SI4010-C2-GT Silicon Laboratories Inc, SI4010-C2-GT Datasheet - Page 46

• Manufacturer Part Number: SI4010-C2-GT
• Description: IC TX 27-960MHZ FSK 3.6V 10MSOP
• Manufacturer: Silicon Laboratories Inc
• Series: EZRadio®r
• Type: Crystalless SoC RF Transmitterr

Specifications of SI4010-C2-GT

• Package / Case: 10-MSOP
• Mfg Application Notes: SI4010 Calculator Spreadsheet AppNote
• Frequency: 27MHz ~ 960MHz
• Applications: Garage Openers, RKE, Security Alarms
• Modulation Or Protocol: FSK, OOK
• Data Rate - Maximum: 100 kBaud
• Power - Output: 10dBm
• Current - Transmitting: 19.8mA
• Data Interface: PCB, Surface Mount
• Antenna Connector: PCB, Surface Mount
• Memory Size: 4kB RAM
• Features: 8051 MCU Core, Crystal-less Operation
• Voltage - Supply: 1.8 V ~ 3.6 V
• Operating Temperature: -40°C ~ 85°C
• Operating Frequency: 27 MHz to 960 MHz
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Operating Supply Voltage: 1.8 V to 3.6 V
• Supply Current: 14.2 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant, Lead free / RoHS Compliant
• Other names: 336-1997-5

Si4010-C2
14. LC Oscillator (LCOSC)
The Si4010 VCO is a fully integrated CMOS LC oscillator that operates at approximately 3.9 GHz. This
block in conjunction with a programmable frequency divider generates the transmit carrier frequency. The
technology behind the VCO is based on the Silicon Laboratories Si500 crystal-less oscillator chip and
forms the core of the Si4010s' crystal-less operation. After this device is factory trimmed, the VCO fre-
quency is the most accurate frequency on the chip and sets the chips transmit frequency stability unless an
external crystal oscillator is used. The device achieves ±150 ppm frequency stability over the commercial
temperature range of 0 to 70 °C and ±250 ppm frequency stability over the industrial temperature range of
–40 to 85 °C.
The transmit carrier frequency is set by using the API functions vFCast_Tune (desired carrier) and
vFCast_Setup(). For FSK modulation, the frequency deviation is also a parameter to the freq_adjustment
function. Users are recommended to use the API functions to set the corresponding SFR registers.
14.1. Register Description
SFR Definition 14.1. LC_FSK
SFR Address = 0xE4
46
Name
Reset
6:0
Type
Bit
7
Bit
DEVIATION
Reserved
Name
FSK_
Reserved
[6:0]
R/W
7
0
Programming this register directly is not recommended. Use the vFcast_FskAdj() API
function instead.
FSK Deviation.
These bits determine the FSK deviation. Programming this register directly is not rec-
ommended. Use the vFcast_FskAdj() API function instead.
6
0
5
0
Rev. 1.0
4
0
FSK_DEVIATION[6:0]
Function
R/W
3
0
2
0
1
0
0
0