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CX20431-21 参数 Datasheet PDF下载

CX20431-21图片预览
型号: CX20431-21
PDF下载: 下载PDF文件 查看货源
内容描述: AccessRunner ADSL -USB调制解调器设备设置 [AccessRunner ADSL-USB Modem Device Set]
分类和应用: 调制解调器
文件页数/大小: 56 页 / 363 K
品牌: CONEXANT [ CONEXANT SYSTEMS, INC ]
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AccessRunner ADSL-USB Modem Device Set Data Sheet  
Table 3-1. P5200 UIC Hardware Signal Definitions (Continued)  
Label  
Pin  
I/O  
I/O Type  
Signal Name/Description  
SDRAM/SRAM INTERFACE  
Multiplexed Row and Column Address Lines. Connect to  
SDRAM/SRAM A[11:0], respectively.  
MA[11:00]  
132-136, 139-145  
O
Ot4  
It/Ot4  
Ot4  
Ot4  
Ot4  
Ot4  
Data Lines. Connect to SDRAM/SRAM D[15:0], respectively.  
MD[15:00]  
MB0  
102-106, 109-  
116, 119-121  
I/O  
O
Bank Address Select 0. Connect to SDRAM/SRAM Bank Address  
Select 0 input for 8 MB SDRAM; leave open for 2 MB SDRAM.  
149  
146  
124  
125  
Bank Address Select 1. Connect to SDRAM/SRAM Bank Address  
Select 1 input.  
MB1  
O
Input/Output Mask 1. Connect to SDRAM/SRAM I/O Mask High  
input.  
MM1  
O
Input/Output Mask 0. Connect to SDRAM/SRAM I/O Mask Low  
MM0  
O
input.  
SDRAM Clock. Connect to SDRAM Clock input.  
MCLK  
MCKE  
122  
123  
O
O
Ot4  
Ot4  
SDRAM Clock Enable. Active high; enables SDRAM clock. Connect  
to SDRAM Clock Enable input.  
SDRAM Row Address Strobe. Active low; starts SDRAM access  
with strobe of row address. Connect to SDRAM RAS input.  
MRAS#  
MCAS#  
MWE#  
MCS#  
126  
129  
131  
130  
O
O
O
O
Ot4  
Ot4  
Ot4  
Ot4  
SDRAM Column Address Strobe. Active low; strobes column  
address and data bytes. Connect to SDRAM CAS input.  
SDRAM Memory Write Enable. Active low; indicates write access to  
SDRAM. Connect to SDRAM Write Enable input.  
SDRAM Memory Chip Select. Active low; enables SDRAM  
command decoder. Connect to SDRAM chip select input.  
LED INTERFACE  
Receive Data LED. Illuminated when data is received from the ADSL  
line.  
LED_RXD  
(GPIO20)  
2
O
O
O
O
Ot4  
Ot4  
Ot4  
Ot4  
Transmit Data LED. Illuminated when data is transmitted to the  
ADSL line.  
LED_TXD  
(GPIO19)  
176  
1
Showtime LED. Illuminated when the ADSL transceiver is in  
Showtime Mode.  
LED_SHOWTIME  
(GPIO18)  
Ready LED. Illuminated when the device is successfully enumerated  
on the USB.  
LED_READY  
(GPIO070)  
160  
POWER AND GROUND  
Core Supply Voltage. Connect to +1.8V.  
Supply Voltage. Connect to +1.8V through filter.  
I/O Supply Voltage. Connect to +3.3V.  
VDD  
25, 66, 99, 154  
21  
PWR  
PWR  
PWR  
PWR  
PWR  
PWR  
VDDA  
VDDO  
8, 16, 37, 47, 57,  
71, 81, 91, 107,  
117, 127, 137,  
147, 158, 171  
I/O Clamp Power Supply. Connect to +5V if available, otherwise  
VGG  
23, 101  
REF  
REF  
connect to +3.3V.  
Core Ground. Connect to digital ground.  
I/O Ground. Connect to digital ground.  
VSS  
26, 67, 100, 155  
GND  
GND  
GND  
GND  
VSSO  
9, 17, 38, 48, 58,  
72, 82, 92, 108,  
118, 128, 138,  
148, 159, 172  
Ground. Connect to digital ground.  
VSSA  
22  
GND  
GND  
3-6  
Conexant  
100427B  
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