Rabbit Semiconductor 101-0505 Datasheet

3.3.3 Programming Port

The RabbitCore module on the OP6800 has a 10-pin programming header. The programming port uses the Rabbit 2000’s Serial Port A for communication, and is used for the following operations.

•

Programming/debugging

•

Cloning

•

Remote program download/debug over an Ethernet connection via the RabbitLink

EG2100

The programming port is used to start the OP6800 in a mode where the OP6800 will download a program from the port and then execute the program. The programming port transmits information to and from a PC while a program is being debugged.

The Rabbit 2000 startup-mode pins (SMODE0, SMODE1) are presented to the programming port so that an externally connected device can force the OP6800 to start up in an external bootstrap mode. The OP6800 can be reset from the programming port via the

/EXT_RSTIN

line.

The Rabbit 2000 status pin is also presented to the programming port. The status pin is an output that can be used to send a general digital signal.

NOTE: Refer to the Rabbit 2000 Microprocessor User’s Manual for more information related to the bootstrap mode.

User’s Manual 21