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
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