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LZT 123 1836 57
5.11.4 UART2 (DTM2, DFM2)
Pin Name Direction Function
61 RTS2 Input Request To Send (UART2)
62 CTS2 Output Clear To Send (UART2)
63 DTM2 Input Data To Module from host (UART2)
64 DFM2 Output Data From Module to host (UART2)
UART 2 consists of a full duplex serial communication port with transmission,
reception lines and hardware flow control.
Timing and electrical signals characteristics are the same as for UART1, DTM1 and
DFM1, including the baud rate range and the capability to auto-baud.
5.11.4.1 Transmitted Data (DTM2)
DTM2 is used by the application to send data to the wireless modem via UART2. It
has the same electrical characteristics the equivalent signal in UART1.
5.11.4.2 Received Data (DFM2)
DFM2 is used to send data to the application via UART2. It has the same electrical
characteristics as the equivalent signal in UART1.
5.11.4.3 Request to Send (RTS2)
RTS is used to condition the DCE for data transmission. It has the same electrical
characteristics as the equivalent signal in UART1.
5.11.4.4 Clear To Send (CTS2)
CTS is asserted by the DCE to indicate that the host (DTE) may transmit data. It has
the same electrical characteristics as the equivalent signal in UART1.