C8051F343-GM Silicon Laboratories Inc, C8051F343-GM Datasheet - Page 132
![IC 8051 MCU 32K FLASH MEM 32-QFN](/photos/12/27/122777/c8051f343-gm_sml.jpg)
C8051F343-GM
Manufacturer Part Number
C8051F343-GM
Description
IC 8051 MCU 32K FLASH MEM 32-QFN
Manufacturer
Silicon Laboratories Inc
Series
C8051F34xr
Datasheet
1.C8051F349-GQ.pdf
(276 pages)
Specifications of C8051F343-GM
Program Memory Type
FLASH
Program Memory Size
32KB (32K x 8)
Package / Case
32-QFN
Core Processor
8051
Core Size
8-Bit
Speed
48MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART, USB
Peripherals
Brown-out Detect/Reset, POR, PWM, Temp Sensor, WDT
Number Of I /o
25
Ram Size
2.25K x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 21x10b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
2304 B
Interface Type
I2C, SPI, UART
Maximum Clock Frequency
48 MHz
Number Of Programmable I/os
25
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
10 bit
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
For Use With
336-1748 - ADAPTER TOOLSTICK FOR C8051F34X770-1006 - ISP 4PORT FOR SILABS C8051F MCU
Eeprom Size
-
Lead Free Status / Rohs Status
Lead free / RoHS Compliant
Other names
336-1346-5
Available stocks
Company
Part Number
Manufacturer
Quantity
Price
Company:
Part Number:
C8051F343-GM
Manufacturer:
Silicon Labs
Quantity:
135
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C8051F340/1/2/3/4/5/6/7/8/9/A/B/C/D
14.1. Programmable Internal High-Frequency (H-F) Oscillator
All C8051F34x devices include a programmable internal oscillator that defaults as the system clock after a
system reset. The internal oscillator period can be programmed via the OSCICL register shown in SFR
Definition 14.2. The OSCICL register is factory calibrated to obtain a 12 MHz internal oscillator frequency.
Electrical specifications for the precision internal oscillator are given in Table 14.1 on page 141. Note that
the system clock may be derived from the programmed internal oscillator divided by 1, 2, 4, or 8, as
defined by the IFCN bits in register OSCICN. The divide value defaults to 8 following a reset.
14.1.1. Internal H-F Oscillator Suspend Mode
The internal high-frequency oscillator may be placed in Suspend mode by writing ‘1’ to the SUSPEND bit in
register OSCICN. In Suspend mode, the internal H-F oscillator is stopped until a non-idle USB event is
detected (
tion 8.2
132
Bit7:
Bit6:
Bit5:
Bits4–2: UNUSED. Read = 000b, Write = don't care.
Bits1–0: IFCN1–0: Internal H-F Oscillator Frequency Control.
IOSCEN
R/W
Bit7
). Note that the USB transceiver can still detect USB events when it is disabled.
Section 16
IOSCEN: Internal H-F Oscillator Enable Bit.
0: Internal H-F Oscillator Disabled.
1: Internal H-F Oscillator Enabled.
IFRDY: Internal H-F Oscillator Frequency Ready Flag.
0: Internal H-F Oscillator is not running at programmed frequency.
1: Internal H-F Oscillator is running at programmed frequency.
SUSPEND: Force Suspend
Writing a ‘1’ to this bit will force the internal H-F oscillator to be stopped. The oscillator will be
re-started on the next non-idle USB event (i.e., RESUME signaling) or VBUS interrupt event
(see SFR Definition 8.1).
00: SYSCLK derived from Internal H-F Oscillator divided by 8.
01: SYSCLK derived from Internal H-F Oscillator divided by 4.
10: SYSCLK derived from Internal H-F Oscillator divided by 2.
11: SYSCLK derived from Internal H-F Oscillator divided by 1.
SFR Definition 14.1. OSCICN: Internal H-F Oscillator Control
IFRDY
Bit6
R
) or VBUS matches the polarity selected by the VBPOL bit in register REG0CN (
SUSPEND
R/W
Bit5
Bit4
R
-
Rev. 1.3
R/W
Bit3
-
R/W
Bit2
-
IFCN1
R/W
Bit1
IFCN0
R/W
Bit0
SFR Address:
10000000
Reset Value
0xB2
Sec-
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