User's Manual

GE864-QUAD V2 Hardware User Guide
1vv0300841 Rev.0.1 24/11/09
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The signals of the GE864-QUAD V2 serial port are:
RS232
Pin
Number
Signal GE864-
QUAD V2
Pad
Number
Name Usage
1 DCD - dcd_uart D9 Data Carrier Detect Output from the GE864-QUAD V2 that indicates the
carrier presence
2 RXD - tx_uart H8 Transmit line *see Note Output transmit line of GE864-QUAD V2 UART
3 TXD - rx_uart E7 Receive line *see Note Input receive of the GE864-QUAD V2 UART
4 DTR - dtr_uart B7 Data Terminal Ready Input to the GE864-QUAD V2 that controls the DTE
READY condition
5 GND A1,F1,H1
L1, H2, L2,
J3, K3….
Ground ground
6 DSR - dsr_uart E11 Data Set Ready Output from the GE864-QUAD V2 that indicates the
module is ready
7 RTS -rts_uart F7 Request to Send Input to the GE864-QUAD V2 that controls the
Hardware flow control
8 CTS - cts_uart F6 Clear to Send Output from the GE864-QUAD V2 that controls the
Hardware flow control
9 RI - ri_uart B6 Ring Indicator Output from the GE864-QUAD V2 that indicates the
incoming call condition
NOTE: According to V.24, RX/TX signal names are referred to the application side, therefore on
the GE864 side these signal are on the opposite direction: TXD on the application side will be
connected to the receive line (here named TXD/ rx_uart ) of the GE864-QUAD V2 serial port
and viceversa for RX.
TIP: For a minimum implementation, only the TXD and RXD lines can be connected, the other
lines can be left open provided a software flow control is implemented.