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Management Processor CPLD: MPC8548 PLD Register
10009109-01 ATCA-9305 User’s Manual
5-11
Register 5-20: RTM Control (0x68)
Cavium 1 C_MUL Clock Divisor Control
Use the C_MUL1 register to reduce the speed of the Cavium CN5860 processor 1 core.
Caution: Do not over-clock the Cavium frequency (bits 6:7 hard strapped).
Register 5-21: Cavium 1 C_MULL Clock Divisor Control (0x70)
Cavium 2 C_MUL Clock Divisor Control
Use the C_MUL2 register to reduce the speed of the Cavium CN5860 processor 2 core.
Caution: Do not over-clock the Cavium frequency (bits 6:7 hard strapped).
Bits: Function: Description:
70
60
50
4 RTMP RTM is Present
3 RTMID3 RTM Identification bits 3:0
0000 = Test RTM (factory only)
1000 = 20GbE I/O RTM
1100 = 18GbE and 2x10GbE I/O RTM
1010 = Storage RTM
2RTMID2
1RTMID1
0RTMID0
Bits: Function: Description:
7 CAVF Cavium Frequency resistor set bit (read-only)
00 600
01 750
10 800
11 reserved
6
5CMULOE C_MUL Output Enable
4 P1CMUL4 These bits drive directly to the Cavium 1. The core clock speed
is the number multiplied by 50 MHz. For example, the 800 MHz
core is set to 16(0x10).
3P1CMUL3
2P1CMUL2
1P1CMUL1
0P1CMUL0
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