C8051T635-GM Silicon Laboratories Inc, C8051T635-GM Datasheet - Page 107

• Manufacturer Part Number: C8051T635-GM
• Description: IC MCU 2KB 20PIN QFN
• Manufacturer: Silicon Laboratories Inc
• Series: C8051T63xr

Specifications of C8051T635-GM

• Program Memory Type: OTP
• Program Memory Size: 2KB (2K x 8)
• Package / Case: 20-QFN
• Core Processor: 8051
• Core Size: 8-Bit
• Speed: 25MHz
• Connectivity: SMBus (2-Wire/I²C), SPI, UART/USART
• Peripherals: POR, PWM, WDT
• Number Of I /o: 17
• Ram Size: 768 x 8
• Voltage - Supply (vcc/vdd): 1.8 V ~ 3.6 V
• Oscillator Type: Internal
• Operating Temperature: -40°C ~ 85°C
• Processor Series: C8051T6x
• Core: 8051
• Data Bus Width: 8 bit
• Data Ram Size: 768 B
• Interface Type: I2C/SPI/UART
• Maximum Clock Frequency: 25 MHz
• Number Of Programmable I/os: 17
• Number Of Timers: 4
• Operating Supply Voltage: 1.8 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: C8051T630DK
• Minimum Operating Temperature: - 40 C
• Package: 20QFN EP
• Device Core: 8051
• Family Name: C8051T63x
• Maximum Speed: 25 MHz
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• For Use With: 336-1464 - KIT DEV FOR C8051T630 FAMILY
• Eeprom Size: -
• Data Converters: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1463-5

SFR Definition 19.5. OSCXCN: External Oscillator Control
SFR Address = 0xB1
Name
Reset
Bit
6:4
2:0
Type
7
3
Bit
XOSCMD[2:0] External Oscillator Mode Select.
XFCN[2:0]
Unused
Unused
Name
R
7
0
Read = 0; Write = Don’t Care
00x: External Oscillator circuit off.
010: External CMOS Clock Mode.
011: External CMOS Clock Mode with divide by 2 stage.
100: RC Oscillator Mode with divide by 2 stage.
101: Capacitor Oscillator Mode with divide by 2 stage.
11x: Reserved.
Read = 0; Write = Don’t Care
External Oscillator Frequency Control Bits.
Set according to the desired frequency range for RC mode.
Set according to the desired K Factor for C mode.
XFCN
000
001
010
011
100
101
110
111
6
0
XOSCMD[2:0]
RC Mode
f 25 kHz
25 kHz f 50 kHz
50 kHz f 100 kHz
100 kHz f 200 kHz
200 kHz f 400 kHz
400 kHz f 800 kHz
800 kHz f 1.6 MHz
1.6 MHz f 3.2 MHz
R/W
5
0
Rev. 1.0
4
0
Function
R
3
0
C8051T630/1/2/3/4/5
C Mode
K Factor = 7.7
K Factor = 0.87
K Factor = 2.6
K Factor = 22
K Factor = 65
K Factor = 180
K Factor = 664
K Factor = 1590
2
0
XFCN[2:0]
R/W
1
0
0
0
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