Serial Programming Cable; Changing Between Program Mode And Run Mode - Rabbit RCM3365 User Manual

4.3 Serial Programming Cable

The programming cable is used to connect the serial programming port of the RCM3365/
RCM3375 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 connector on the programming cable is connected to the RCM3365/
PROG
RCM3375 serial programming port at header J1, programs can be downloaded and
debugged over the serial interface.
The connector of the programming cable may be used on header J1 of the RCM3365/
DIAG
RCM3375 with the RCM3365/RCM3375 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 RCM3365/RCM3375 is automatically in Program Mode when the
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 state of the SMODE pins. When the programming cable's
is attached, the SMODE pins are pulled high, placing the Rabbit 3000 in the Program
Mode. When the programming cable's
are pulled low, causing the Rabbit 3000 to operate in the Run Mode.
J8
GND NC
GND +3.3 V
VBT VRAM
/RES SMODE1
D2
SM0 /IORD
/IOWR PG4
L1
PG5 PG6
PG7 PE0
PE1 PE3
PE4 PE5
R12
PE6
PF7
PF5
R67
R68
PB7 PB6
R69
PB5 PB4
R70
PB3 PB2
PB0
/RES_OUT
RCM3300
PROTOTYPING
BOARD
ACT LINK
PD6
PD7
PD2
PD3
PD5 PD4
PG3 PG2
PG1 PG0
PC7 PC6
PC5 PC4
PC3 PC2
PC1 PC0
PF0 PF1
PF2 PF3
PA0 PA1
PA2 PA3
PA4 PA5
PA6 PA7
R25 R26
STAT GND
J9
S1
RESET
RESET RCM3365/RCM3375 when changing mode:
Momentarily short out pins 28–32 on RCM33600/RCM33610 header J4,
Press RESET button (if using Prototyping Board),
Cycle power off/on
after removing or attaching programming cable.
Figure 9. Switching Between Program Mode and Run Mode
36
PROG
R1
D1
C1
C2 C3
U2
L293D
L293D
H-DRIVER
H-DRIVER
C4
R13
U1 J10
OUT
OUT 00 01 02 03 04 05 06 07
RP1 RP2
C8
U4
U5
R16
R15
+5 V
CORE MODULE
GND/EGND
+3.3 V
RX13
RX14
CX1
RX15
UX1
SO20W
U8
CX2
C16
R21 R22 R23 R24
UX2
SO20W
Q1 Q2 Q3 Q4
J13 U9
JA JB
C22
J12
R27 R28
C23
R50
D4 D5 D6 D7 C24
J14
Q6
R49
CORE
S2 S3
DS2 DS3 DS4 DS5 DS6 TxE RxE GND TxF RxF 485+ GND 485–
connector is not attached, the SMODE pins
R52 R53 R60 R61
U7
PF0_CLKD
PF0_QD
U3
R14 C5
BT1
+5 V
GND
+3.3 V
RX16
RX17
R39 J15
RX18
UX4
DX1
LCD1JA
UX5 C19 R42
R40
DX2
U11 U12
U10
D 8
R35
R36
JP5
R38
C26 K E Y PA D D I S P L AY B O A R D
Colored edge
L C D 1 J B
OR
RabbitCore RCM3365/RCM3375
connector
PROG
connector
PROG
RABBITNET
R8 U6 C6
R9
J11
GND
J16
J17
K 1
To
PC COM port
C29 C30
Q5
R47
L C D 1 J C
OR