Circuit Recommended For The Uart Interface - Huawei MC509 Series Hardware Manual

HUAWEI MC509 Series CDMA LGA Module
Hardware Guide
Table 3-7 UART interface signals
Pin
Pin Name
No.
76 UART_TX
78 UART_RX
77 UART_RING
74 UART_RTS
79 UART_DTR
80 UART_CTS
75 UART_DCD
73 UART_DSR

3.5.2 Circuit Recommended for the UART Interface

Figure 3-14 shows the connection of the UART interface in the MC509 module (DCE)
with the host (DTE).
Issue 02 (2013-05-06)
I/
Description
O
O Data sending on the
wireless module
I Data receive end of
the module
Ringing indication on
O
the wireless module
O Data sending request
on the wireless
module
Data terminal ready
I
on the wireless
module
I Clearing to send on
the wireless module
O Data carrier
detection on the
wireless module
Data ready on the
O
wireless module
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Description of the Application Interfaces
Feature
The DTE receives
serial data.
The DTE transmits
serial data.
The DTE is notified of
a remote call.
The DTE notifies the
DCE of sending
requests.
The DTE is ready.
The DCE switches to
the receiving mode.
Data links are
connected.
The DCE is ready.
DC Characteristics (V)
Min. Typ. Max.
–0.3
2.6 2.9
–0.3
2.6 2.9
–0.3
2.6 2.9
–0.3
2.6 2.9
–0.3
2.6 2.9
–0.3
2.6 2.9
–0.3
2.6 2.9
–0.3
2.6 2.9
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