C8051F346-GQ Silicon Laboratories Inc, C8051F346-GQ Datasheet - Page 65
![IC 8051 MCU FLASH 64K 32LQFP](/photos/12/18/121867/c8051f346-gq_sml.jpg)
C8051F346-GQ
Manufacturer Part Number
C8051F346-GQ
Description
IC 8051 MCU FLASH 64K 32LQFP
Manufacturer
Silicon Laboratories Inc
Series
C8051F34xr
Datasheets
1.C8051F349-GQ.pdf
(276 pages)
2.C8051F346-GQ.pdf
(1 pages)
3.C8051F347-GQ.pdf
(296 pages)
Specifications of C8051F346-GQ
Program Memory Type
FLASH
Program Memory Size
64KB (64K x 8)
Package / Case
32-LQFP
Core Processor
8051
Core Size
8-Bit
Speed
25MHz
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
4.25K 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
5.25 KB
Interface Type
I2C/SMBus/SPI/UART/USB
Maximum Clock Frequency
25 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
17-ch x 10-bit
No. Of I/o's
25
Ram Memory Size
4352Byte
Cpu Speed
25MHz
No. Of Timers
4
Rohs Compliant
Yes
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
336-1304
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6.
The Voltage reference MUX on C8051F340/1/2/3/4/5/6/7/8/9 devices is configurable to use an externally
connected voltage reference, the on-chip reference voltage generator, or the power supply voltage V
(see Figure 6.1). The REFSL bit in the Reference Control register (REF0CN) selects the reference source.
For the internal reference or an external source, REFSL should be set to ‘0’; For V
source, REFSL should be set to ‘1’.
The BIASE bit enables the internal ADC bias generator, which is used by the ADC and Internal Oscillator.
This enable is forced to logic 1 when either of the aforementioned peripherals is enabled. The ADC bias
generator may be enabled manually by writing a ‘1’ to the BIASE bit in register REF0CN; see SFR Defini-
tion 6.1 for REF0CN register details. The Reference bias generator (see Figure 6.1) is used by the Internal
Voltage Reference, Temperature Sensor, and Clock Multiplier. The Reference bias is automatically
enabled when any of the aforementioned peripherals are enabled. The electrical specifications for the volt-
age reference and bias circuits are given in Table 6.1.
Important Note About the VREF Pin: The VREF pin, when not using the on-chip voltage reference or an
external precision reference, can be configured as a GPIO Port pin. When using an external voltage refer-
ence or the on-chip reference, the VREF pin should be configured as analog pin and skipped by the Digital
Crossbar. To configure the VREF pin for analog mode, set the corresponding bit in the PnMDIN register to
‘0’. To configure the Crossbar to skip the VREF pin, set the corresponding bit in register PnSKIP to ‘1’.
Refer to
The temperature sensor connects to the ADC0 positive input multiplexer (see
plexer” on page 50
sensor. While disabled, the temperature sensor defaults to a high impedance state and any ADC0 mea-
surements performed on the sensor result in meaningless data.
Voltage Reference (C8051F340/1/2/3/4/5/6/7 Only)
Section “15. Port Input/Output” on page 157
GND
VDD
R1
Figure 6.1. Voltage Reference Functional Block Diagram
Reference
External
Voltage
Circuit
for details). The TEMPE bit in register REF0CN enables/disables the temperature
VREF
VDD
REF0CN
0
1
TEMPE
C8051F340/1/2/3/4/5/6/7/8/9
Rev. 1.1
Reference
CLKMUL
REFBE
Internal
Enable
IOSCEN
for complete Port I/O configuration details.
AD0EN
EN
EN
EN
EN
Temp Sensor
Reference
ADC Bias
Bias
Section “5.1. Analog Multi-
To ADC,
Internal Oscillator
To Analog Mux
(to ADC)
To Clock Multiplier,
Temp Sensor
VREF
DD
as the reference
DD
65
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