TOOLSTICK560DC Silicon Laboratories Inc, TOOLSTICK560DC Datasheet - Page 71
TOOLSTICK560DC
Manufacturer Part Number
TOOLSTICK560DC
Description
DAUGHTER CARD TOOLSTICK F560
Manufacturer
Silicon Laboratories Inc
Series
ToolStickr
Type
MCUr
Specifications of TOOLSTICK560DC
Contents
Daughter Card
Processor To Be Evaluated
C8051F55x, C8051F56x, C8051F57x
Interface Type
USB
Operating Supply Voltage
2.7 V to 3.6 V
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051F55x, C8051F56x, C8051F57x
For Use With
336-1345 - TOOLSTICK BASE ADAPTER336-1182 - ADAPTER USB DEBUG FOR C8051FXXX
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1719
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Comparator outputs can be polled in software, used as an interrupt source, and/or routed to a Port pin.
When routed to a Port pin, Comparator outputs are available asynchronous or synchronous to the system
clock; the asynchronous output is available even in STOP mode (with no system clock active). When dis-
abled, the Comparator output (if assigned to a Port I/O pin via the Crossbar) defaults to the logic low state,
and the power supply to the comparator is turned off. See Section “19.3. Priority Crossbar Decoder” on
page 170 for details on configuring Comparator outputs via the digital Crossbar. Comparator inputs can be
externally driven from –0.25 V to (V
trical specifications are given in Table 5.12.
The Comparator response time may be configured in software via the CPTnMD registers (see SFR Defini-
tion 8.2). Selecting a longer response time reduces the Comparator supply current. See Table 5.12 for
complete timing and supply current requirements.
Comparator hysteresis is software-programmable via its Comparator Control register CPTnCN.
The amount of negative hysteresis voltage is determined by the settings of the CPnHYN bits. As shown in
Figure 8.2, various levels of negative hysteresis can be programmed, or negative hysteresis can be dis-
abled. 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 “13. Interrupts” .) The CPnFIF flag is set to 1 upon a Comparator fall-
ing-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 CPnHYP Bits)
Positive Hysteresis Voltage
INPUTS
OUTPUT
VIN+
VIN-
CIRCUIT CONFIGURATION
Positive Hysteresis
CPn-
VIN+
CPn+
VIN-
V
Disabled
OL
Figure 8.2. Comparator Hysteresis Plot
V
OH
+
_
CPn
DD
) + 0.25 V without damage or upset. The complete Comparator elec-
Positive Hysteresis
Maximum
OUT
Rev. 1.1
Negative Hysteresis
Disabled
C8051F55x/56x/57x
Negative Hysteresis
(Programmed by CPnHYN Bits)
Maximum
Negative Hysteresis Voltage
71
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