Motorola ATCA-717 - Manual (Page 142)

Maps and Registers FPGA Registers
142 PENT/ATCA−717
Bit Access Default Description
4 Select status of default and backup boot
flash write protection
0: Write−protection determined by
on−board switches
1: Write−protection determined by this
register 0
2
r
6:5 Indicates flash that is booted from
00
2
: Default boot flash
01
2
: Backup boot flash
00
2
r
7 Crisis recovery (indicates status of crisis
recovery switch)
0: Crisis recovery
1: Normal operation 1
2
r
LED Control Register
This register, which is accessible via the index address 0x03, allows to control the bicolor
face plate HDD LED. This LED can be operated in parallel/serial ATA status indication
mode and user mode. Toggling between both modes is possible via this register.
a
In parallel/serial ATA status indication mode the LED shines GREEN and indicates the
combined activitiy of all serial and parallel ATA interfaces. In user mode, the LED can be
controlled to be red, green and OFF.
aaa
Table 26: LED Control Register
Bit Description Default Access
1..0 Controls LED in user mode
00
2
: OFF
01
2
: Red
10
2
: Green
11
2
: Reserved
01
2
r/w
2 Toggles between user mode and parallel/serial ATA
status indication mode
0: User mode
1: Parallel/serial ATA status indication mode 0
2
r/w
3 General purpose output on connector P30/pin A3
0: O/P is low
1: O/P is open 1
2
r/w
6 Serial COM interface swapping
0
2
: No swapping
1
2
: COM 1 is swapped with COM3, and COM 2 is
swapped with COM 4
1
2
r
7..5 Reserved 000
2
r