AW8155B
Jul. 2022 V1.3
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16
COPYRIGHT ©2022 SHANGHAI AWINIC TECHNOLOGY CO. LTD.
STATE 4
Traditional One Wire
Pulse Control
T
LATCH
Shielding abnormal
pulse signal
STATE 3
STATE 4
STATE 4
Anti-interference One
Wire Pulse Control
Figure 11.
Anti-interference One
Wire
Pulse Control Function Diagram
AW8155B select each mode by one-wire pulse control, as shown in figure 12. When CTRL pin pull high form
shutdown mode, there is one rising edge, AW8155B start to work and set Gain=18dB, NCN level=0.65W.
When high-low-high signal set to CTRL pin, there are two rising edges, AW8155B start to work and set
Gain=21.5dB, NCN level=0.85W. When there are three rising edges, internal test mode is enable. When there
are four rising edges, AW8155B start to work in Class AB mode, while gain is to be set 21.5dB.
As shown in figure 12, when CTRL pull down above 1ms, AW8155B will enter shutdown mode.
T
H
T
L
0.75us<T
L
,T
H
<10us
Mode 1
Mode 2
Mode 3
Mode 4
T
OFF
Figure 12.
One-Wire pulse control
When AW8155B work in different mode, PIN CTRL should be low above 1ms which make the AW8155B shut
down, Then series pulse make the AW8155B work in right mode.
MODE2
MODE4
1ms
CTRL
Figure 13.
One-wire pulse mode switch
RNS (RF TDD Noise Suppression)
TDD Noise
Causes
GSM cell phones use TDMA (Time Division Multiple Access) slot sharing technology. The time is divided into
periodic frames in TDMA, and each frame is subdivided into a plurality of time slots. In order to transmit sig-
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