Serial Programming Cable; Changing Between Program Mode And Run Mode - Rabbit RabbitCore RCM3400 User Manual

4.3 Serial Programming Cable

The programming cable is used to connect the serial programming port of the RCM3400
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 programming
PROG
header on the RCM3400 Prototyping Board, programs can be downloaded and debugged
over the serial interface.
The connector of the programming cable may be used on header J2 of the RCM3400
DIAG
Prototyping Board with the RCM3400 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 RCM3400 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 3000 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 3000 in the Program Mode. When the
programming cable's
causing the Rabbit 3000 to operate in the Run Mode.
PC COM port
PA0 PA1
PA2 PA3
PA4 PA5
PA6 PA7
PB1 PB2
PB3 PB4
PB5 PB6
PB7 PC0
PC1 PC2
PC3 PC6
PC7 /IORD
/IOWR STAT
SMODE1 SMD0
PD0 PD4
PD5 PD6
PD7 PE0
PE1 PE2
PE4 PE5
PE6 PE7
PF0 PF1
PF4 PF5
PF6 PF7
PG0 PG1
PG2 PG3
PG4 PG5
PG6 PG7
/RES OUT RESET IN
+3.3 V GND
VBAT +3.3 V
GND GND
C1
IR1
R1
R2
RCM3400
PROTOTYPING
BOARD
Figure 7. Switching Between Program Mode and Run Mode
User's Manual
PROG connector is not attached, the SMODE pins are pulled low,
To
Colored
edge
C19 C21
U4
C5
C28
R10
R46
C7
C18 C22 C25 C30
CX2
UX2
U5
PG6
JP8 C23
JP4
CX1
C53
UX1 C31
PG7
R39
C26 C32
CX3 CX7 CX9
R40
R45
R41
CX4 CX8 CX10
C33
R42
CX6 CX11
CX5
R62 C34
C35
C36
C37
RESET
U3
RP2 RP3 RP4 JP3 1
S1
C59
C56
2
C53 C55
+5 V
C51 C50
R24
GND
R67
R21 JP6
JP7
+3.3 V
C39
C28
C19
C14
C13
R3
C1 R1
C3
R13
R14
RESET RCM3400 when changing mode:
R4 U1
JP1 JP2
R5
GND
Short out pins 1–32 on header J2,
R3
C4
+5 V
Press RESET button (if using Prototyping Board),
R8
J3
Cycle power off/on
S2
after removing or attaching programming cable.
GND AIN0 AIN1 AIN2 AIN3 AIN4 AIN5 AIN6 THERM GND CNVRT VREF
PROG
PROG
BT1
Battery
C46
Y1
R54
U10
C54
C41 C42
C55
R59
C52
HOT C56
C49
C51
C59
C50
U7
U6
LCD1JB
OR
DS1 DS2
R47 R57
PD6 PD7
+3.3 V
2 2
GND
S3
1 1
PD4
PD5
+5 V
connector on the pro-
connector is attached,
L1
D2
D1
C61
DCIN
GND
+3.3 V
U12
+5 V +5 V
U13 C60
R64
GND GND
LCD1JA
LCD1JC GND
OR
+3.3 V
GND
+5 V
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