C8051F236 Silicon Laboratories Inc, C8051F236 Datasheet - Page 133

• Manufacturer Part Number: C8051F236
• Description: IC 8051 MCU 8K FLASH 48TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F2xxr

Specifications of C8051F236

• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 32
• Program Memory Size: 8KB (8K x 8)
• Program Memory Type: FLASH
• Ram Size: 1.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Package / Case: 48-TQFP, 48-VQFP
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• Eeprom Size: -
• Data Converters: -

17.2. Timer 2
Timer 2 is a 16-bit counter/timer formed by the two 8-bit SFR's: TL2 (low byte) and TH2 (high byte). As
with Timers 0 and 1, Timer 2 can use either the system clock or transitions on an external input pin as its
clock source. The Counter/Timer Select bit C/T2 bit (T2CON.1) selects the clock source for Timer 2.
Clearing C/T2 selects the system clock as the input for the timer (divided by either one or twelve as speci-
fied by the Timer Clock Select bit T2M in CKCON). When C/T2 is set to 1, high-to-low transitions at the T2
input pin increment the counter/timer register. (Refer to Section 14 for information on selecting and config-
uring external I/O pins.) Timer 2 can also be used to start an ADC Data Conversion (see section 5).
Timer 2 offers capabilities not found in Timer 0 and Timer 1. It operates in one of three modes: 16-bit
Counter/Timer with Capture, 16-bit Counter/Timer with Auto-Reload or Baud Rate Generator Mode. Timer
2's operating mode is selected by setting configuration bits in the Timer 2 Control (T2CON) register. Below
is a summary of the Timer 2 operating modes and the T2CON bits used to configure the counter/timer.
Detailed descriptions of each mode follow.
RCLK
X
0
0
0
1
1
TCLK
X
0
0
1
0
1
CP/RL2
X
X
X
X
1
0
TR2
1
1
1
1
1
0
Rev. 1.6
16-bit Counter/Timer with Capture
16-bit Counter/Timer with Auto-Reload
Baud Rate Generator for TX
Baud Rate Generator for RX
Baud Rate Generator for TX and RX
Off
Mode
C8051F2xx
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