Rabbitnet Ports - Rabbit RCM3365 User Manual

The Prototyping Board comes with a 220 Ω termination resistor and two 681 Ω bias resis-
tors installed and enabled with jumpers across pins 1–2 and 5–6 on header JP5, as shown
in Figure B-9.
J8
D1
GND NC
GND +3.3 V
VBT
VRAM
C1
/RES SMODE1
D2
SM0
/IORD
/IOWR PG4
L1
PG5 PG6
PG7 PE0
PE1 PE3
PE4
PE5
R12
PE6
PF7
PF5
R67
C8
PB7 PB6 R68
U4
R69
PB5 PB4
R70
PB3 PB2
PB0 /RES_OUT
RCM3300
PROTOTYPING
BOARD
CORE MODULE
GND/EGND
ACT LINK
PD7 PD6
PD2
PD3
PD5 PD4
PG3 PG2
PG1 PG0
PC7 PC6
PC5 PC4
PC3 PC2
PC1 PC0
PF0 PF1
R21 R22
PF2 PF3
PA0 PA1
PA2 PA3
Q1
Q2
JA
PA4 PA5
PA6 PA7
R27 R28
R25 R26
STAT GND
J9
S1 S3
S2
RESET
Figure B-9. RS-485 Termination and Bias Resistors
For best performance, the termination resistors in a multidrop network should be enabled
only on the end nodes of the network, but not on the intervening nodes. Jumpers on boards
whose termination resistors are not enabled may be stored across pins 1–3 and 4–6 of
header JP5.
B.4.7 RabbitNet Ports
The RJ-45 jack labeled RabbitNet is a clocked SPI RS-422 serial I/O expansion port for
use with RabbitNet peripheral boards. The RabbitNet jack does not support Ethernet con-
nections. Header JP3 must have pins 2–3 jumpered when using the RabbitNet port.
The RabbitNet port is enabled in software by setting PD2 = 1. Note that the RabbitNet
port and the J11 interface cannot be used simultaneously.
User's Manual
R1
C2 C3
U2
L293D
L293D
H-DRIVER
H-DRIVER
C4
R13 R14
U1
J10
OUT
00 01 02 03 04 05 06 07
OUT
RP1 RP2
U5
R16
R15
+5 V
GND
+3.3 V
RX13
RX14
CX1
RX15
UX1
SO20W
U8
CX2
C16
R23 R24
UX2
SO20W
Q3
Q4
J13 U9
JB
C22
J12
C23
R50
C24
D4 D5 D6 D7
J14
Q6
R49
CORE
DS2 DS3 DS4 DS5 DS6
TxE RxE GND TxF RxF 485+ GND 485–
JP5
R52 R53 R60 R61
PF0_CLKD
PF0_QD
U3
C5
BT1
RX16
RX17
R39 J15
RX18
485+
UX4
DX1
LCD1JA
U10
6
UX5 C19
R40
DX2
7
U11
U10
R35
R36
485–
JP5
R38
C26
K E Y PA D D I S P L AY B O A R D
L C D 1 J B
6
2 4
1 3 5
U7
RABBITNET
R8 U6 C6
R9
J11
+5 V
GND
+3.3 V
+3.3 V
J16
R36
JP5 bias
681 W
J17
2 1
R42
R38
K 1 termi-
220 W
nation
6 5
U12
R37
D 8 bias
681 W
C29 C30
Q5
R47
L C D 1 J C
95