C8051T610DK Silicon Laboratories Inc, C8051T610DK Datasheet - Page 185
C8051T610DK
Manufacturer Part Number
C8051T610DK
Description
KIT DEV FOR C8051T61X MCU'S
Manufacturer
Silicon Laboratories Inc
Type
MCUr
Specifications of C8051T610DK
Contents
Board, daughter boards, power adapter, cables, documentation and software
Processor To Be Evaluated
C8051T61x
Interface Type
USB
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With/related Products
C8051T610
For Use With
336-1507 - DAUGHTER BOARD T610 24QFN SOCKET336-1506 - DAUGHTER BOARD T610 28QFN SOCKET336-1505 - DAUGHT BOARD T610 32TQFP SOCKET
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1443
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25.3. Timer 3
Timer 3 is a 16-bit timer formed by two 8-bit SFRs: TMR3L (low byte) and TMR3H (high byte). Timer 3 may
operate in 16-bit auto-reload mode or (split) 8-bit auto-reload mode. The T3SPLIT bit (TMR3CN.3) defines
the Timer 3 operation mode.
Timer 3 may be clocked by the system clock, the system clock divided by 12, or the external oscillator
source divided by 8. The external clock mode is ideal for real-time clock (RTC) functionality, where the
internal oscillator drives the system clock while Timer 3 (and/or the PCA) is clocked by an external preci-
sion oscillator. Note that the external oscillator source divided by 8 is synchronized with the system clock.
25.3.1. 16-bit Timer with Auto-Reload
When T3SPLIT (TMR3CN.3) is zero, Timer 3 operates as a 16-bit timer with auto-reload. Timer 3 can be
clocked by SYSCLK, SYSCLK divided by 12, or the external oscillator clock source divided by 8. As the
16-bit timer register increments and overflows from 0xFFFF to 0x0000, the 16-bit value in the Timer 3
reload registers (TMR3RLH and TMR3RLL) is loaded into the Timer 3 register as shown in Figure 25.6,
and the Timer 3 High Byte Overflow Flag (TMR3CN.7) is set. If Timer 3 interrupts are enabled, an interrupt
will be generated on each Timer 3 overflow. Additionally, if Timer 3 interrupts are enabled and the TF3LEN
bit is set (TMR3CN.5), an interrupt will be generated each time the lower 8 bits (TMR3L) overflow from
0xFF to 0x00.
External Clock / 8
SYSCLK / 12
SYSCLK
T3XCLK
0
1
Figure 25.6. Timer 3 16-Bit Mode Block Diagram
T3ML
0
1
TR3
TCLK
Rev 1.0
Overflow
TL3
TMR3RLL TMR3RLH
TMR3L
C8051T610/1/2/3/4/5/6/7
To SMBus
TMR3H
Reload
To ADC,
SMBus
T3SPLIT
TF3LEN
T3XCLK
TF3H
TF3L
TR3
Interrupt
185
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