Albatron Technology ARM11/Cortex-A8 user manual Or use the Telnet unlock command

bdiGDB for GNU Debugger, BDI2000 (ARM11/Cortex-A8) User Manual 37

Note:

Some Intel flash chips (e.g. 28F800C3, 28F160C3, 28F320C3) power-up with all blocks in locked state. In order to erase/program those flash chips, use the init list to unlock the appropriate blocks:

WM16	0xFFF00000	0x0060	unlock block 0
WM16	0xFFF00000	0x00D0
WM16	0xFFF10000	0x0060	unlock block 1
WM16	0xFFF10000	0x00D0
	....
WM16	0xFFF00000	0xFFFF	select read mode

or use the Telnet "unlock" command:

UNLOCK [<addr> [<delay>]]
addr	This is the address of the sector (block) to unlock
delay	A delay time in milliseconds the BDI waits after sending the unlock com-
	mand to the flash. For example, clearing all lock-bits of an Intel J3 Strata
	flash takes up to 0.7 seconds.

If "unlock" is used without any parameter, all sectors in the erase list with the UNLOCK option are processed.

To clear all lock-bits of an Intel J3 Strata flash use for example:

BDI> unlock 0xFF000000 1000

To erase or unlock multiple, continuos flash sectors (blocks) of the same size, the following Telnet commands can be used:

ERASE <addr> <step> <count>

UNLOCK <addr> <step> <count>

addr	This is the address of the first sector to erase or unlock.
step	This value is added to the last used address in order to get to the next sec-
	tor. In other words, this is the size of one sector in bytes.
count	The number of sectors to erase or unlock.

The following example unlocks all 256 sectors of an Intel Strata flash ( 28F256K3) that is mapped to 0x00000000. In case there are two flash chips to get a 32bit system, double the "step" parameter.

BDI> unlock 0x00000000 0x20000 256

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