Nvram/Tod; Reset Types - Sun Microsystems Sun Blade 100 Service Manual

+12V
SC_INT_L
FIGURE C-4
C.2.9

NVRAM/TOD

The system requires at least 8 Kbytes of non-volatile static RAM to store the
variables for the operating system and a real time clock to do timekeeping. This
device has both functions integrated plus the self-contained battery. It also has a
programmable alarm interrupt output which can be used by the software to enable
auto-shutdown (auto suspend/resume) as a power management choice.
C.3

Reset Types

The CPU has several types of resets. The resets affect different levels of the system
devices and the processor. As an example, a Power-on Reset (POR) will reset all
devices on the motherboard as well as any PCI card that is plugged in. A soft reset is
under software control and is used to reset particular registers that reside in the
devices on the motherboard.
1 2
3 4
+5V
5 6
8
7
9 10
Smart Card Interface Header
I2C_CLK_L
I2C_DATA_L
Appendix C Functional Description C-9