Cinterion
®
ELS81-US Hardware Interface Description
3.2 Power Up/Power Down Scenarios
77
els81-us_hid_v01.004
2017-09-27
Confidential / Preliminary
Page 56 of 107
Figure 29:
Sample circuit for applying power using an external µC
3.8V
Module
Place C2-C5 close to module
µ
controller
ENABLE
VBATT
VBATT_IN
C1
10
0nF
C2
47
µ
F
,X
5R
C3
47
µ
F
,X
5R
C4
47
µ
F
,X
5R
C5
47
µ
F
,X
5R
C6
47
µ
F
,X
5R
R1
100
k
R2
100k
R3
100
k
R6
10k
T1
T2
IRML6401
BC847