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參數(shù)資料
| 型號： | MSM7730 |
| 廠商： | OKI ELECTRIC INDUSTRY CO LTD |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | 1 CHANNEL(S), 2M bps, LOCAL AREA NETWORK CONTROLLER, PQFP144 |
| 封裝： | 20 X 20 MM, 0.50 PITCH, PLASTIC, LQFP-144 |
| 文件頁數(shù)： | 15/20頁 |
| 文件大?。?/td> | 179K |
| 代理商： | MSM7730 |
s MSM7730 s –––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
2
Oki Semiconductor
BLOCK DIAGRAM
Figure 1 shows a typical wireless LAN (WLAN) card. The MSM7730 provides a direct connection to a
host interface, processor, radio, shared memory, and configuration EEPROM. The optional addition is a
processor RAM for code storage.
INTERFACE DESCRIPTIONS
The MSM7730 provides the following interfaces:
Processor
Shared RAM
EEPROM
Radio
MODEM
PHY
PCMCIA
These interfaces are explained in the following subsections.
Processor Interface
Most applications require a local processor to handle the higher layers of the IEEE 802.11 protocol. The
host computer typically runs a network device/driver interface specification (NDIS) or open datalink
interface (ODI) driver that communicates to the local processor via shared memory and interrupts. The
local processor performs the higher layers of the IEEE 802.11 MAC protocol while the MSM7730 per-
forms the lower layers of MAC and the PHY under control of the local processor.
Radio
PHY Layer,
Radio Interface
MAC Protocol
Controller
Combined 1 & 2
Mbps Modem
Processor
Interface
Memory
Controller
PCMCIA
Interface
EEPROM
Interface
EEPROM
Shared RAM
(32k~128kx16)
Processor
RAM
(optional)
MSM7730
Host
Computer
Figure 1. MSM7730 Block Diagram and Typical WLAN Card
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| MSM80C86ARS | 16-BIT, 5 MHz, MICROPROCESSOR, PDIP40 |
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