Programming Cable; Changing Between Program Mode And Run Mode - Rabbit RabbitCore RCM4100 User Manual

4.3 Programming Cable

The programming cable is used to connect the programming port of the RCM4100 series
of modules 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 4000.
When the connector on the programming cable is connected to the programming
PROG
port on the RCM4100, programs can be downloaded and debugged over the serial interface.
The connector of the programming cable may be used on header J1 of the RCM4100
DIAG
modules with the RCM4100 modules 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 RCM4100 modules are 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 4000 is reset, the operating mode is deter-
mined by the status of the SMODE pins. When the programming cable's
is attached, the SMODE pins are pulled high, placing the Rabbit 4000 in the Program
Mode. When the programming cable's
are pulled low, causing the Rabbit 4000 to operate in the Run Mode.
RESET RCM4100 when changing mode:
Press RESET button (if using Prototyping Board),
Cycle power off/on
after removing or attaching programming cable.
Programming
Figure 8. Switching Between Program Mode and Run Mode
36
PROG
3-pin
power connector
Cable
Colored
edge
C5
R13
C25 C19
C26 C20
C30
C31
C18
U3
C36
C38
C39
C27 R18
C15
C29
Q1
C28 R21
R19
C23
R22 R17 R16
RX43
RX97
RX49 RX55
UX3
connector is not attached, the SMODE pins
OR
J1
U1
C1
C2
BT1
UX49
UX47
J2
L1
C6 +5 V
GND
GND
/RST_OUT /IORD
+3.3 V
RCM1
/IOWR /RST_IN
VBAT
PA0
EXT
R12
PA1 PA2
C6 PA3 PA4
C7
JP16
JP6 PA5 PA6
JP5
JP12
R3
PA7 PB0
JP4
JP3
JP14 PB1 PB2
JP1
JP8
C16 JP7
PB3 PB4
JP18 JP2
JP9
JP10 PB5 PB6
JP9
JP6 PB7 PC0
R25
C21
JP7
PC1 PC2
JP3
PC3 PC4
R9
R11
RP1
JP5
PC5 PC6
R10 JP4
PC7 PE0
C1
R29 U1
C15
PE1 PE2
C16
C2
C17
PE3 PE4
R20
R19
PE5 PE6
R10
R9
PD0
PE7
LN0
C4
PD1 PD2
LN1 LN2
PD4
PD3
LN4
LN3
PD5 PD6
LN5 LN6
RX59
RX75
RX57
PD7
CVT RX73
LN7
VREF AGND
CX25
DS2
JP25
R23
J3
S2
connector
PROG
connector
PROG
RESET
1
S1
RESET
UX4
RX81
RX83
UX30
RX11
UX10
RX67
UX12
UX14
CX27
CX23 RX77 RX79
DS3
R21
UX16
R22 R24
GND
1 1
S3
GND GND
RabbitCore RCM4100