Kontron AM4024e - Manual (Page 42)

D R A F T — F O R I N
T E R N A L U S E O N L Y
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User Guide
AM4024(E)
3.2 System Wr ite Protection
The AM4024(E) provides write protection for non-volatile memories via the DIP switch SW2, switch 3,
the uEFI Shell and a backplane pin. If one of these sources is enabled, the system is write protected.
Please contact Kontron for further information before using these functions.
3.3 AM4024(E)-Specif ic Registers
3.3.1 Write Protection Register (WPROT)
The Write Protection Register holds the write protect signals for non-volatile devices.
Table 24: AM4024(E)-Specific Registers
ADDRESS DEVICE
0x284 Write Protection Register (WPROT)
0x285 Reset Status Register (RSTAT)
0x288 Board ID High-Byte Register (BIDH)
0x28A Geographic Addressing Register (GEOAD)
0x28C Watchdog Timer Control Register (WTIM)
0x28D Board ID Low-Byte Register (BIDL)
0x290 LED Configuration Register (LCFG)
0x291 LED Control Register (LCTRL)
0x292 General Purpose Output Register (GPOUT)
Table 25: Write Protection Register (WPROT)
ADDRESS 0x284
BIT 7 6 5 4 3 2 1 0
NAME SWP Reserved SFWP DSWP BSWP SSWP
ACCESS R R R/W R R R/W
RESET 0 000 0 0 0 0
BITFIELD DESCRIPTION
7 SWP System write protection status:
0 = Onboard non-volatile memory devices not write protected
1 = Onboard non-volatile memory devices write protected
3 SFWP Reserved
2 DSWP This bit reflects the state of the system write protection via DIP switch SW2, switch 3:
0 = System not write protected via DIP switch
1 = System write protected
1 BSWP This bit reflects the state of the system write protection via backplane (SYS_WP#):
0 = System not write protected via backplane
1 = System write protected
0 SSWP This bit reflects the state of the system write protection via software:
0 = System devices not write protected via software
1 = System write protected
If this bit is programmed once, it cannot be reprogrammed.