Emerson 752I Manual Do Utilizador
Monitor:
Basic Operation
15-5
Power-Up Timing
Upon power-up, the Katana®752i initially retries cPCI cycles for a specific period of time
(see “cPCI/PCI Stop Retries, Memory Read Access Only” monitor state in the tables below).
After that time, it stops retrying cycles on the cPCI bus.
(see “cPCI/PCI Stop Retries, Memory Read Access Only” monitor state in the tables below).
After that time, it stops retrying cycles on the cPCI bus.
Caution:
Any read access between the “cPCI/PCI Stop Retries, Memory Read Access Only” and “Final
Memory Initialization” monitor states (see
Memory Initialization” monitor states (see
and
) may result in an ECC
exception on the Katana®752i.
The following tables show the monitor power-up timing for booting from both socked and
soldered flash memory.
soldered flash memory.
Note:
The resolution for the measured times in
and
is ±10 milliseconds. The measurements
were performed from a front panel reset. The Katana®752i used in these tests had 512 megabytes of RAM
with ECC and Clear Memory On. CompactPCI mode was also enabled.
with ECC and Clear Memory On. CompactPCI mode was also enabled.
Table 15-1:
Power-Up Timing for Booting from Soldered Flash
Table 15-2:
Power-Up Timing for Booting from Socketed Flash
Time
(sec):
(sec):
Debug LED
State (bits):
State (bits):
Monitor State:
0
n/a
System Reset
0.157
0001
CPU and MV64460 Setup
0.200
0010
Early I
2
C Setup, cPCI mode only
0.216
0011
Early Memory Initialization, ECC Off
0.221
0100
cPCI/PCI Stop Retries, Memory Read Access Only
0.490
0101
Serial Port Initialized
0.623
0110
Display CPU, Board and Bus Speed Information
2.563
0111
Final Memory Initialization, ECC and Clear
2.857
1000
Monitor code relocated to top of memory
4.627
1001
PCI/cPCI Final Setup. Enumeration. Memory Read/Write Access
available through PCI/cPCI
available through PCI/cPCI
4.915
0000
Monitor Prompt
Time
(sec):
(sec):
Debug LED
State (bits):
State (bits):
Monitor State:
0
n/a
System Reset
0.159
0001
CPU and MV64460 Setup
0.250
0010
Early I
2
C Setup, cPCI mode only
0.282
0011
Early Memory Initialization, ECC Off
0.293
0100
cPCI/PCI Stop Retries, Memory Read Access Only
0.817
0101
Serial Port Initialized
0.978
0110
Display CPU, Board and Bus Speed Information
4.864
0111
Final Memory Initialization, ECC and Clear
!