C8051F351-GMR Silicon Laboratories Inc, C8051F351-GMR Datasheet - Page 134
![IC 8051 MCU 8K FLASH 28MLP](/photos/6/93/69391/sl-28-mlp_sml.jpg)
C8051F351-GMR
Manufacturer Part Number
C8051F351-GMR
Description
IC 8051 MCU 8K FLASH 28MLP
Manufacturer
Silicon Laboratories Inc
Series
C8051F35xr
Specifications of C8051F351-GMR
Core Processor
8051
Core Size
8-Bit
Speed
50MHz
Connectivity
SMBus (2-Wire/I²C), SPI, UART/USART
Peripherals
POR, PWM, Temp Sensor, WDT
Number Of I /o
17
Program Memory Size
8KB (8K x 8)
Program Memory Type
FLASH
Ram Size
768 x 8
Voltage - Supply (vcc/vdd)
2.7 V ~ 3.6 V
Data Converters
A/D 8x24b; D/A 2x8b
Oscillator Type
Internal
Operating Temperature
-40°C ~ 85°C
Package / Case
28-VQFN Exposed Pad, 28-HVQFN, 28-SQFN, 28-DHVQFN
Processor Series
C8051F3x
Core
8051
Data Bus Width
8 bit
Data Ram Size
768 B
Interface Type
I2C, SMBus, SPI, UART
Maximum Clock Frequency
50 MHz
Number Of Programmable I/os
17
Number Of Timers
4
Maximum Operating Temperature
+ 85 C
Mounting Style
SMD/SMT
3rd Party Development Tools
KSK-SL-TOOLSTICK, PK51, CA51, A51, ULINK2
Development Tools By Supplier
C8051F350DK
Minimum Operating Temperature
- 40 C
On-chip Adc
24 bit, 8 Channel
On-chip Dac
8 bit, 2 Channel
For Use With
336-1083 - DEV KIT FOR F350/351/352/353
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Eeprom Size
-
Lead Free Status / Rohs Status
Details
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C8051F350/1/2/3
134
Bit7:
Bits6–4: XOSCMD2–0: External Oscillator Mode Bits.
Bit3:
Bits2–0: XFCN2–0: External Oscillator Frequency Control Bits.
CRYSTAL MODE (Circuit from Figure 17.1, Option 1; XOSCMD = 11x)
RC MODE (Circuit from Figure 17.1, Option 2; XOSCMD = 10x)
C MODE (Circuit from Figure 17.1, Option 3; XOSCMD = 10x)
XTLVLD XOSCMD2 XOSCMD1 XOSCMD0
Bit7
R
XTLVLD: Crystal Oscillator Valid Flag.
(Read only when XOSCMD = 11x.)
0: Crystal Oscillator is unused or not yet stable.
1: Crystal Oscillator is running and stable.
00x: External Oscillator circuit off.
010: External CMOS Clock Mode.
011: External CMOS Clock Mode with divide by 2 stage.
100: RC Oscillator Mode.
101: Capacitor Oscillator Mode.
110: Crystal Oscillator Mode.
111: Crystal Oscillator Mode with divide by 2 stage.
RESERVED. Read = 0, Write = don't care.
000–111: See table below:
Choose XFCN value to match crystal or resonator frequency.
Choose XFCN value to match frequency range:
f = 1.23(10
f = frequency of clock in MHz
C = capacitor value in pF
R = Pull-up resistor value in kΩ
Choose K Factor (KF) for the oscillation frequency desired:
f = KF / (C * V
f = frequency of clock in MHz
C = capacitor value the XTAL2 pin in pF
V
DD
XFCN
SFR Definition 17.3. OSCXCN: External Oscillator Control
R/W
Bit6
000
001
010
011
100
101
110
111
= Power Supply on MCU in volts
3
) / (R * C), where
Crystal (XOSCMD = 11x)
DD
590 kHz < f ≤ 1.5 MHz
225 kHz < f ≤ 590 kHz
R/W
Bit5
10 MHz < f ≤ 30 MHz
84 kHz < f ≤ 225 kHz
1.5 MHz < f ≤ 4 MHz
4 MHz < f ≤ 10 MHz
32 kHz < f ≤ 84 kHz
), where
f ≤ 32 kHz
R/W
Bit4
Rev. 1.1
Bit3
—
R
800 kHz < f ≤ 1.6 MHz
1.6 MHz < f ≤ 3.2 MHz
100 kHz < f ≤ 200 kHz
200 kHz < f ≤ 400 kHz
400 kHz < f ≤ 800 kHz
RC (XOSCMD = 10x)
50 kHz < f ≤ 100 kHz
25 kHz < f ≤ 50 kHz
f ≤ 25 kHz
XFCN2
R/W
Bit2
XFCN1
R/W
Bit1
C (XOSCMD = 10x)
SFR Address:
K Factor = 1590
K Factor = 0.87
K Factor = 180
K Factor = 664
K Factor = 2.6
K Factor = 7.7
K Factor = 22
K Factor = 65
XFCN0
R/W
Bit0
0xB1
00000000
Reset Value
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