Technical data

USING THE UNIVERSAL DEVELOPER'S KIT
74
LZT 123 8020 R1A
To activate or deactivate the Flow Control mechanism, switch
S501 must be set as presented in Table 7 and Table 8
respectively.
Switch Position Function DM-xx CM-4x GM-41 GM/G
M
Position 1 DTMS ON ON ON ON
Position 2 CTS ON ON ON ON
Position 3 DTR ON ON ON ON
Position 4 DFMS ON ON ON ON
Position 5 RTS ON ON ON ON
Position 6 DSR ON ON ON ON
Position 7 Module_Pwr_En_B ON ON ON
WAKE OFF
Table 9: S501 Settings to enable HW Flow Control
Switch
Position
Function DM-xx CM-4x GM-41 GM/GM
47R5/48
Position 1 DTMS ON ON ON ON
Position 2 CTS OFF OFF OFF OFF
Position 3 DTR ON ON ON ON
Position 4 DFMS ON ON ON ON
Position 5 RTS OFF OFF OFF OFF
Position 6 DSR ON ON ON ON
Position 7 Module_Pwr_En_B ON ON ON
WAKE OFF
Table 10: S501 Settings to disable HW Flow Control
If you intend to use the serial interface using the header
connector (JP 301) provided on the developer's board, notice
that appropriate CMOS voltage levels as defined by VDIG in
§3.3 Power Interface shall be connected to the appropriate pins
as follows:
Pin Signal Description Direction
23 DCD Data Carrier Detect O
25 CTS Clear To Send O
26 DTR Data Terminal Ready I
27 TD Serial Data To Module (DTMS) I
28 RTS Request To Send I
30 RD Serial Data From Module (DFMS) O
Table 11: Direction of Serial Data Signals