ZTE Corporation ZM8300G Manuale Utente
ZTE ZM8300G Module Hardware User Manual
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PSM_MON is high.
Note: Please connect PSM_MON to the MCU I/O that supports wakeup function.
3.4.7
STATE Signal
The STATE is the indication for module operating state. The state could be designed to be
state indicator interface. The output pulse signalof the interface is used to control the single
color LED indicator. Defined LED state for ZM8300G showed in TABLE3-4
Table 3-4 Status Explanation for the LED Indicator
Indicator
Status
Meaning
solid light
conected to the network
flash
data transmission
solid off
sleep/PSM/not connected/power off
In actual applications, the STATE pin cannot directly drive the LED indicator and needs to
work with a transistor. Select a current limiting resistor for the LED indicator based on the
actual voltage drop and rated current of the LED indicator. When designing an LED
indicator, take ESD measures. Figure 3-8 illustrated the reference circuit.
STATE
ZM8300
STATE
2.2KΩ
b
c
e
VSYS
Figure 3-8 STATE Status Indicator Circuit
3.5 DEBUG_UART Interface
The ZM8300G module provides a two-wire DEBUG_UART serial port for module
debugging. Tests points or JTAG&UART debugging connectors (see section 3.12.2) should
be designed for the two signals. Table 3-5 provides information about pins of the debug