WM620 Hardware User Guide
V1.1
All rights reserved by Shenzhen Neoway Technology Co., Ltd.
Page 8
Figure 2-6a
Figure 2-6b
2.3.2 Ring
PIN
Signal Name
I/O
Function Description
DC Characteristics (V)
51
RING
O
Ring
output
Min
typical
max
-0.3
2.6
2.9
When a phone call is coming, the RING pin will issue several low level pulses. Shows in Figure 2-7.
Figure 2-7
When WM620 receives a SMS, the RING pin will issue one low level pulse, Shown in Figure 2-8. The pulse
width can be configured through an AT command. For more specific, please refer to the WM620’s AT
command manual.
Figure 2-8
