Shanghai SIMCom Wireless Solutions Limited 8PSA301 ユーザーズマニュアル
Smart Machine Smart Decision
24
Module
DET
22R
220nF
USIM Card
22pF
VCC
GND
RST
VPP
CLK
I/O
COM
LDO5_1V8
USIM_VDD
USIM_RST
SUIM_CLK
USIM_DAT
100K
22R
22R
USIM_DET
TVS
C<30pF
Figure 1: USIM card reference circuit
Note:
USIM_DAT has been pulled up with a 10kohm resistor to USIM_VDD in module.
A 220nF shut capacitor on USIM_VDD is used to reduce interference.
A 220nF shut capacitor on USIM_VDD is used to reduce interference.
ADC
SIM8905A provides one 16bits ADC. Its performance parameters are shown as the following table.
Table 15: ADC performance parameters
Parameter
Comments
Min
Typ
Max
Unit
Input voltage range
Programmable
0.1
0.3
-
-
1.7
4.5
V
Resolution
-
16
-
bits
Analog input bandwidth
-
100
-
kHz
Sample rate
XO/8
-
2.4
-
MHz
INL
15-bit output
-
-
±8
LSB
DNL
15-bit output
-
-
±4
LSB
Offset error
Relative to full-scale
-
-
±1
%
Gain error
Relative to full-scale
-
-
±1
%
Vibrator
SIM8905A supports silent incoming-call alarms with its vibration motor driver. The vibration driver is a
programmable voltage output that is referenced to VBAT; when off, its output voltage is VBAT. The motor is
connected between VBAT and the VIB_DRV_N pin. The programmable motor voltage ranges from 1.2 to 3.1 V in
100 mV steps.
programmable voltage output that is referenced to VBAT; when off, its output voltage is VBAT. The motor is
connected between VBAT and the VIB_DRV_N pin. The programmable motor voltage ranges from 1.2 to 3.1 V in
100 mV steps.