
3. TECHNICAL BRIEF
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3. TECHNICAL BRIEF
3.2.5 SIM interface (sub board, U600)
Xenon[FM300] supports 1.8V & 2.9V plug in SIM, SIM interface scheme is shown in figure SIM_IO, SIM_CLK,
SIM_RST ports are used to communicate with BBP(S-Gold3) and the SIM power supply enabled by PMIC.
SIM Interface
SIM_CLK : SIM card reference clock
SIM_RST : SIM card Async /sync reset
y
y
SIM_IO : SIM card bidirectional reset
Figure 3.12 SIM Interface
2V6_IO
100n
C600
U600
NCN4555
2
17
5
41
1
31
10
11
6
3
9
8
12
4
61 51
7
C
C
V_
MI
S
OI
4
C
N
NC1
NC3
OI
_
MI
S
SIM_RST
VDD
2
C
N
SIM_CLK
GND
KL
C
STOP_
T
S
R
T
A
B
V
G_SLUG
MOD_VCC
SYS_PWR
100n
C604
SIM_PWR
100n
C605
SIM_RST
SIM_CLK
SIM_DATA
SIM_PWRDOWN
SIM_PWRSEL
TS
RM
IS
KL
CM
IS
AT
AD
MI
S