C8051F220-GQ Silicon Laboratories Inc, C8051F220-GQ Datasheet - Page 99

• Manufacturer Part Number: C8051F220-GQ
• Description: IC 8051 MCU 8K FLASH 48TQFP
• Manufacturer: Silicon Laboratories Inc
• Series: C8051F2xxr

Specifications of C8051F220-GQ

• Program Memory Type: FLASH
• Program Memory Size: 8KB (8K x 8)
• Package / Case: 48-TQFP, 48-VQFP
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SPI, UART/USART
• Peripherals: Brown-out Detect/Reset, POR, WDT
• Number Of I /o: 32
• Ram Size: 256 x 8
• Voltage - Supply (vcc/vdd): 2.7 V ~ 3.6 V
• Data Converters: A/D 32x8b
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051F2x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 256 B
• Interface Type: SPI/UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 32
• Number Of Timers: 3
• Operating Supply Voltage: 2.7 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• 3rd Party Development Tools: PK51, CA51, A51, ULINK2
• Development Tools By Supplier: C8051F206DK
• Minimum Operating Temperature: - 40 C
• On-chip Adc: 32-ch x 8-bit
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1241 - DEV KIT F220/221/226/230/231/236
• Eeprom Size: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1238

Bit7:
Bits6–4: XOSCMD2–0: External Oscillator Mode Bits
Bit3:
Bits2–0: XFCN2–0: External Oscillator Frequency Control Bits
CRYSTAL MODE (Circuit from Figure 13.1, Option 1; XOSCMD = 11x)
RC MODE (Circuit from Figure 13.1, Option 2; XOSCMD = 10x)
C MODE (Circuit from Figure 13.1, Option 3; XOSCMD = 10x)
XTLVLD XOSCMD2 XOSCMD1 XOSCMD0
Bit7
R
XFCN
XTLVLD: Crystal Oscillator Valid Flag
(Valid only when XOSCMD = 1xx.)
0: Crystal Oscillator is unused or not yet stable
1: Crystal Oscillator is running and stable
00x: Off. XTAL1 pin is grounded internally.
010: System Clock from External CMOS Clock on XTAL1 pin.
011: System Clock from External CMOS Clock on XTAL1 pin divided by 2.
10x: RC/C Oscillator Mode with divide by 2 stage.
110: Crystal Oscillator Mode
111: Crystal Oscillator Mode with divide by 2 stage.
RESERVED. Read = undefined, Write = don’t care
000–111: see table below
Choose XFCN value to match the crystal frequency. 
Choose oscillation frequency range where:
f = 1.23(10
f = frequency of oscillation in MHz
C = capacitor value in pF
R = Pull-up resistor value in k 
Choose K Factor (KF) for the oscillation frequency desired:
f = KF / (C x AV+) , where
f = frequency of oscillation in MHz
C = capacitor value on XTAL1, XTAL2 pins in pF
V
000
001
010
100
101
011
110
111
DD
SFR Definition 13.2. OSCXCN: External Oscillator Control
R/W
Bit6
= Power supply voltage on MCU in volts
Crystal (XOSCMD = 11x)
2.23 MHz < f  6.74 MHz
30.35 kHz < f  93.8 kHz
12.5 kHz < f  30.3 kHz
722 kHz < f  2.23 MHz
93.8 kHz < f  26 7kHz
267 kHz < f  722 kHz
3
) / (R x C) , where
f > 6.74 MHz
f  12.5 kHz
R/W
Bit5
R/W
Bit4
Rev. 1.6
1.6 MHz < f  3.2 MHz
100 kHz < f  200 kHz
200 kHz < f  400 kHz
400 kHz < f  800 kHz
800 kHz < f  1.6 MHz
RC (XOSCMD = 10x)
50 kHz < f  100 kHz
25 kHz < f  50 kHz
R/W
Bit3
-
f  25 kHz
XFCN2
R/W
Bit2
XFCN1
R/W
Bit1
C (XOSCMD = 10x)
K Factor = 1400
K Factor = 0.44
K Factor = 100
K Factor = 420
K Factor = 1.4
K Factor = 4.4
K Factor = 13
K Factor = 38
C8051F2xx
XFCN0
R/W
Bit0
SFR Address:
Reset Value
00110000
0xB1
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