E3500 / E4500 / E5500 / E6500

Clock Board

Backpanel and Connectors

1. Clock 501-4946 was shipped in the E3500 - E6500.
2. Clock 501-4946 was not shipped in the E3000 - E6000.
3. Clock 501-4946 is supported in the E3000 - E6000 and E3500 - E6500.

Notes

1. The minimum OS for the Ex000 is Solaris 2.5.1.
2. The minimum OS for the Ex500 is 2.5.1 HW: 11/97 or 2.6 HW: 3/98.
3. The Clock Board is not a hot swap component.
4. Clock 501-4946 supports 167, 250, 336, and 400MHz modules.
5. Clock 501-4946 supports 1:2, 1:3, and 1:4 clock ratios.
6. Use the POR button to perform a Power On Reset.
7. Use the XIR button to perform an Externally Initiated Reset.
8. After an XIR, memory is cleared and some CPU state is preserved.
9. An XIR does not override the NVRAM auto-boot? parameter.
10. Use the OBP .xir-state-all command to display the XIR information.

NVRAM Notes

1. The Clock Board, I/O Board, and I/O Graphics Board NVRAMs are automatically synchronized when the Clock Board NVRAM contents matches at least one I/O Board or I/O Graphics Board NVRAM.
2. Use the following OBP command to manually synchronize a new or replacement I/O Board to an existing Clock Board:
   

   ok copy-clock-tod-to-io-boards

3. Use the following OBP command to manually synchronize a new or replacement Clock Board to an existing I/O Board:
   

   ok (ioboard# in hex) copy-io-board-tod-to-clock-tod

Remote Console Notes

1. The remote console monitors input to ttya.
2. The secure position of the keyswitch disables the remote console.
3. A Power On Reset (POR), Externally Initiated Reset (XIR), or Power Cycle can be performed through the remote console.
4. Enter remote console characters with a 0.5 to 5 second delay.
5. Remote console commands are:
   

   Power Cycle

   CR CR ~ CNTL SHFT P

   POR

   CR CR ~ CNTL SHFT R

   XIR

   CR CR ~ CNTL SHFT X