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GV200G User Manual
Speaker output characteristics
Table 15: The Characteristics of Speaker
Parameter
Load Resistance
Differential output level (peak to
peak)
Rms Output Power
3.6. UART Interface
There are two UART interfaces on GV200G which are named as UART1 and UART2.
UART1 is used for configuration and firmware downloading. UART2 is used to communicate
with external devices like CAN Bus module and RFID reader. PIN 13 is a control signal
which is named as data terminal ready (DTR). When the GV200G is sleeping, a high level on
DTR will wake up UARTs of GV200G.
Please note the UART interfaces are all RS232 level. For RS232 level, valid signals are plus
or minus 3V to 15V and the -3V to +3V is not a valid level. 3V to 15V correspond with logic
0 of TTL level, -3V to -15V correspond with logic 1.
The example connections of UART1 with female DB-9 and UART2 with external devices are
showed as follow.
Figure 19: The connection of UART1 with female DB-9
TRACGV200GUM001
Conditions
Vp = 4.4V, RL = 8 OHM
THD + N < 0.1%
Min Typ Max Unit
8
Ohm
0
8.8
V
900
mW
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