C8051F302 Silicon Laboratories Inc, C8051F302 Datasheet - Page 48

• Manufacturer Part Number: C8051F302
• Description: IC 8051 MCU 8K FLASH 11MLP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F30xr

Specifications of C8051F302

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), UART/USART
• Peripherals: POR, PWM, Temp Sensor, WDT
• Number Of I /o: 8
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 8x8b
• Oscillator Type: External
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 11-VQFN
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: I2C, SMBus, UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 8
• Number Of Timers: 16 bit
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 8 bit
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Lead Free Status / Rohs Status: No

C8051F300/1/2/3/4/5
The output of Comparator0 can be polled in software, used as an interrupt source, and/or routed to a Port pin. When
routed to a Port pin, the Comparator0 output is available asynchronous or synchronous to the system clock; the asyn-
chronous output is available even in STOP mode (with no system clock active). When disabled, the Comparator0 out-
put (if assigned to a Port I/O pin via the Crossbar) defaults to the logic low state, and its supply current falls to less
than 100 nA. See
Comparator0 output via the digital Crossbar. Comparator0 inputs can be externally driven from -0.25 V to
(VDD) + 0.25 V without damage or upset. The complete electrical specifications for Comparator0 are given in
Table 7.1.
The Comparator0 response time may be configured in software via the CP0MD1-0 bits in register CPT0MD (see
Figure 7.5). Selecting a longer response time reduces the amount of power consumed by Comparator0. See Table 7.1
for complete timing and power consumption specifications.
The hysteresis of Comparator0 is software-programmable via its Comparator0 Control register (CPT0CN). The user
can program both the amount of hysteresis voltage (referred to the input voltage) and the positive and negative-going
symmetry of this hysteresis around the threshold voltage.
The Comparator0 hysteresis is programmed using Bits3-0 in the Comparator0 Control Register CPT0CN (shown in
Figure 7.3). The amount of negative hysteresis voltage is determined by the settings of the CP0HYN bits. As shown
in Figure 7.2, settings of 20, 10 or 5 mV 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 CP0HYP bits.
48
(Programmed with CP0HYP Bits)
Positive Hysteresis Voltage
INPUTS
OUTPUT
Section “12.1. Priority Crossbar Decoder” on page 96
VIN+
VIN-
CIRCUIT CONFIGURATION
Positive Hysteresis
CP0-
CP0+
VIN+
VIN-
Disabled
V
OL
Figure 7.2. Comparator Hysteresis Plot
V
OH
+
_
CP0
Positive Hysteresis
Maximum
OUT
Rev. 2.3
Negative Hysteresis
Disabled
Negative Hysteresis
(Programmed by CP0HYN Bits)
Maximum
Negative Hysteresis Voltage
for details on configuring the