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Hardware Integration Guide
6.3.
ON/OFF Control
The AirPrime AR7558 provides an interface for controlling the device ON/OFF state.
Table 35.
ON/OFF Control Pads
Pad
Name
BB1
ON/OFF
The ON/OFF signal is internally pulled up to an internal 1.8V reference voltage. An open drain
transistor should be connected to this pin to generate a low pulse. This pin should not be driven high
external to the AirPrime AR7558 embedded module.
Table 36.
ON/OFF Internal Pull-Up
Signal
Parameter
ON/OFF
Internal Pull-up
6.3.1.
ON/OFF Timing
The ON/OFF pin is a low pulse toggle control. The first pulse powers the AirPrime AR7558 ON, a
second pulse instructs the AirPrime AR7558 to begin the Shutdown process.
The diagram below illustrates the recommended application implementation for ON/OFF control.
VBATT
VCC_1V8
ON/OFF
Figure 10.
Recommended ON/OFF Control
The diagram below illustrates an alternate application implementation that holds ON/OFF low during
operation.
4116922
Direction
Input
t
ON
Power ON
Pulse
Rev 1.1
Baseband Specification
Function
ON/OFF Control
Min
Typ
-
200
t
pwroff
t
OFF
Power OFF
Pulse
January 21, 2015
If Unused
Must Be Used
Max
Units
-
kΩ
t
pwrrmv
32
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