C8051F302 Silicon Laboratories Inc, C8051F302 Datasheet - Page 152

IC 8051 MCU 8K FLASH 11MLP

C8051F302

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

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

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C8051F300/1/2/3/4/5
16.2.5. 8-Bit Pulse Width Modulator Mode
Each module can be used independently to generate a pulse width modulated (PWM) output on its associated CEXn
pin. The frequency of the output is dependent on the timebase for the PCA counter/timer. The duty cycle of the PWM
output signal is varied using the module's PCA0CPLn capture/compare register. When the value in the low byte of the
PCA counter/timer (PCA0L) is equal to the value in PCA0CPLn, the output on the CEXn pin will be set to ‘1’. When
the count value in PCA0L overflows, the CEXn output will be set to ‘0’ (see Figure 16.8). Also, when the counter/
timer low byte (PCA0L) overflows from 0xFF to 0x00, PCA0CPLn is reloaded automatically with the value stored in
the module’s capture/compare high byte (PCA0CPHn) without software intervention. Setting the ECOMn and
PWMn bits in the PCA0CPMn register enables 8-Bit Pulse Width Modulator mode. The duty cycle for 8-Bit PWM
Mode is given by Equation 16.2.
Important Note About Capture/Compare Registers: When writing a 16-bit value to the PCA0 Capture/Compare
registers, the low byte should always be written first. Writing to PCA0CPLn clears the ECOMn bit to ‘0’; writing to
PCA0CPHn sets ECOMn to ‘1’.
152
Equation 16.2. 8-Bit PWM Duty Cycle
DutyCycle
=
Rev. 2.3
(
-------------------------------------------------- -
256 PCA0CPHn
256
)

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