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4.3 Programming Cable
The programming cable is used to connect the programming port of the RCM3360/
RCM3370 to a PC serial COM port. The programming cable converts the RS-232 voltage
levels used by the PC serial port to the CMOS voltage levels used by the Rabbit 3000.
When the PROG connector on the programming cable is connected to the RCM3360/
RCM3370 programming port, programs can be downloaded and debugged over the serial
interface.
The DIAG connector of the programming cable may be used on header J1 of the RCM3360/
RCM3370 with the RCM3360/RCM3370 operating in the Run Mode. This allows the pro-
gramming port to be used as a regular serial port.
4.3.1 Changing Between Program Mode and Run Mode
The RCM3360/RCM3370 is automatically in Program Mode when the PROG connector
on the programming cable is attached, and is automatically in Run Mode when no pro-
gramming cable is attached. When the Rabbit 3000 is reset, the operating mode is deter-
mined by the status of the SMODE pins. When the programming cable’s PROG connector
is attached, the SMODE pins are pulled high, placing the Rabbit 3000 in the Program
Mode. When the programming cable’s PROG connector is not attached, the SMODE pins
are pulled low, causing the Rabbit 3000 to operate in the Run Mode.
R1
GND
GND
J8
NC
+3.3 V
D1
R52 R53
R60 R61
U7
VBT
/RES
VRAM
SMODE1
C1
C2
C3
PF0_CLKD
PF0_QD
RABBITNET
SM0
/IORD
D2
/IOWR
PG5
PG7
PG4
PG6
PE0
L1
L293D
H-DRIVER
U2
L293D
H-DRIVER
U3
R8 U6 C6
R9
PE1
PE4
PE6
PE3
PE5
R12
U1
J10
R13
C4
OUT
R14
C5
J11
PF7
OUT 00 01 02 03 04 05 06 07
BT1
PF5
PB7
PB5
PB6
PB4
R67
R68
R69
C8
U4
RP1
RP2
PB3
PB2
R70
U5
PB0
/RES_OUT
R16
R15
RCM3300
PROTOTYPING
BOARD
+5 V
+5 V
CORE MODULE
GND
GND
RX13
ACT
PD7
PD3
LINK
PD6
PD2
GND/EGND
CX1
+3.3 V
RX14
RX15
RX16
RX17
RX18
R39 J15
+3.3 V
J16
PD5
PD4
PG3
PG1
PG2
PG0
UX1
SO20W
DX1
UX4
LCD1JA
Programming Cable
PC7
PC5
PC3
PC1
PC6
PC4
PC2
PC0
U8
C16
CX2
DX2
UX5
R40
C19 R42
K1
J17
R27 R28
PF0
PF2
PA0
PA2
PA4
PA6
STAT
J9
PF1
PF3
PA1
PA3
PA5
PA7
GND
JA
R25 R26
R21 R22 R23 R24
Q1 Q2 Q3 Q4
J12
R50
D4
Q6
D5
JB
D6
D7
J13
J14
UX2
SO20W
C22
C23
C24
U9
R36
JP5
C26
U10
R35
R38
U11
U12
D8
K E Y PA D D I S P LAY B O A R D
To
C29 C30
PC COM port
Q5 R47
R49
Colored edge
S1
RESET
S2
S3
CORE
DS2 DS3 DS4 DS5 DS6
TxE RxE GND TxF RxF 485+ GND 485?
LC D 1J B
LC D 1J C
RESET
RESET RCM3360/RCM3370 when changing mode:
Momentarily short out pins 28?32 on RCM3360/RCM3370 header J4, OR
Press RESET button (if using Prototyping Board), OR
Remove, then reapply power
after removing or attaching programming cable.
Figure 8. Switching Between Program Mode and Run Mode
30
RabbitCore RCM3360/RCM3370
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