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参数资料
| 型号： | MPM22CGA800A |
| 厂商： | INTEL CORP |
| 元件分类： | 微控制器/微处理器 |
| 英文描述： | 32-BIT, 800 MHz, MICROPROCESSOR, XMA |
| 封装： | MMC-2 |
| 文件页数： | 21/68页 |
| 文件大小： | 966K |
| 代理商： | MPM22CGA800A |
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Pentium
III Processor Mobile Module MMC-2
Featuring Intel
SpeedStep Technology
22
Datasheet
243356-006
Second set of memory address lines (MAA[13:0])
Extended Data Out (EDO) DRAM
66-MHz memory bus
The clocking architecture supports the use of SDRAM. Due to tight timing requirements of the
100-MHz SDRAM clocks, the clocking mode for SDRAM memory configurations allows all host
and SDRAM clocks to be generated from the same clocking architecture on the system electronics.
For complete details about memory device support, organization, size, and addressing when using
SDRAM memory and trace length guidelines, refer to the Intel Pentium III Processor Mobile
Module System Electronics 100-MHz Layout Guidelines Revision 1.0 (OR-1780).
4.3.2
Reset Strap Options
Several strap options on the memory address bus define the behavior of the mobile module after
reset. Other straps are allowed to override the default settings. Table 14 shows the various straps
and their implementation.
4.3.3
PCI Interface
The PCI interface of the 82443BX Host Bridge is available at the MMC-2 connector. The
82443BX Host Bridge supports the PCI Clockrun protocol for PCI bus power management. In this
protocol, PCI devices assert the CLKRUN# open-drain signal when they require the use of the PCI
interface. Refer to the PCI Mobile Design Guide for complete details on the PCI Clockrun
protocol.
The 82443BX Host Bridge is responsible for arbitrating the PCI bus. The 82443BX Host Bridge
can support up to five PCI bus masters. There are five PCI Request/Grant pairs (REQ[4:0]# and
GNT[4:0]#) available on the connector.
Note:
The PCI interface on the MMC-2 connector is 3.3V only. PCI devices that are 5.0V are not
supported.
The 82443BX Host Bridge system controller is compliant with the PCI 2.1 Specification, which
improves the worst case PCI bus access latency from earlier PCI specifications. The 82443BX
Host Bridge supports only Mechanism #1 for accessing PCI configuration space. This implies that
signals AD[31:11] are available for PCI IDSEL signals. However, since the 82443BX Host Bridge
Table 14. Configuration Straps for the 82443BX Host Bridge System Controller
Signal
Function
Module Default Setting
Optional Override on
System Electronics
MAB[12]#
Host Frequency Select
Strapped high on the module for 100
MHz
None
MAB[11]#
In Order Queue Depth
No strap, maximum queue depth is set
at 8
None
MAB[10]#
Quick Start Select
Strapped high on the module for Quick
Start mode
None
MAB[9]#
AGP Disable
No strap (AGP is enabled)
Strap high to disable AGP
MAB[7]#
MM Configuration
No strap (standard MMC-2 mode)
None
MAB[6]#
Host Bus Buffer Mode
Select
Strapped high on the mobile module
for mobile PSB buffers
None
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