C8051F226DK Silicon Laboratories Inc, C8051F226DK Datasheet - Page 133

• Manufacturer Part Number: C8051F226DK
• Description: DEV KIT F220/221/226/230/231/236
• Manufacturer: Silicon Laboratories Inc
• Type: MCUr

Specifications of C8051F226DK

• Contents: Evaluation Board, Power Supply, USB Cables, Adapter and Documentation
• Processor To Be Evaluated: C8051F22x and C8051F23x
• Interface Type: USB
• Silicon Manufacturer: Silicon Labs
• Core Architecture: 8051
• Silicon Core Number: C8051F226
• Silicon Family Name: C8051F2xx
• Lead Free Status / RoHS Status: Contains lead / RoHS non-compliant
• For Use With/related Products: C8051F220, 221, 226, 230, 231, 236
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1241

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
133