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參數(shù)資料
| 型號： | SN260Q |
| 廠商： | STMICROELECTRONICS |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | LOCAL AREA NETWORK CONTROLLER, QCC40 |
| 封裝： | 6 X 6 MM, 0.90 MM HEIGHT, ROHS COMPLIANT, MQ220, QFN-40 |
| 文件頁數(shù)： | 13/47頁 |
| 文件大?。?/td> | 1592K |
| 代理商： | SN260Q |
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Functional description
SN260
6.11.2
Internal RC oscillator
The SN260 has a low-power, low-frequency RC oscillator that runs all the time. Its nominal
frequency is 10 kHz.
The RC oscillator has a coarse analog trim control, which is first adjusted to get the
frequency as close to 10 kHz as possible. This raw clock is used by the chip management
block. It is also divided down to 1kHz using a variable divider to allow software to accurately
calibrate it. This calibrated clock is used by the sleep timer.
Timekeeping accuracy depends on temperature fluctuations the chip is exposed to, power
supply impedance, and the calibration interval, but in general it will be better than 150 ppm
(including crystal error of 40 ppm).
Table 6 lists the specifications of the RC oscillator.
6.12
Random number generator
The SN260 allows for the generation of random numbers by exposing a randomly generated
bit from the RX ADC. Analog noise current is passed through the RX path, sampled by the
receive ADC, and stored in a register. The value contained in this register could be used to
seed a software-generated random number. The EmberZNet stack utilizes these random
numbers to seed the random MAC backoff and encryption key generators.
Crystal ESR
Load capacitance of 10pF
100
Ω
Crystal ESR
Load capacitance of 18pF
60
Ω
Start-up time to stable
clock (max. bias)
1ms
Start-up time to stable
clock (optimum bias)
2ms
Current consumption
Good crystal: 20
Ω ESR, 10pF load
0.2
0.3
mA
Current consumption
Worst-case crystals (60
Ω, 18pF or
100
Ω, 10pF)
0.5
mA
Current consumption
At maximum bias
1
mA
Table 5.
High-frequency crystal specifications (continued)
Parameter
Test conditions
Min.
Typ.
Max.
Unit
Table 6.
RC oscillator specifications
Parameter
Test conditions
Min.
Typ.
Max.
Unit
Frequency
10
kHz
Analog trim steps
1
kHz
Frequency variation with supply
For a voltage drop from 3.6V
to 3.1V or 2.6V to 2.1V
0.75
1.5
%
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|---|---|
| SN260QT | 功能描述:射頻收發(fā)器 ZIGBEE 802.15.4 NETWORK PROCESSOR RoHS:否 制造商:Atmel 頻率范圍:2322 MHz to 2527 MHz 最大數(shù)據(jù)速率:2000 Kbps 調(diào)制格式:OQPSK 輸出功率:4 dBm 類型: 工作電源電壓:1.8 V to 3.6 V 最大工作溫度:+ 85 C 接口類型:SPI 封裝 / 箱體:QFN-32 封裝:Tray |
| SN2634 | 制造商:Omron Corporation 功能描述:RELAY ASSEMBLY |
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