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參數資料
| 型號： | CB-ACC-36 |
| 廠商： | ConnectBlue |
| 文件頁數： | 55/58頁 |
| 文件大小： | 510K |
| 描述： | ANTENNA 1/2WV 2.4GHZ 10CM RPSMA |
| 標準包裝： | 1 |
| 天線類型： | 鞭狀：1/2 波，偶極 |
| 頻帶數目： | 1 |
| 頻率： | 2.4GHz |
| 增益： | 2.5dBi |
| 端子： | RP-SMA |
| 安裝類型： | 連接器 |
| 高度（最大）： | 3.93"（100mm） |
| 包裝： | 散裝 |
| 產品目錄頁面： | 558 (CN2011-ZH PDF) |
| 其它名稱： | 809-1001 |
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Version 1.17 2011-09
55
A.2.3.3 GREEN/Switch-1 signal
The GREEN/Switch-1 signal is a multiplexed signal:
- GREEN - Logic green LED signal (see Chapter 3, Table 14). Becomes valid 500ms af-
ter start up.
- Switch-1 - The module reads the status of the signal at startup to decide if the serial in-
terface settings shall be restored (LOW) (see the Serial Port Adapter AT Commands
specification l for more details). The input signal must be stable for the first 500ms after
startup (after reset/power on reset).
The signal is internally pulled-up (16k&) to 3.0V for NOT restoring settings to default.
Note! The internal 16k&& && pull-up is smaller than on previous product generations from
connectBlue. This requires a smaller pull-down resistor (1k&& &&) for a low state.
If a LED is used and a switch is required to be able to restore the settings, a high impend-
ence buffer need to prevent the signal from being pulled-up via the LED. A 74HC08 logic
gate can be used in a 3/3.3V system (see Figure 23) and a 74HCT08 logic gate in a 5V sys-
tem (see Figure 24).
Both gates are available in a single gate package (74AHC1G08/74AHCT1G08).
Sometimes, over time, switch contacts can get an oxide layer. This may cause the closed
switch resistance to become too high to sink the signal to logic LOW (the signal is internally
pulled-up to 16k&). A design that prevents this can be found in Figure 28.
Figure 23: Switch-1 used together with a
green LED in a 3.3V host system. The status
of the signal can also be used as input to a
host controller. Notice the 1k&
& &
& serial resistor.
Figure 24: Switch-1 used together with a green
LED in a 5V host system. The status of the
signal can also be used as input to a host
controller. Notice the 1k&
& &
& serial resistor.
The buffer can be removed in a 3.3V system if no restore switch is required (see Figure 25).
In a 5V system the high state output (2.8V) from the module is not enough to turn off the
LED, so a 74HCT08 buffer can be used to raise the high level to 5V (see Figure 26).
The 74HCT08 gate is also available in a single gate package (74AHCT1G08).
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相關代理商/技術參數 |
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| CB-ACC-38 | 功能描述:ANTENNA CABLE 12CM U.FL/RPSMA RoHS:是 類別:電纜組件 >> 同軸，RF 系列:- 標準包裝:1 系列:* |
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| CB-ACC-53 | 制造商:connectBlue 功能描述:ANTENNA DUAL-BAND RPSMA |
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