Block Diagram; Pci1250 Block Diagram - Acer 390 Series Service Manual

2.1.2

Block Diagram

A simplified block diagram of the PCI1250 is provided in following figure. The PCI interface
includes all address/data and control signals for PCI protocol. The interrupt interface includes
terminals for parallel PCI, parallel ISA, and serialized PCI & ISA signaling. The ring indicate
terminal is included in the interrupt interface, since it's function is to perform system wake-up on
incoming PC Card modem rings. Miscellaneous system interface terminals include GPIO signals,
PC/PCI DMA support signals, and socket activity LED signals.
Figure 2-1

PCI1250 Block Diagram

2-4 Service Guide