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AMD SP5100 Databook
44409 Rev. 1.70 October 10
56
Functional Description
8.3.2 LPC Module Block Diagram
Configuration
Register Cntrl
32-bit DMA Buffer
LDRQ Handler
Master Data Buffer
PCI Decode State
Machine
Protocol State
Machine
Misc Module
PCI Interface
LPC Interface
ISA Interface
internal
Figure 8-3: Block Diagram of LPC Module
8.4
Integrated Micro-Controller (IMC)
Note:
Whether the IMC interface is enabled or not, the IMC GPIO pins can be used as general purpose
GPIOs without IMC support. If not used, pins on this interface should be terminated in the manner
described in the
SP5100 Schematic Review Checklist
.
8.5
Real Time Clock
The Real Time Clock (RTC) is used for updating a computer’s time. In addition to that, it also generates
interrupts for periodic events and pre-set alarm. The SP5100’s RTC includes a 256-byte CMOS RAM,
which is used to store the configuration of a computer, such as the number and type of floppy drive,
graphics adapter, base memory, checksum value, etc. The RTC supports leap year date adjustment in
hardware.