Wake-Up Circuit; Trigger Circuit - Newland NLS-EM20 Integration Manual

Wake-Up Circuit

The circuit below is used to wake the engine from sleep mode. The right part shows internal driver circuit
on the decoder board and the left part shows external circuit that users may utilize in actual application.
The nWAKE signal is from Pin 11 of the 12-pin FPC connector.
Users can adjust the external circuit and its function as per actual needs, on condition that the external
circuit matches the internal circuit.
S2
2 3
1 4
B3F-4000
用 户 参 考 电 路
External Circuit

Trigger Circuit

The circuit below is used to provide the engine with an active low signal to activate a scan and decode
session. The right part shows internal driver circuit on the decoder board and the left part shows external
circuit that users may utilize in actual application. The nTrig signal is from Pin 12 of the 12-pin FPC
connector.
Users can adjust the external circuit and its function as per actual needs, on condition that the external
circuit matches the internal circuit.
S3
2 3
1 4
B3F-4000
用 户 参 考 电 路
External Circuit
19
L2
nWAKE
CBW1608/60R
C5 C6
100pF 100pF
Fig. 4-7
L1
CBW1608/60R
C3 C4
100pF 100pF
Fig. 4-8
NRST
R75 0
nWAKE
C33
33pF
主 板 内 部 接 收 电 路
Internal Driver Circuit
nTrig nTrig
C28 C29 C30
33pF 100nF 1nF
主 板 内 部 接 收 电 路
Internal Driver Circuit
VDD
Q3
2N3906
WKUP_TRIG
R73 1.5K R74 0
R69
10K
VDD
Q2
2N3906
R77 0
R33 1.5K
R34
10K
nWAKE_MCU