32 Jackrabbit (BL1800)3.6 Programming Cable

The programming cable is used to connect the Jackrabbit’s programming port to a PC serial

COM port. The programming cable converts the RS-232 voltage levels used by the PC

serial port to the TTL voltage levels used by the Rabbit 2000.

When the PROG connector on the programming cable is connected to the Jackrabbit’s

programming header, programs can be downloaded and debugged over the serial interface.

The DIAG connector of the programming cable may be used on the Jackrabbit’s program-

ming header with the Jackrabbit operating in the Run Mode. This allows the programming

port to be used as a regular serial port.

3.6.1 Changing Between Program Mode and Run Mode

The Jackrabbit is automatically in Program Mode when the PROG connector on the pro-

gramming cable is attached to the Jackrabbit, and is automatically in Run Mode when no

programming cable is attached. When the Rabbit 2000 is reset, the operating mode is

determined 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 2000 in the

Program Mode. When the programming cable’s PROG connector is not attached, the

SMODE pins are pulled low, causing the Rabbit 2000 to operate in the Run Mode.

Figure 13. Jackrabbit Program Mode and Run Mode Setup

A program “runs” in either mode, but can only be downloaded and debugged when the

Jackrabbit is in the Program Mode.

Refer to the Rabbit 2000 Microprocessor User’s Manual for more information on the pro-

gramming port and the programming cable.

JP1

Program Mode

JP1

Run Mode

Power
RESET Jackrabbit board when changing mode:
Short out RESET pads below header J5, OR
Press RESET button (if using Prototyping Board), OR
Cycle power off/onafter removing or attaching programming cable.

Reset pads Reset pads

U4 U4VINGNDGNDRESETJACKRABBITZ-World, Inc.
GND
PA0
PA2
PA4
PA6
GND
PB0
PB2
PB4
PB6
WDO
GND
PE6
PE4
PE2
PE0
HV0
HV2
K
GND
VCC
PA1
PA3
PA5
PA7
GND
PB1
PB3
PB5
PB7
PCLK
PE7
PE5
PE3
PE1
GND
HV1
HV3
+RAW
VCC
GND
RXC
TXC
PC1
PC3
PC5
PC7
AGND
DA1
PD1
PD3
PD5
PD7
GND
485+
VCC
SM1
STAT
VBAT
GND
VCC
RXB
TXB
PC0
PC2
PC4
PC6
AD0
DA0
PD0
PD2
PD4
PD6
GND
485
VCC
SM0
IOBEN
GND
/RST
J5U6U5U3J4U1J1J2J3Y3Rabbit 2000SRAMRS-232RS-485VINGNDGNDRESETJACKRABBITZ-World, Inc.
GND
PA0
PA2
PA4
PA6
GND
PB0
PB2
PB4
PB6
WDO
GND
PE6
PE4
PE2
PE0
HV0
HV2
K
GND
VCC
PA1
PA3
PA5
PA7
GND
PB1
PB3
PB5
PB7
PCLK
PE7
PE5
PE3
PE1
GND
HV1
HV3
+RAW
VCC
GND
RXC
TXC
PC1
PC3
PC5
PC7
AGND
DA1
PD1
PD3
PD5
PD7
GND
485+
VCC
SM1
STAT
VBAT
GND
VCC
RXB
TXB
PC0
PC2
PC4
PC6
AD0
DA0
PD0
PD2
PD4
PD6
GND
485
VCC
SM0
IOBEN
GND
/RST
J5U6U5U3J4U1J1J2J3Y3Rabbit 2000SRAMRS-232RS-485Colored sidelines up withpin 1ToPC COM portPROGDIAGProgrammingconnector