Bruker AQS, Техническое руководство

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&" #"! !$! #
(98/12/10)
Address
Byte Format
3 2 1 0
Read/Write Destination
1F0A0014
MODE0 W - - - x b
1F0A0014
MODE0 R - - - x b
1F0A0018
MODE1 W - - - x b
1F0A0018
MODE1 R - - - x b
1F0A001C
MODE2 W - - - x b
1F0A001C
MODE2 R - - - x b
4. 2. 9. Real Time Clock and NVRAM
Notes
The MK48T02 of SGS–Thomson is installed to implement these two
functions by one device.
It is a 2K–Byte–Static–RAM with its eight upmost cells being reserved
as hold register for the real time clock information.
The lower half of the 2 kbyte is normally protected and can only be writ-
ten by means of the special PAL device ”CU09Nx01 ” of the service
staff. So far, this range contains only the ”ethernet physical address”.
Besides the timing registers, the upper half of NVRAM contains all the
other boot parameters read with ”printenv” and changed with ”setenv” in
the monitor program.
Device Codes
Address Destination Read/Write
Byte Format
3 2 1 0
1F00000x
to
1F006FFx
NVRAM range, lower half R x x x b
1F00700x
to
1F007F7x
NVRAM range, upper half R/W x x x b
1F007F8x
Control Register R/W x x x b
1F007F9x
Seconds R/W x x x b
1F007FAx
Minutes R/W x x x b
1F007FBx
Hour R/W x x x b
1F007FCx
Day R/W x x x b
1F007FDx
Date R/W x x x b