C8051F930-GQ Silicon Laboratories Inc, C8051F930-GQ Datasheet - Page 92

• Manufacturer Part Number: C8051F930-GQ
• Description: IC 8051 MCU 64K FLASH 32-LQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F9xxr

Specifications of C8051F930-GQ

• Program Memory Type: FLASH
• Program Memory Size: 64KB (64K x 8)
• Package / Case: 32-LQFP
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 24
• Ram Size: 4.25K x 8
• Voltage - Supply (vcc/vdd): 0.9 V ~ 3.6 V
• Data Converters: A/D 23x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F9x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 4.25 KB
• Interface Type: I2C/SMBus/SPI/UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 24
• Number Of Timers: 4
• Operating Supply Voltage: 0.9 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F930DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 23-ch x 10-bit
• No. Of I/o's: 24
• Ram Memory Size: 4KB
• Cpu Speed: 25MHz
• No. Of Timers: 4
• Rohs Compliant: Yes
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1478 - PLATFORM PROG TOOLSTCK F920,F930336-1477 - PLATFORM PROG TOOLSTCK F920,F930336-1473 - KIT DEV C8051F920,F921,F930,F931336-1472 - BOARD TARGET/PROTO W/C8051F930
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1466

C8051F93x-C8051F92x
7.3.
Comparator response time may be configured in software via the CPTnMD registers described on
“CPT0MD: Comparator 0 Mode Selection” on page 94 and “CPT1MD: Comparator 1 Mode Selection” on
page 96. Four response time settings are available: Mode 0 (Fastest Response Time), Mode 1, Mode 2,
and Mode 3 (Lowest Power). Selecting a longer response time reduces the Comparator active supply
current. The Comparators also have low power shutdown state, which is entered any time the comparator
is disabled. Comparator rising edge and falling edge response times are typically not equal. See
Table 4.13 on page 62 for complete comparator timing and supply current specifications.
7.4.
The Comparators feature software-programmable hysterisis that can be used to stabilize the comparator
output while a transition is occurring on the input. Using the CPTnCN registers, 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 (i.e., the comparator negative input).
Figure 7.3 shows that when positive hysterisis is enabled, the comparator output does not transition from
logic 0 to logic 1 until the comparator positive input voltage has exceeded the threshold voltage by an
amount equal to the programmed hysterisis. It also shows that when negative hysterisis is enabled, the
comparator output does not transition from logic 1 to logic 0 until the comparator positive input voltage has
fallen below the threshold voltage by an amount equal to the programmed hysterisis.
The amount of positive hysterisis is determined by the settings of the CPnHYP bits in the CPTnCN register
and the amount of negative hysteresis voltage is determined by the settings of the CPnHYN bits in the
same register. Settings of 20 mV, 10 mV, 5 mV, or 0 mV can be programmed for both positive and negative
hysterisis. See Section “Table 4.13. Comparator Electrical Characteristics” on page 62 for complete
comparator hysterisis specifications.
92
(Programmed with CP0HYP Bits)
Comparator Response Time
Comparator Hysterisis
Positive Hysteresis Voltage
INPUTS
OUTPUT
VIN+
VIN-
CIRCUIT CONFIGURATION
Positive Hysteresis
CPn-
VIN+
CPn+
VIN-
Disabled
V
OL
Figure 7.3. Comparator Hysteresis Plot
V
OH
+
_
CPn
Positive Hysteresis
Maximum
OUT
Rev. 1.1
Negative Hysteresis
Disabled
Negative Hysteresis
(Programmed by CP0HYN Bits)
Maximum
Negative Hysteresis Voltage