msm7730 Oki Semiconductor, msm7730 Datasheet - Page 4

• Manufacturer Part Number: msm7730
• Description: Wireless Lan Baseband Controller
• Manufacturer: 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:
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.
2
• Processor
• Shared RAM
• EEPROM
• Radio
• MODEM
• PHY
• PCMCIA
MSM7730
Oki Semiconductor
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––
Radio
Figure 1. MSM7730 Block Diagram and Typical WLAN Card
Combined 1 & 2
Radio Interface
Mbps Modem
PHY Layer,
Processor
(optional)
RAM
Processor
Processor
Interface
MAC Protocol
Controller
MSM7730
(32k~128kx16)
Shared RAM
Controller
Memory
PCMCIA
Interface
EEPROM
EEPROM
Interface
Host
Computer