参数资料
型号: SIS600
厂商: SILICON INTEGRATED SYSTEMS CORP
元件分类: 外设及接口
英文描述: MULTIFUNCTION PERIPHERAL, PBGA487
封装: BGA-487
文件页数: 81/144页
文件大小: 1592K
代理商: SIS600
SiS600 Pentium II PCI /A.G.P. Chipset
Preliminary V1.0 Jan. 25, 1999
38
Silicon Integrated Systems Corporation
Fast reset emulation.
Fast A20M# emulation.
CPU involves PCI master arbitration.
Supports CPU idle timer, PCI grant timer and master latency timer.
Supports configuration access format type I, II.
Using configuration mechanism #1.
When CPU issues a line read cycle, converts the toggle mode address to the linear mode address
automatically, then forwards to the PCI side.
The PCI Master Controller forwards the CPU cycles not targeting the local memory to the PCI bus. In the case of
a 64-bit CPU request or a misaligned 32-bit CPU request the PMR assumes the read assembly and write
disassembly control. A 4 level local posted write buffer is implemented to improve the CPU to PCI memory write
performance. For PCI memory write cycles, the CPU data are pushed into the buffer as soon as FIFO is empty
and then forwarded to PCI bus. If a line read cycle forwarded to the PCI, PCI master controller will convert the
toggle mode address to the linear mode address automatically, then forward to the PCI side. If the consecutive
written data is in DW incremental sequence, they will be transferred to the PCI bus in a burst manner.
The PMR provides a mechanism for converting standard I/O cycles on the CPU bus to Configuration cycles on
the PCI bus.
PCI FORMAT
CONVERTER
CFG ADDRESS
CONVERTER
MUX
ADDR/CMD/ATTR
PING-PONG BUFFER
4level, 3DW
BURST ADDR
GEN &
COMPARE
CFGCYC
NEXT_HA
FADA
MUX
PMR_CMD
0CF8h
REG
PMR_HA
PMR_HD
HGDW
DATA/BEN
PING-PONG BUFFER
4level, 3DW
MUX
HITPIO
Configuration
register
ADA
ADD
MUX
ADOE
AD
ADO
MDATA+PS
L
ADI
MUX
0FFFFFFFFh
Master_abt
PTHFF
4level, 12QW
POINTER
CONTROL
P5HD
RESET &
A20M#
CONTROL
PWRGD
RESET
INIT
PMR BLOCK DIAGRAM
A20M#
HA,
HD,
CMD
PMR_HBE
EXT_AD
PMR_HBE
Figure 5.3-2 Block Diagram for PMR
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