User`s manual

User’s Manual RabbitCore RCM2200 Specifications A–5
A.1.1 Headers
The RabbitCore 2000 uses headers at J4 and J5 for
physical connection to other boards. J4 and J5 are
2 × 13 SMT headers with a 2 mm pin spacing. J1,
the programming port, is a 2 × 5 header with a 2
mm pin spacing.
Figure A–2 shows the layout of another board for
the RabbitCore RCM2200 to be plugged into. These
values are relative to the header connectors.
A.1.2 Physical Mounting
A 9/32” (7 mm) standoff with a 6-32 screw is rec-
ommended to attach RabbitCore RCM2200 to a
user board at the hole position shown in Figure A–2.
A.2 Bus Loading
You must pay careful attention to bus loading when
designing an interface to the RabbitCore RCM2200.
This section provides bus loading information for
external devices.
Table A –3 lists the capacitance for the various Rab-
bitCore 2000 I/O ports.
Figure A–2: User Board Footprint for RabbitCore RCM2200
J5
0.960
(24.4)
0.935
(23.7)
J4
J1
RCM2200 Footprint
0.079
(2.0)
0.130 dia
(3.3)
0.020 sq typ
(0.5)
0.079
(2.0)
0.605
(15.4)
0.645
(16.4)
0.715
(18.2)
Table A –3: Capacitance of Rabbit 2000 I/O Ports
I/O Ports
Input
Capacitance
(pF)
Output
Capacitance
(pF)
Parallel Ports A to E 12 14
Data Lines BD0–BD7 10 12
Address Lines BA0–BA12 4 8