CB-ACC-53 ConnectBlue, CB-ACC-53 Datasheet - Page 55

• Manufacturer Part Number: CB-ACC-53
• Description: ANTENNA DUAL-BAND RPSMA
• Manufacturer: ConnectBlue

Specifications of CB-ACC-53

• Antenna Type: Whip: 1/2 Wave, Swivel, Tilt (Right Angle)
• Number Of Bands: 2
• Frequency: 2.4GHz, 5GHz
• Gain: 3dBi
• Termination: RP-SMA
• Mounting Type: Connector
• Height (max): 4.21" (107mm)
• Lead Free Status / RoHS Status: Lead free / RoHS Compliant
• Other names: 809-1035

A.2.3.3 GREEN/Switch-1 signal
The GREEN/Switch-1 signal is a multiplexed signal:
The signal is internally pulled-up (16kΩ) to 3.0V for NOT restoring settings to default.
Note! The internal 16kΩ Ω Ω Ω pull-up is smaller than on previous product generations from
connectBlue. This requires a smaller pull-down resistor (1kΩ Ω Ω Ω ) for a low state.
If a LED is used and a switch is required to be able to restore the settings, a high impendence
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 system (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 16kΩ). A design that prevents this can be found in Figure 28.
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-
Figure 23:
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 1kΩ Ω Ω Ω 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).
GREEN - Logic green LED signal (see Chapter 3, Table 14). Becomes valid 500ms after start
up.
Switch-1 - The module reads the status of the signal at startup to decide if the serial inter-
face settings shall be restored (LOW) (see the Serial Port Adapter AT Commands specifica-
tion l for more details). The input signal must be stable for the first 500ms after startup (af-
ter reset/power on reset). The module will restore all factory settings if both the Switch-1
and Switch-0 signals are low during start up.
Switch-1 used together with a
Version 1.16 - 2009-12
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 1kΩ Ω Ω Ω serial resistor.
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