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4.3 Programming Cable
The programming cable is used to connect the programming port of the RCM4200 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 RCM4200, programs can be downloaded and debugged over the serial interface.
The
connector of the programming cable may be used on header J1 of the RCM4200
DIAG
with the RCM4200 operating in the Run Mode. This allows the programming port to be
used as a regular serial port.
4.3.1 Changing Between Program Mode and Run Mode
The RCM4200 is automatically in Program Mode when the
gramming cable is attached, and is automatically in Run Mode when no programming
cable is attached. When the Rabbit 4000 is reset, the operating mode is determined by the
status of the SMODE pins. When the programming cable's
the SMODE pins are pulled high, placing the Rabbit 4000 in the Program Mode. When the
programming cable's
causing the Rabbit 4000 to operate in the Run Mode.
RESET RCM4200 when changing mode:
Press RESET button (if using Prototyping Board),
Cycle power off/on
after removing or attaching programming cable.
Programming
Cable
Figure 9. Switching Between Program Mode and Run Mode
User's Manual
PROG
connector is not attached, the SMODE pins are pulled low,
3-pin
power connector
Colored
edge
C5
C88
U3
LINK
R47
C15
R49
DS3
R14
R48
SPEED
R52
C25
R50
C19
C26
R29
C18
C7
R4
C20
C31
C6
RX43
C35
C13
C14
C38
C39
R21
R18
RX97
U7
C21 R1 R10
RX49
U6
R22
C28
C29
R16
R11
UX3
PROG
PROG
OR
J1
U1
C1
C2
UX47
J2
L1
C6
+5 V
GND
GND
/RST_OUT
/IORD
C43
+3.3 V
L2
RCM1
/IOWR
/RST_IN
VBAT
PA0
EXT
PA1
PA2
R3
PA3
PA4
R20
R31
JP16
R51
JP6
PA5
PA6
R5
R2
C18
JP5
JP12
R35
PA7
PB0
JP4
JP3
R33
JP14
PB1
PB2
JP8
R32
C16
JP7
PB3
PB4
R41
JP18
C72
JP9
JP10
PB5
PB6
JP11
PB7
PC0
JP10
R25
C78
JP12
C77
PC1
PC2
JP1
Q1
PC3
PC4
JP2
JP15
PC5
PC6
JP9
C85
JP6
JP13
PC7
PE0
R29
JP7
PE1
PE2
JP3
PE3
PE4
JP5
R20
R19
JP4
PE5
PE6
R10
U15
R9
PD0
PE7
LN0
PD1
PD2
LN1
LN2
PD4
PD3
JP8
LN4
LN3
PD5
PD6
LN5
LN6
R9
RX59
RX75
RX55
RX57
PD7
CVT
LN7
R44
R46
VREF
AGND
R39
R45
R42
R43
CX25
DS2
JP25
J3
connector on the pro-
connector is attached,
RESET
1
S1
RESET
BT1
UX49
UX4
RX81
RX83
UX30
RX11
UX10
RX67
UX12
UX14
RX73
CX27
CX23 RX77
RX79
DS3
R21
UX16
R22
R24
R23
GND
1
1
S2
S3
GND
GND
39
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