Field Programmable Gate Array Registers
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3-21
3
Power-On Status Register
The Power-On Status Register (POS) checks for power-on condition. You
can also read back written bits. Refer to
PWRON0 (Bit 0) and PWRON1 (Bit 1)
The BIOS uses this bit to determine if it is booting from a power-up
condition. It clears at power-on only. The BIOS may set it (write a 1) to
flag subsequent resets.
FLAG0 (Bit 2) and FLAG1 (Bit 3)
Applications use these bits to flag boot states to the BIOS on the next reset.
These bits clear at power-on and are not affected by reset. Software may
set these bits by writing 1s to them.
PBSOFT (Bit 7)
Use this bit to program the function of the reset pushbutton switch. By
default the front panel pushbutton switch causes a hard reset. Set this bit to
a 1 to cause a soft reset. Clear the bit to 0 to program the switch to cause a
hard reset. The default state is 0.
Table 3-18. Bit descriptions for hte Power-On Status register
7 (most
significant
bit)
6
5
4
3
2
1
0
PBSOFT
RES
RES
RES
FLAG1
FLAG0
PWRON1
Solution Systems Technologies Inc.
720-565-5995 | info@solusys.com | www.solusys.com
Solution Systems Technologies Inc.
720-565-5995 | info@solusys.com | www.solusys.com