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参数资料
| 型号： | SLC88B17QFP |
| 厂商： | STANDARD MICROSYSTEMS CORP |
| 元件分类： | 总线控制器 |
| 英文描述： | ISA BUS CONTROLLER, PQFP160 |
| 封装： | QFP-160 |
| 文件页数： | 45/54页 |
| 文件大小： | 333K |
| 代理商： | SLC88B17QFP |
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SMSC DS – SLC88B17
Page 5
Rev. 09/28/99
FUNCTIONAL BLOCK OVERVIEW
The SLC88B17 is a high integration chip. Below is a brief overview of the major functional blocks in the SLC88B17.
Figure 3 shows the Block Diagram of the SLC88B17.
PCI-to-ISA Bridge
The SLC88B17 is compatible with the PCI 2.1 specification, as well as the ISA bus specification. The SLC88B17
operates as a PCI master for ISA masters. The SLC88B17 operates as a slave for its internal registers and for cycles
that are passed to the ISA bus. The SLC88B17 positively decodes all internal registers.
The SLC88B17 can be configured for a full ISA bus. Like standard ISA Bridge chips, the SLC88B17 also provides
byte-swap logic, I/O recovery support, wait-state generation, and SYSCLK generation. The SLC88B17 is designed to
directly drive up to 5 ISA slots without external data or address buffering. The SLC88B17 is configured as a
subtractive decode PCI to ISA Bridge but can also be configured to positively decode a fixed memory range, from
0FFF0000h to 0FFFFFFFh. When configured for positive decoding, the SLC88B17 does not subtractive decode.
ISA DMA and Interrupt Logic
The DMA logic supports the PC/PCI protocol and allows PCI-based peripherals to initiate DMA cycle by encoding
requests and grants through signals nISAREQ and nISAGNT.
The SLC88B17 interrupt logic transmits ISA interrupt requests through the SERIRQ signal line to the interrupt
controllers for processing. The interrupt controllers normally reside on the south bridge chip.
FIGURE 3 - CHIP BLOCK DIAGRAM
PCI
Bus
Interface
ISA
Bus
Interface
Interrupt
Logic
DMA
Logic
PCICLK
AD[31:0]
C/nBE[3:0]
nFRAME
nIRDY
nSTOP
nDEVSEL
IDSEL
nSERR
SD[15-0]
SA[19-0]
LA[23-17]
nIOCS16
nMEMCS16
nMEMW
nIOW
nIOR
AEN
BALE
IOCHRDY
nIOCHK
SYSCLK
nSMEMR
nSMEMW
nZEROWS
nSBHE
IRQ12/M
RQ[15,14,11-9,7-3]
SERIRQ
DREQ [7-5, 3-0]
nDACK[7-5, 3-0]
TC
nREFRESH
nISAGNT
nISAREQ
nMASTER
nMEMR
RSTDRV
nTRDY
Reset &
Select
Logic
NOGO
DSPWRGD
PAR
nPCIRST
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相关代理商/技术参数 |
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| SLC8B1300 | 制造商:ITT 制造商全称:ITT Industries 功能描述:Snap/Clip-Lock Environmentally Sealed - Circular |
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