C8051F302 Silicon Laboratories Inc, C8051F302 Datasheet - Page 145

• 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

16.
The Programmable Counter Array (PCA0) provides enhanced timer functionality while requiring less CPU interven-
tion than the standard 8051 counter/timers. The PCA consists of a dedicated 16-bit counter/timer and three 16-bit
capture/compare modules. Each capture/compare module has its own associated I/O line (CEXn) which is routed
through the Crossbar to Port I/O when enabled (See
details on configuring the Crossbar). The counter/timer is driven by a programmable timebase that can select between
six sources: system clock, system clock divided by four, system clock divided by twelve, the external oscillator clock
source divided by 8, Timer 0 overflow, or an external clock signal on the ECI input pin. Each capture/compare mod-
ule may be configured to operate independently in one of six modes: Edge-Triggered Capture, Software Timer, High-
Speed Output, Frequency Output, 8-Bit PWM, or 16-Bit PWM (each mode is described in
Compare Modules” on page
ity, allowing the PCA to be clocked by a precision external oscillator while the internal oscillator drives the system
clock. The PCA is configured and controlled through the system controller's Special Function Registers. The basic
PCA block diagram is shown in Figure 16.1.
Important Note: The PCA Module 2 may be used as a watchdog timer (WDT), and is enabled in this mode follow-
ing a system reset. Access to certain PCA registers is restricted while WDT mode is enabled. See
details.
PROGRAMMABLE COUNTER ARRAY
SYSCLK/12
SYSCLK/4
Timer 0 Overflow
SYSCLK
External Clock/8
ECI
147). The external oscillator clock option is ideal for real-time clock (RTC) functional-
Capture/Compare
Module 0
Figure 16.1. PCA Block Diagram
CLOCK
MUX
PCA
Digital Crossbar
Port I/O
Section “12.1. Priority Crossbar Decoder” on page 96
Capture/Compare
16-Bit Counter/Timer
Rev. 2.3
Module 1
C8051F300/1/2/3/4/5
Capture/Compare
Module 2 / WDT
Section “16.2. Capture/
Section 16.3
145
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