SI1011-A-GM Silicon Laboratories Inc, SI1011-A-GM Datasheet - Page 277

• 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

amble detection threshold. A shorter Preamble Detection Threshold may be chosen if occasional false
detections may be tolerated. When antenna diversity is enabled a 20-bit preamble detection threshold is
recommended. When the receiver is synchronously enabled just before the start of the packet, a shorter
preamble detection threshold may be used. Table 23.5 demonstrates the recommended preamble detec-
tion threshold and preamble length for various modes.
It is possible to use the transceiver in a raw mode without the requirement for a 010101... preamble. Con-
tact customer support for further details.
Note: The recommended preamble length and preamble detection threshold listed above are to achieve 0% PER.
23.6.8. Invalid Preamble Detector
When scanning channels in a frequency hopping system it is desirable to determine if a channel is valid in
the minimum amount of time. The preamble detector can output an invalid preamble detect signal. which
can be used to identify the channel as invalid. After a configurable time set in Register 60h[7:4], an invalid
preamble detect signal is asserted indicating an invalid channel. The period for evaluating the signal for
invalid preamble is defined as (inv_pre_th[3:0] x 4) x Bit Rate Period. The preamble detect and invalid pre-
amble detect signals are available in "Register 03h. Interrupt/Status 1" and “Register 04h. Interrupt/Status
2.”
23.6.9. Synchronization Word Configuration
The synchronization word length for both TX and RX can be configured in Reg 33h, synclen[1:0]. The
expected or transmitted sync word can be configured from 1 to 4 bytes as defined below:




The sync is transmitted or expected in the following sequence: sync 3  sync 2  sync 1  sync 0. The sync
word values can be programmed in Registers 36h–39h. After preamble detection the part will search for
sync for a fixed period of time. If a sync is not recognized in this period then a timeout will occur and the
search for preamble will be re-initiated. The timeout period after preamble detections is defined as the
value programmed into the sync word length plus four additional bits.
+Antenna Diversity Enabled
+Antenna Diversity Enabled
OOK + Antenna Diversity
synclen[1:0] = 00—Expected/Transmitted Synchronization Word (sync word) 3.
synclen[1:0] = 01—Expected/Transmitted Synchronization Word 3 first, followed by sync word 2.
synclen[1:0] = 10—Expected/Transmitted Synchronization Word 3 first, followed by sync word 2,
followed by sync word 1.
synclen[1:0] = 1—Send/Expect Synchronization Word 3 first, followed by sync word 2, followed by sync
word 1, followed by sync word 0.
(G)FSK AFC Disabled
(G)FSK AFC Disabled
(G)FSK AFC Enabled
(G)FSK AFC Enabled
They may be shortened when occasional packet errors are tolerable.
Enabled
Mode
OOK
Table 23.5. Minimum Receiver Settling Time
Settling Time
Approximate
Receiver
1 byte
2 byte
1 byte
2 byte
2 byte
8 byte
Rev. 1.0
Recommended Preamble
Detection Threshold
Length with 8-Bit
20 bits
28 bits
3 byte
—
—
—
Si1010/1/2/3/4/5
Recommended Preamble
Detection Threshold
Length with 20-Bit
32 bits
40 bits
64 bits
8 byte
4 byte
8 byte
277