IC 8051 MCU 64K FLASH 64TQFP

C8051F021-GQ

Manufacturer Part NumberC8051F021-GQ
DescriptionIC 8051 MCU 64K FLASH 64TQFP
ManufacturerSilicon Laboratories Inc
SeriesC8051F02x
C8051F021-GQ datasheets
 


Specifications of C8051F021-GQ

Program Memory TypeFLASHProgram Memory Size64KB (64K x 8)
Package / Case64-TQFP, 64-VQFPCore Processor8051
Core Size8-BitSpeed25MHz
ConnectivityEBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USARTPeripheralsBrown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o32Ram Size4.25K x 8
Voltage - Supply (vcc/vdd)2.7 V ~ 3.6 VData ConvertersA/D 8x8b, 8x12b; D/A 2x12b
Oscillator TypeInternalOperating Temperature-40°C ~ 85°C
Processor SeriesC8051F0xCore8051
Data Bus Width8 bitData Ram Size4.25 KB
Interface TypeI2C/SMBus/SPI/UARTMaximum Clock Frequency25 MHz
Number Of Programmable I/os32Number Of Timers4
Operating Supply Voltage2.7 V to 3.6 VMaximum Operating Temperature+ 85 C
Mounting StyleSMD/SMT3rd Party Development ToolsPK51, CA51, A51, ULINK2
Development Tools By SupplierC8051F020DKMinimum Operating Temperature- 40 C
On-chip Adc8-ch x 8-bit or 8-ch x 12-bitOn-chip Dac2-ch x 12-bit
No. Of I/o's32Ram Memory Size4352Byte
Cpu Speed25MHzNo. Of Timers5
No. Of Pwm Channels5Rohs CompliantYes
Data Rom Size64 KBA/d Bit Size12 bit
A/d Channels Available8Height1.05 mm
Length10 mmSupply Voltage (max)3.6 V
Supply Voltage (min)2.7 VWidth10 mm
Lead Free Status / RoHS StatusLead free / RoHS CompliantFor Use With336-1200 - DEV KIT FOR F020/F021/F022/F023
Eeprom Size-Other names336-1201
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Page 95/272

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11.
COMPARATORS
Each MCU includes two on-board voltage comparators as shown in Figure 11.1. The inputs of each Comparator are
available at the package pins. The output of each comparator is optionally available at the package pins via the I/O
crossbar. When assigned to package pins, each comparator output can be programmed to operate in open drain or
push-pull modes. See
Section “17. PORT INPUT/OUTPUT” on page 161
details.
The hysteresis of each comparator is software-programmable via its respective Comparator control register (CPT0CN
and CPT1CN for Comparator0 and Comparator1, respectively). 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 output of the comparator can be polled in software, or can be used as an interrupt source. Each
comparator can be individually enabled or disabled (shutdown). When disabled, the comparator output (if assigned to
a Port I/O pin via the Crossbar) defaults to the logic low state, its interrupt capability is suspended and its supply cur-
rent falls to less than 1 µA. Comparator inputs can be externally driven from -0.25 V to (AV+) + 0.25 V without dam-
age or upset.
The Comparator0 hysteresis is programmed using bits 3-0 in the Comparator0 Control Register CPT0CN (shown in
Figure 11.1). The amount of negative hysteresis voltage is determined by the settings of the CP0HYN bits; In a simi-
lar way, the amount of positive hysteresis is determined by the setting the CP0HYP bits. See Table 11.1 on page 99
for hysteresis level specifications.
Comparator interrupts can be generated on rising-edge and/or falling-edge output transitions. (For interrupt enable
and priority control, see
Section “12.3. Interrupt Handler” on page
Comparator0 falling-edge interrupt, and the CP0RIF flag is set upon the Comparator0 rising-edge interrupt. Once set,
these bits remain set until cleared by software. The Output State of Comparator0 can be obtained at any time by read-
ing the CP0OUT bit. Comparator0 is enabled by setting the CP0EN bit to logic 1, and is disabled by clearing this bit
Figure 11.1. Comparator Functional Block Diagram
CP0+
CP0-
CP1+
CP1-
116). The CP0FIF flag is set upon a
CP0EN
CP0OUT
CP0RIF
AV+
CP0FIF
CP0HYP1
CP0HYP0
Reset
CP0HYN1
Decision
CP0HYN0
+
D
-
(SYNCHRONIZER)
AGND
CP1EN
CP1OUT
CP1RIF
AV+
CP1FIF
CP1HYP1
CP1HYP0
CP1HYN1
CP1HYN0
+
D
-
(SYNCHRONIZER)
AGND
Rev. 1.4
C8051F020/1/2/3
for Crossbar and port initialization
Tree
Crossbar
SET
SET
Q
D
Q
Q
Q
CLR
CLR
Interrupt
Handler
Crossbar
SET
SET
Q
D
Q
Q
Q
CLR
CLR
Interrupt
Handler
95