SiS5591
SiS5591 is PCI A.G.P. & CPU Memory Controller manufactured by Silicon Integrated System.
OVERVIEW
Si S5591/5592 Si S5595
PCI A.G.P. & CPU Memory Controller PCI SYSTEM I/O
The Si S5591/5592 Si S5595 glueless P5 A.G.P. chipset provides a high performance/cost index Desktop/Mobile solution for the Intel Pentium P54C/P55C, AMD K5/K6, and Cyrix M1/M2 A.G.P. system.
The Si S5591/Si S5592 A.G.P./PCI controller integrated the Host-to-PCI bridge, the L2 cache controller, the DRAM controller, the Accelerated Graphics Port interface, and the PCI IDE controller. The L2 cache controller can support up to 1 M P.B. SRAM, and the DRAM controller can support EDO/FP/SDRAM memory up to 768 MB with optional ECC or parity check function. The A.G.P. 1.0 pliance interface supports both 1X, and 2X speed mode with sideband address capability. The built-in fast PCI IDE controller supports the ATA PIO/DMA, and the Ultra DMA/33 functionality.
Si S5591 and Si S5592 have some pin-out switching to facilitate the main-board layout. Si S5591 pin assignment is based on the ATX form factor, and Si S5592 pin assignment is based on the NLX form factor. Beside the pin-out switching, Si S5591 and Si S5592 is totally the same on the internal logic circuit.
The Si S5595 PCI system I/O integrates the PCI-to-ISA bridge with the DDMA, and Serial IRQ capability, the ACPI/Legacy PMU, the Data Acquisition Interface, the Universal Serial Bus host/hub interface, and the ISA bus interface which contains the ISA bus controller, the DMA controllers, the interrupt controllers, and the Timers. It also integrates the Keyboard controller, and the Real Time Clock (RTC). The built-in USB controller, which is fully pliant to OHCI (Open Host Controller Interface), provides two USB ports capable of running full/low speed USB devices. The Data Acquisition Interface offers the ability of monitoring and reporting the environmental condition of the PC. It could monitor 4 positive analogue voltage inputs, 2 Fan speed inputs, and one temperature input.
The following page will show the system block diagram.
Preliminary V1.0...
