PPC7A Product Manual
Functional Description
8-28
1
st
Edition
Watchdog Trig (Port 0x082C)
This is a dummy register that is written to trigger the watchdog.
MSB = D0, LSB = D7
D0 to D7: Don’t care for writes, undefined for reads
$
Note:
Data written is not used and Reads don’t trigger the watchdog.
Board Revision Register (Port 0x0854)
This register provides information on the build state of the PPC7A.
MSB = D0, LSB = D7
D0 to D2:
Number revision of hardware build state
1 = Revision 1
2 = Revision 2
3 = Revision 3
All other values are Reserved.
D3 to D7:
Letter revision of hardware build state
0x0 = Revision A
0x1 = Revision B
...
0x18 = Revision Y
0x19 = Revision YA
...
0x1F = Revision YG
Extended ID Register (Port 0x0858)
This register provides Board hardware type.
MSB = D0, LSB = D7
D0 to D7:
Board ID register
0x0E = PPC7A
- 7410/755
0x0F = PPC7A
– 745x
0x10 = PPC7FW (MPC7410 with Firewire)
All other patterns mean the board is not a PPC7A
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