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MSM7712 Datasheet(PDF) 5 Page - OKI electronic componets

Part # MSM7712
Description  Wireless LAN Baseband Controller
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Manufacturer  OKI [OKI electronic componets]
Direct Link  http://www.oki.com
Logo OKI - OKI electronic componets

MSM7712 Datasheet(HTML) 5 Page - OKI electronic componets

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–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– s MSM7712 s
5
Oki Semiconductor
INTERFACE DESCRIPTIONS
Processor Interface
Most applications (e.g. PC add-in cards) require a local processor to handle the higher layers of the IEEE
802.11 protocol. The host computer typically runs a NDIS or 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 MSM7712GS-K performs the lower layers of MAC and the PHY under
control of the local processor.
The MSM7712 can be configured to operate with 80C80 (V30) and 80C186 processor types. The processor
configuration P_CONF is determined from the level of the PD lines during the MSM7712 reset. Designers
should consult the appropriate processor datasheets and this section to understand how the processor
interface works.
No external circuitry is required between the processor and the MSM7712. Table 1 specifies the connec-
tion of various processor signals to the MSM7712.
The output signal PREADYN, PINTN, PRESETN are active low or high to suit the different processor
requirements
P_CONF option 1 provides an interface to the 80C86 or V30 processor. The processor must be set to max-
imum mode and a device with a 50% mark/space clock ratio at 16MHz and must be used (assuming a
CSCK of 32 MHz).
P_CONF option 2 provides an interface to the 80C186 processor family with a 32 Mhz oscillator input.
All other values of P_CONF are reserved and should not be used.
Processor Options
MSM7712GS-K
80C86, V30 (Max mode)
80C186
P_CONF
1
2
PA[17:16]
A[17:16]
AD[17:16]
PD[15:0]
AD[15:0]
AD[15:0]
PST2
BS2
S2
PST1
BS1
S1
PST0
BS0
S0
PREAD
-
-
PUBE
UBE
BHE
PCLKOUT
-
CLKOUT
PREADYN
READY
SRDY
PINTN
INT
INT0
PRESETN
RESET
RES
PCLK
CLK
X1


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