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F320
• Silicon Family Name: C8051F32x
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: Silicon Laboratories C8051F320, C8051F321
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1260

Comparator hysteresis is programmed using Bits3–0 in the Comparator Control Register CPTnCN (shown
in Figure 7.1 and Figure 7.4). The amount of negative hysteresis voltage is determined by the settings of
the CPnHYN bits. As shown in Figure 7.3, settings of 20, 10 or 5 mV of negative hysteresis can be
programmed, or negative hysteresis can be disabled. In a similar way, the amount of positive hysteresis is
determined by the setting the CPnHYP bits.
Comparator interrupts can be generated on both rising-edge and falling-edge output transitions. (For Inter-
rupt enable and priority control, see Section “9.3. Interrupt Handler” on page 87.) The CPnFIF flag is set to
‘1’ upon a Comparator falling-edge, and the CPnRIF flag is set to ‘1’ upon the Comparator rising-edge.
Once set, these bits remain set until cleared by software. The output state of the Comparator can be
obtained at any time by reading the CPnOUT bit. The Comparator is enabled by setting the CPnEN bit to
‘1’, and is disabled by clearing this bit to ‘0’.
(Programmed with CP0HYP Bits)
Positive Hysteresis Voltage
INPUTS
OUTPUT
VIN+
VIN-
CIRCUIT CONFIGURATION
Positive Hysteresis
CP0-
CP0+
VIN+
VIN-
Disabled
V
OL
Figure 7.3. Comparator Hysteresis Plot
V
OH
+
_
CP0
Positive Hysteresis
Maximum
OUT
Rev. 1.4
Negative Hysteresis
Disabled
Negative Hysteresis
(Programmed by CP0HYN Bits)
Maximum
Negative Hysteresis Voltage
C8051F320/1
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