ZTE Corporation ZM8300G Manuale Utente
ZTE ZM8300G Module Hardware User Manual
<All rights reserved. No distribution without prior permission of ZTE.>
35
uses the 3.3 V level, level conversion is required (TI: TXB0104RUTR). If a customer requires
I
2
S voice, PIN 34 of the ZM8300G module can provide the I
2
S_MCLK signal. Note that PIN 34
is a multiplexing pin. Therefore, to use PIN 34, communicate with ZTE FAE team in advance.
ZM8300
Level
Shift
Codec
IC
VIO
VCCA
OE
VCCB
GND
VCC_3V3
P
C
M
/I
2
S
(1
.8
v
)
A1~A4
GND
GND
B1~B4
P
C
M
/I
2
S
(3
.3
v
)
Figure 3-15 Recommended Audio Circuit
3.11 ADC/MPP Interfaces
3.11.1 Pin Description
The ZM8300G module provides two ADC/MPP interfaces (PIN 42 and PIN 44), which can be
multiplexed as analog multiplexer inputs and current sinks.
1) When working as an ADC analog input interface, the analog multiplexer inputs interface
samples external voltages and temperatures. The input voltage should be within the range of
0 V to 1.8 V.
2) When working as an input current source, the current sinks interface drives an LED
indicator and controls its brightness at 5 mA intervals, with the input current within the range
of 5 mA to 40 mA. When the MPP pin is used to light an indicator, the power consumption of
the ZM8300G module increases.
3.11.2 Design Points
The following figures illustrate the two functions multiplexed on the MPP interface.
ZM8300
MPP
(ADC)
1
0
0
0
p
F
Battery