SI1011-A-GM Silicon Laboratories Inc, SI1011-A-GM Datasheet - Page 209

• Manufacturer Part Number: SI1011-A-GM
• Description: IC TXRX MCU + EZRADIOPRO
• Manufacturer: Silicon Laboratories Inc

Specifications of SI1011-A-GM

• Package / Case: 42-QFN
• Frequency: 240MHz ~ 960MHz
• Data Rate - Maximum: 256kbps
• Modulation Or Protocol: FSK, GFSK, OOK
• Applications: General Purpose
• Power - Output: 20dBm
• Sensitivity: -121dBm
• Voltage - Supply: 1.8 V ~ 3.6 V
• Current - Receiving: 18.5mA
• Current - Transmitting: 85mA
• Data Interface: PCB, Surface Mount
• Memory Size: 8kB Flash, 768B RAM
• Antenna Connector: PCB, Surface Mount
• Number Of Receivers: 1
• Number Of Transmitters: 1
• Wireless Frequency: 240 MHz to 960 MHz
• Interface Type: UART, SMBus, SPI, PCA
• Output Power: 20 dBm
• Operating Supply Voltage: 0.9 V to 3.6 V
• Maximum Operating Temperature: + 85 C
• Mounting Style: SMD/SMT
• Maximum Supply Current: 4 mA
• Minimum Operating Temperature: - 40 C
• Modulation: FSK, GFSK, OOK
• Protocol Supported: C2, SMBus
• Core: 8051
• Program Memory Type: Flash
• Program Memory Size: 8 KB
• Data Ram Size: 768 B
• Supply Current (max): 4 mA
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Operating Temperature: -
• Lead Free Status / Rohs Status: Lead free / RoHS Compliant
• Other names: 336-1872-5

SFR Definition 20.3. RTC0DAT: SmaRTClock Data
SFR Page= 0x0; SFR Address = 0xAD
20.2. SmaRTClock Clocking Sources
The SmaRTClock peripheral is clocked from its own timebase, independent of the system clock. The
SmaRTClock timebase can be derived from an external CMOS clock, the internal LFO (‘F912 and ‘F902
devices only), or the SmaRTClock oscillator circuit, which has two modes of operation: Crystal Mode, and
Self-Oscillate Mode. The oscillation frequency is 32.768 kHz in Crystal Mode and can be programmed in
the range of 10 kHz to 40 kHz in Self-Oscillate Mode. The internal LFO frequency is 16.4 kHz ±20%. The
frequency of the SmaRTClock oscillator can be measured with respect to another oscillator using an on-
chip timer. See Section “27. Timers” on page 338 for more information on how this can be accomplished.
Note: The SmaRTClock timebase can be selected as the system clock and routed to a port pin. See Section
20.2.1. Using the SmaRTClock Oscillator with a Crystal or External CMOS Clock
When using Crystal Mode, a 32.768 kHz crystal should be connected between XTAL3 and XTAL4. No
other external components are required. The following steps show how to start the SmaRTClock crystal
oscillator in software:
1. Set SmaRTClock to Crystal Mode (XMODE = 1).
2. Disable Automatic Gain Control (AGCEN) and enable Bias Doubling (BIASX2) for fast crystal startup.
3. Set the desired loading capacitance (RTC0XCF).
4. Enable power to the SmaRTClock oscillator circuit (RTC0EN = 1).
5. Wait 20 ms.
6. Poll the SmaRTClock Clock Valid Bit (CLKVLD) until the crystal oscillator stabilizes.
7. Poll the SmaRTClock Load Capacitance Ready Bit (LOADRDY) until the load capacitance reaches its
8. Enable Automatic Gain Control (AGCEN) and disable Bias Doubling (BIASX2) for maximum power
9. Enable the SmaRTClock missing clock detector.
10.Wait 2 ms.
Note: Read-modify-write instructions (orl, anl, etc.) should not be used on this register.
Name
Reset
Type
7:0
Bit
Bit
programmed value.
savings.
“19. Clocking Sources” on page 194 for information on selecting the system clock source and Section “21. Port
Input/Output” on page 219 for information on how to route the system clock to a port pin. On ‘F912 and ‘F902
devices, the SmaRTClock timebase can be routed to a port pin while the device is in its ultra low power sleep
mode. See the PMU0MD register description for details.
RTC0DAT SmaRTClock Data Bits.
Name
7
0
Holds data transferred to/from the internal SmaRTClock register selected by
RTC0ADR.
6
0
5
0
Rev. 1.0
RTC0DAT[7:0]
4
0
R/W
Function
3
0
Si1010/1/2/3/4/5
2
0
1
0
0
0
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