- 您現(xiàn)在的位置：買賣IC網(wǎng) > PDF目錄69040 > MSM7730 (OKI ELECTRIC INDUSTRY CO LTD) 1 CHANNEL(S), 2M bps, LOCAL AREA NETWORK CONTROLLER, PQFP144 PDF資料下載
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)： | 7/20頁 |
| 文件大?。?/td> | 179K |
| 代理商： | MSM7730 |
–––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––––– s MSM7730 s
13
Oki Semiconductor
DACEN
Open-collector
For TX power control, CCA threshold and RSSI measurement, data also is clocked into a serial DAC (10/12 bit
type; e.g., MAX515/MAX539) using the SYNCLK and SYNDAT lines as described above, except that DACEN is
asserted during the programming, and the data is latched on the rising edge of DACEN.
RSSITH is an input from a threshold comparison of the analog RSSI signal from the radio with the DAC output.
It is high when the received signal exceeds the programmed threshold. This performs two purposes:
A minimum threshold of RSSI can be set before enabling the demodulator for CCA to reduce power.
Once a valid receive signal is determined (CCA invalid), the RSSI can be measured with the external
comparator/DAC and a SAR within the MSM7730. The RSSI measurement is performed for internal and
external modem options when CCA is determined.
The same DAC can be used for both TX power control, RSSI threshold and RSSI measurement.
RSSITN
Input
RCK
Output
A clock to the radio is provided on this pin. The clock is derived from SCK when RADPWR is asserted, with
fixed division ratio of one or two (selected by post-reset configuration SCK_CONF). RCK is typically 16 MHz
for the radio synthesizer reference.
RXD
Input
The function of this pin depends on the state of the MSEL[3:0] field in the PHY_CONFIG register.
Modem Interface Signal Descriptions
Pin Name
Direction
Description
IFD[5:0]
Bidirectional
If MSEL = 1 (low cost for 1-Mbps modem), IFD[5:0] are used to drive a 6-bit DAC at 32 MHz to provide the
modulated transmit IF signal at 24 MHz. They are set to the DAC mid-value during receive. It is anticipated that
a resistor ladder DAC will be used.
If MSEL = 2,3, (1/2-Mbps modem), IFD[5:0] are used to drive a 6-bit DAC at 32 MHz to provide the modulated
transmit IF signal at 24 MHz.
If MSEL = 2 (1/- Mbps modem, normal ADC) a 4-bit ADC (e.g., CA3304 type) provides digitized demodulated
data at 16 MHz as input to the baseband controller on pins IFD[3:0] during receive. The ADC outputs must only
be enabled during receive (e.g. by connecting RXC1 to the ADC output enable pin).
If MSEL = 3 (1/2-Mbps modem, delta ADC), a comparator is used to compare the value of the transmit IF DAC
output to the receive demodulated signal, performing a tracing delta ADC function. The same 6-bit DAC (but at
16 MHz) is used on IFD[5:0] as during transmit, and the comparator input is connected to the RXD pin.
RXD
Input
When MSEL = 1 (low-cost 1-Mbps modem), the RXD pin is used for baseband data input from a radio which
has a built-in analog data slicer. The MSM7730 has a clock recovery circuitry to synchronize to the incoming
data. The recovered clock is output on a diagnostic pin for test purposes.
When MSEL = 3 (1/2-Mbps modem, delta ADC), the delta comparator is input on this pin. The recovered clock
from the demodulator is output on a diagnostic pin for test purposes.
DIAG[6:0]
Output
Various signals are provided on these pins as diagnostic aids. The registers PHY_CTL[DIAG] and
DEM_CTL0[DTST] select what signals are provided on these pins.
General Signal Descriptions
Pin Name
Direction
Description
SCK
Input
The system clock to the MSM7730 is provided by this pin. The clock must always be active (i.e., when reset is
asserted). The WLAN card operates synchronously to this clock.
The MSM7730 and radio operate at SCK/2. The internal modem operates at SCK (32 MHz).
The processor operates from a division of SCK (divide by 1 to divide by 8) depending on a register (GLOB_CTL,
see Programmers Reference) in the MSM7730. This signal is output as PCK.
VSSC
Ground
These pins serve as ground for the core logic.
VSSO
Power
This pin serves as ground for the I/O pads.
VDDC
Power
This pin serves as power to the core at 3-V nominal.
VDDO
Power
This pin serves as power to I/O pads and can either be 3 V or 5 V nominal.
Radio Interface Signal Descriptions (Continued)
Pin Name
Direction
Description
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| MSM80C86A-10GS | 16-BIT, 10 MHz, MICROPROCESSOR, PQFP56 |
| MSM80C86A-2GS | 16-BIT, 8 MHz, MICROPROCESSOR, PQFP56 |
| MSM80C86ARS | 16-BIT, 5 MHz, MICROPROCESSOR, PDIP40 |
| MSM80C86AJS | 16-BIT, 5 MHz, MICROPROCESSOR, PQCC44 |
| MSM80C86A-2JS | 16-BIT, 8 MHz, MICROPROCESSOR, PQCC44 |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MSM7731 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Dual Echo Canceler & Noise Canceler with Dual Codec for Hands-Free |
| MSM7731-01 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Multifunction PCM CODEC (Voice Signal Processor) |
| MSM7731-02 | 制造商:OKI 制造商全稱:OKI electronic componets 功能描述:Dual Echo Canceler & Noise Canceler with Dual Codec for Hands-Free |
| MSM7731-02GAZ020 | 制造商:ROHM Semiconductor 功能描述: |
| MSM7731-02GAZ03A | 制造商:ROHM Semiconductor 功能描述: |
發(fā)布緊急采購，3分鐘左右您將得到回復(fù)。