PPC7A Product Manual
Functional Description
8-30
1
st
Edition
Motherboard Type Register (Port 0x0866)
This register provides information on the type of motherboard and SDRAM ECC operation. The bits
used in this register are compatible with the other members of the current Radstone PPC product range.
MSB = D0, LSB = D7
D0: HW_ECC
ENABLE
0 = Non-ECC
1 = ECC enabled
D1:
PLL2 (see table below)
D2: ECC_TYPE
0 = Reserved
1 = ECC
D3: ECC
0 = ECC not fitted
1 = ECC fitted
D4:
PLL1 (see table below)
D5:
PLL0 (see table below)
P
LL
2 P
LL
1 P
LL
0 B
US
S
PEED
(M
HZ
)
1
1
1
Reserved
1
1
0
Reserved
1
0
1
Reserved
1
0
0
133
0
1
1
Reserved
0
1
0
100
0
0
1
66
0
0
0
Reserved
D6 and D7:
Hardware ID2 and ID1 respectively. Used with Hardware ID0 (bit 0 of Equipment
Present Register 1) to define the hardware type as follows:
I
D
2 T
O
I
D
0
H
ARDWARE
T
YPE
111
PPC1/PPC3
110
PPC2
101
PPC1A
100
PPC2A
011
PPC4
010
PPC4A
000
Use Extended ID
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