Albatron Technology ARM11/Cortex-A8 user manual Part Target, Cputype ARM1136, None, Pushpull

bdiGDB for GNU Debugger, BDI2000 (ARM11/Cortex-A8) User Manual 27

3.2.2 Part [TARGET]

The part [TARGET] defines some target specific values.

CPUTYPE type	This value gives the BDI information about the connected CPU.
	type	The CPU type from the following list:
		ARM1136, CORTEX-A8, OMAP3430
	Example:	CPUTYPE ARM1136

CLOCK main [init] [SLOW]With this value(s) you can select the JTAG clock rate the BDI2000 uses when communication with the target CPU. The "main" entry is used after processing the initialization list. The "init" value is used after target reset until the initialization list is processed. If there is no "init" value defined, the "main" value is used all the times.

Adaptive clocking is only supported with BDI2000 Rev.B/C and needs a special target connector cable. Add also SLOW if the CPU clock frequency may fall below 6 MHz during adaptive clocking.

main,init:	0 = Adaptive
	1	= 16 MHz	6	= 200 kHz
	2	= 8 MHz	7	= 100 kHz
	3	= 4 MHz	8	= 50 kHz
	4	= 1 MHz	9	= 20 kHz
	5	= 500 kHz	10 = 10 kHz

	Example:	CLOCK 1 ; JTAG clock is 16 MHz
RESET type [time]	Normally the BDI drives the reset line during startup. If reset type is NONE
	or SOFT, the BDI does not assert a hardware reset during startup. If reset
	type SOFT is supported depends on the connected target.
	type	NONE
		SOFT (soft reset via a debug register)
		HARD (default)
	time	The time in milliseconds the BDI assert the reset signal.
	Example:	RESET NONE ; no reset during startup
		RESET SOFT ; reset ARM core via RCSR
		RESET HARD 1000 ; assert RESET for 1 second
TRST type	Normally the BDI uses an open drain driver for the TRST signal. This is in
	accordance with the ARM recommendation. For boards where TRST is
	simply pulled low with a weak resistor, TRST will always be asserted and
	JTAG debugging is impossible. In that case, the TRST driver type can be
	changed to push-pull. Then the BDI actively drives also high level.
	type	OPENDRAIN (default)
		PUSHPULL
	Example:	TRST PUSHPULL ; Drive TRST also high

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