GND
J1
STOP MOD
IP4 IP5
1
2
D3
3
12
1
V2
V
DD
C2
10
mF
SIM_I / O
IP8
1
1
1
1
1
SIM_CLK SIM_RST
IP6
IP7
CLK
1
1
CLK RST I / O
IP1 IP2 IP3
V
DD
IP10
1
GND
MBRA140T3
V
DD
SIM_CLK
11
9SIM_RST
8 SIM_I / O
10
GND
6
7
SIM_V
CC
J8
NC
R2
V
BAT
D4
2
100 nF的
1
C1
1
D1
R1
2.2 k
V
BAT
10 k
R3
2
停止
1
S1
S2
NC
NC
NC
NC
NC
MOD_V
CC
1
V1
V
BAT
2
10 k
J2
RST
GND
J3
I / O
GND
J4 STOP
NCN4555
评估板和PCB指南
图12. NCN4555工程测试板原理图
http://onsemi.com
MBRA140T3
GND
GND
J9
GND
J10
GND
J11
GND
10
V
DD
NC
13
CLK SIM_CLK
14
RST SIM_RST
15
I / O
SIM_I / O
16
NC
GND
GND_EXP
1停止
2
MOD_V
CC
4
NC
NC
5
V
BAT
SIM_V
CC
4
C4
3
CLK
2
RST
1
V
CC
8
NC
C8
7
I / O
6
NC
V
DD
5
GND
SIM_CARD
V
DD
CON2
IP9
R5
R6
POI2
2.2 k
GND
J5
MOD_V
CC
NC
NC
SENSE_SIM_V
CC
GND
GND
GND
Q1
2N2222
12
11
10
9
8
7
6
5
4
3
2
1
J6
控制& I / O
GND
