Analog Audio Interface - SIM Tech SIMCom SIM7100-PCIE Hardware Design

Data Ordering
Note: PCM interface can be control by AT command. For more details please refer to document [1] and
document [2]
Table 15: PCM DC Characteristics
Symbol Parameter
V High-level input voltage
IH
V Low-level input voltage
IL
V High-level output voltage
OH
V Low-level output voltage
OL

Analog Audio Interface

4.10.2
SIM7100-PCIE(A) provides one analog signal output and one analog input optionally. MIC1P/N is used as
microphone, EAR1P/N is used as audio output. Regarding audio parameters configuration, please refer to the ATC
manual.
Table 16: MIC input characteristics
Parameter
Working Voltage
Working Current
External Microphone Load Resistance
Table 17: Audio output characteristics
Parameter
Normal
Differential
(EAR_P,EAR_N)
SIM7100-PCIEA_Hardware_Design
2014-11-03
MSB
Min
1.26
-0.3
1.35
0
Min
70
1.2
Load resistance
Output power
Figure 13: Receiver interface configuration
Smart Machine Smart Decision
Type Max
1.8 2.1
0 0.63
1.8 1.8
0 0.45
Typ Max
1.80
400
2.2
Min Typ Max
27 32 -
- 70 -
28
Unit
V
V
V
V
Unit
V
uA
k Ohms
Unit
Ohm
mW