參數(shù)資料
型號: RCM3200
廠商: Electronic Theatre Controls, Inc.
英文描述: C-Programmable Module with Ethernet
中文描述: C編程與以太網(wǎng)模塊
文件頁數(shù): 17/96頁
文件大?。?/td> 2066K
代理商: RCM3200
User’s Manual
13
2.2.3 Programming Port
Serial Port A has special features that allow it to cold-boot the system after reset. Serial
Port A is also the port that is used for software development under Dynamic C.
The RCM3200 has a 10-pin program header labeled J3. The Rabbit 3000 startup-mode
pins (SMODE0, SMODE1) are presented to the programming port so that an externally
connected device can force the RCM3200 to start up in an external bootstrap mode. The
Rabbit 3000 Microprocessor User’s Manual
provides more information related to the
bootstrap mode.
The programming port is used to start the RCM3200 in a mode where it 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 in-circuit.
The RCM3200 can be reset from the programming port via the /RESET_IN line.
The Rabbit 3000 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.
The clock line for Serial Port A is presented to the programming port, which makes syn-
chronous serial communication possible.
Programming may also be initiated through the motherboard to which the RCM3200
series module is plugged in to since the Serial Port A (PC6 and PC7), SMODE0, SMODE1,
and /RESET_IN are available on headers J1 and J2 (see Table 1).
2.2.3.1 Alternate Uses of the Programming Port
The programming port may also be used as an application port with the
DIAG
connector
on the programming cable.
All three clocked Serial Port A signals are available as
a synchronous serial port
an asynchronous serial port, with the clock line usable as a general CMOS input
two general CMOS inputs and one general CMOS output.
Two startup mode pins, SMODE0 and SMODE1, are available as general CMOS inputs
after they are read during the initial boot-up. The logic state of these two pins is very
important in determining the startup procedure after a reset.
/RES_IN is an external input used to reset the Rabbit 3000 microprocessor.
The status pin may also be used as a general CMOS output.
See Appendix E, “Programming Cable,” for more information.
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