msm7712 Oki Semiconductor, msm7712 Datasheet - Page 17

• Manufacturer Part Number: msm7712
• Description: Wireless Lan Baseband Controller
• Manufacturer: Oki Semiconductor

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E
E
1. RCK at 16 MHz.
Radio Control Timing
The following diagram shows a typical receive-transmit-receive sequence. RXPHE is asserted for receive.
When CSENSE is detected(1) a packet is received. When CSENSE is inactive a transmit is requested by
TXPHYE asserted. Delays between the receive control pins RXCx and transmit control pins TXCx are
programmable to suit different radio designs. The packet is transmitted and when no further information
is to be transmitted TXPHYE is deasserted. The modem holds CSENSE (2) until the ramp down is com-
plete when the transmit control pins are deasserted and receive control pins are asserted. Note: RXPHYE,
TXPHYE and CSENSE are internal signals.
Radio Control Timing
t
t
t
t
t
t
t
t
t
t
t
2
2
SKL
SKH
SU
S(DO-SK)
H(SK-DO)
ONRT1
ONTIT2
ONT1IF
OFFCST2
OFFT2T1
OFFT1R
PROM Interface
PROM Timing
Parameter
Parameter
EEDO
EECS
EESK
EEDI
Clock low time
Clock high time
CS,DI setup time to rising clock
Setup time of read data to rising clock
Hold time of read data to rising clock
RXC1 deasserted to TXC1 asserted
TXC1 asserted to TXC2 asserted
TXC2 asserted to IF data output
CSENSE deasserted to TXC2 deasserted
TXC2 deasserted to TXC1 deasserted
TXC1 deasserted to RXC1 asserted
[1]
[1]
t
SKI
t
Description
SU
t
Description
S(DO-SK)
Figure 7. E
2
PROM Timing
t
H(SK-DO)
t
SKH
Min.
10
0
-
-
-
Min.
0
0
0
0
0
0
Oki Semiconductor
2000-125
2000
2000
Typ.
-
-
3000
2000
2000
4000
1000
Typ.
5
Max.
15000
Max.
7000
7000
7000
7000
-
-
-
-
-
20
MSM7712
ns
Symbol
Symbol
ns
17