C8051F710-GQR Silicon Labs, C8051F710-GQR Datasheet - Page 279
![no-image](/images/no-image-200.jpg)
C8051F710-GQR
Manufacturer Part Number
C8051F710-GQR
Description
8-bit Microcontrollers - MCU 8kB ADC Cap Sense
Manufacturer
Silicon Labs
Datasheet
1.C8051F709-GQR.pdf
(306 pages)
Specifications of C8051F710-GQR
Rohs
yes
Core
8051
Processor Series
C8051
Data Bus Width
8 bit
Available stocks
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Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F710-GQR
Manufacturer:
Silicon Laboratories Inc
Quantity:
10 000
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33.3.2. 8-bit Timers with Auto-Reload
When T3SPLIT is set, Timer 3 operates as two 8-bit timers (TMR3H and TMR3L). Both 8-bit timers oper-
ate in auto-reload mode as shown in Figure 33.8. TMR3RLL holds the reload value for TMR3L; TMR3RLH
holds the reload value for TMR3H. The TR3 bit in TMR3CN handles the run control for TMR3H. TMR3L is
always running when configured for 8-bit Mode. Timer 3 can also be used in capture mode to capture rising
edges of the Comparator 0 output.
Each 8-bit timer may be configured to use SYSCLK, SYSCLK divided by 12, or the external oscillator clock
source divided by 8. The Timer 3 clock select bits (T3MH and T3ML in CKCON) select either SYSCLK or
the clock defined by the Timer 3 External Clock Select bits (T3XCLK in TMR3CN), as follows:
The TF3H bit is set when TMR3H overflows from 0xFF to 0x00; the TF3L bit is set when TMR3L overflows
from 0xFF to 0x00. When Timer 3 interrupts are enabled, an interrupt is generated each time TMR3H over-
flows. If Timer 3 interrupts are enabled and TF3LEN (TMR3CN.5) is set, an interrupt is generated each
time either TMR3L or TMR3H overflows. When TF3LEN is enabled, software must check the TF3H and
TF3L flags to determine the source of the Timer 3 interrupt. The TF3H and TF3L interrupt flags are not
cleared by hardware and must be manually cleared by software.
External Clock / 8
T3MH
SYSCLK / 12
0
0
1
T3XCLK
T3XCLK
0
1
X
0
1
SYSCLK
Figure 33.8. Timer 3 8-Bit Mode Block Diagram
TMR3H Clock
Source
SYSCLK / 12
External Clock / 8
SYSCLK
0
1
1
0
M
H
T
3
T
M
3
L
CKCON
T
M
H
2
M
T
2
L
TR3
M
T
1
M
T
0
C
S
A
1
S
C
A
0
Rev. 1.0
TCLK
TCLK
TMR3RLH
TMR3RLL
TMR3H
TMR3L
T3ML
0
0
1
Reload
Reload
C8051F70x/71x
T3XCLK
X
0
1
To ADC
TF3CEN
T3SPLIT
TF3LEN
T3XCLK
TF3H
TF3L
TR3
TMR3L Clock
Source
SYSCLK / 12
External Clock / 8
SYSCLK
Interrupt
279
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