msm7730 Oki Semiconductor, msm7730 Datasheet - Page 6

• Manufacturer Part Number: msm7730
• Description: Wireless Lan Baseband Controller
• Manufacturer: Oki Semiconductor

For cost-sensitive applications, local processor code may reside in shared memory. However, this may
affect processor because accesses to shared memory may contain wait states.
EEPROM Interface
EEPROM support is provided for nonvolatile storage of host interface configuration (e.g., PCMCIA CIS
table) and WLAN parameters (e.g., local IEEE address, radio parameters). The MSM7730 supports 64-,
128- or 256-byte EEPROM sizes (e.g., 93C46, 93C56, or 93C66 types).
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The local processor can be used to initialize the EEPROM and control read and writes accesses for pro-
viding card parameter storage.
Following a reset by the host processor, the EEPROM contents are automatically transferred to shared
RAM to provide the configuration information for the host interface. If the device is configured in PC-
card host mode, either 64 or 128 bytes are downloaded to shared RAM to provide the Configuration
Information Structure (CIS). If the device is configured in industry standard architecture (ISA) host
mode, a single word is loaded into an internal register to determine the ISA address space mapping and
interrupt configuration information.
Host Interface (Between Adapter Card and Computer or Laptop)
The 16-bit PCMCIA interface is fully supported by the MSM7730 with no additional logic. Access to
attribute memory (CIS configuration data) and I/O memory (host registers) are provided.
During normal operation, I/O addresses are used to access the baseband controller registers and shared
memory.
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MSM7730
Oki Semiconductor
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MSM7730
Figure 2. EEPROM Connections to MSM7730
EECS
SYNCLK/EESK
SYNDAT/EEDIO
DO
CS
SK
DI
93c46
93c58
94s66
V
V
V