C8051F341-GQ Silicon Laboratories Inc, C8051F341-GQ Datasheet - Page 249

• Manufacturer Part Number: C8051F341-GQ
• Description: IC 8051 MCU FLASH 32K 48TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F34xr

Specifications of C8051F341-GQ

• Program Memory Type: FLASH
• Program Memory Size: 32KB (32K x 8)
• Package / Case: 48-TQFP, 48-VQFP
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 48MHz
• Connectivity: EBI/EMI, SMBus (2-Wire/I²C), SPI, UART/USART, USB
• Peripherals: Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
• Number Of I /o: 40
• Ram Size: 2.25K x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 20x10b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F3x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 3.25 KB
• Interface Type: I2C/SMBus/SPI/UART/USB
• Maximum Clock Frequency: 48 MHz
• Number Of Programmable I/os: 40
• Number Of Timers: 4
• Operating Supply Voltage: 2.7 V to 5.25 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: KSK-SL-F34X, KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F340DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 17-ch x 10-bit
• No. Of I/o's: 40
• Ram Memory Size: 2304Byte
• Cpu Speed: 48MHz
• No. Of Timers: 4
• Rohs Compliant: Yes
• Package: 48TQFP
• Device Core: 8051
• Family Name: C8051F34x
• Maximum Speed: 48 MHz
• Data Rom Size: 128 B
• A/d Bit Size: 10 bit
• A/d Channels Available: 17
• Height: 1 mm
• Length: 7 mm
• Supply Voltage (max): 3.6 V
• Supply Voltage (min): 2.7 V
• Width: 7 mm
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1748 - ADAPTER TOOLSTICK FOR C8051F34X770-1006 - ISP 4PORT FOR SILABS C8051F MCU336-1452 - ADAPTER PROGRAM TOOLSTICK F340
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1299

21.3. 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, (split) 8-bit auto-reload mode, USB Start-of-Frame (SOF) capture
mode, or Low-Frequency Oscillator (LFO) Rising Edge capture mode. The Timer 3 operation mode is
defined by the T3SPLIT (TMR3CN.3), T3CE (TMR3CN.4) bits, and T3CSS (TMR3CN.1) bits.
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.
21.3.1. 16-bit Timer with Auto-Reload
When T3SPLIT (TMR3CN.3) is ‘0’ and T3CE = ‘0’, 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 TM3RLL) is loaded into the Timer 3 register as shown in
Figure 21.4, 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) over-
flow from 0xFF to 0x00.
External Clock / 8
SYSCLK / 12
SYSCLK
T3XCLK
0
1
Figure 21.8. Timer 3 16-Bit Mode Block Diagram
M
T
3
H
M
T
3
L
0
1
CKCON
M
H
T
2
C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
M
T
2
L
T
M
1
M
T
0
C
S
A
1
TR3
C
S
A
0
TCLK
Rev. 1.3
TMR3RLL TMR3RLH
TMR3L
TMR3H
Reload
To ADC
T3SPLIT
TF3LEN
T3XCLK
T3CSS
TF3H
T3CE
TF3L
TR3
Interrupt
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