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Hardware Connections
To facilitate handling the Prototyping Board, snap in the four standoffs to the four holes at the corners
on the bottom side of the Prototyping Board before continuing with the remaining steps.
1. Attach Module to
Prototyping Board
Turn the RCM3720 module so that
the Ethernet jack is on the left as
shown in Figure 1 below. Insert the
module's J1 header into the J5 socket
on the Prototyping Board. The shaded
corner notch at the bottom right cor-
ner of the RCM3720 module should
face the same direction as the corre-
sponding notch below it on the Proto-
typing Board.
NOTE: It is important that you
line up the pins on header J1 of
the RCM3720 module exactly
with the corresponding pins of
the J5 socket on the Prototyping
Board. The header pins may
become bent or damaged if the
pin alignment is offset, and the
module will not work. Perma-
nent electrical damage to the
module may also result if a mis-
aligned module is powered up.
Press the module's pins firmly into the Prototyping Board socket.
2. Connect Programming Cable
The programming cable connects the RCM3720 to the PC running Dynamic C to download programs
and to monitor the RCM3720 module during debugging.
Attach the DE9 connector end of the programming cable to a COM (serial) port on the PC. Dynamic C
uses a COM port to communicate with the target system. The default selection is COM1, but you can
select a different COM port when you install Dynamic C or when you run it.
Connect the 10-pin connector of the programming cable labeled PROG to header J2 on the RCM3720
as shown in Figure 2. Be sure to orient the marked (usually red) edge of the cable towards pin 1 of
header J2. (Do not use the DIAG connector, which is used for a regular serial connection.)
NOTE: Be sure to use the programming cable (part number 101-0542) supplied with this kit that
has blue shrink wrap around the RS-232 converter section located in the middle of the cable.
Programming cables from other Z-World or Rabbit Semiconductor kits were not designed to
work with RCM3720 modules.
NOTE: Some PCs now come equipped only with a USB port. It may be possible to use some
RS-232/USB converters with the programming cable supplied with the Ethernet Connection
Kit. An RS-232/USB converter is available through the Z-World Web store.
RCM3720
C12
R6
J5
J2
BT1
RCM3720 PROTOTYPING BOARD
CX1
CX3
CX5
CX7
UX7
RX7
RX8
CX9
RX9
CX10
RX10
UX1
UX8
RX11
RX12
CX11
RX13
CX12
RX14
UX9
RX15
UX2
CX13
RX16
CX14
UX3
Figure 1. Install the RCM3720 Module
on the Prototyping Board
Align shaded
corners
Standoffs inserted
in mounting holes
C13 C10
C14
U3
J5
U2
C7
C2
C9 D1
C1
J4
PF4
SW1
PB7
SW2
PF6
DS1
PF7
DS2
C5
C8
C3
C4
U1
C6
+5V
GND
J6
J1
J3
S3
3
1
2
4
R4
1
3
2
4
R5
1
3
2
4
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