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S2050A/D 参数 Datasheet PDF下载

S2050A/D图片预览
型号: S2050A/D
PDF下载: 下载PDF文件 查看货源
内容描述: [Ethernet Transceiver, PQFP52, 10 X 10 MM, COMPACT, PLASTIC, QFP-52]
分类和应用: 以太网:16GBASE-T电信电信集成电路
文件页数/大小: 19 页 / 158 K
品牌: AMCC [ APPLIED MICRO CIRCUITS CORPORATION ]
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S2046/S2050  
GIGABIT ETHERNET CHIPSET  
Table 6. S2050 Pin Assignment and Descriptions  
Level I/O  
Pin # Description  
Pin Name  
D19  
D18  
D17  
D16  
D15  
D14  
D13  
D12  
D11  
D10  
D9  
TTL  
O
45  
43  
42  
40  
38  
37  
35  
34  
32  
31  
29  
28  
25  
24  
22  
21  
18  
17  
15  
14  
Parallel output data. The width of the parallel data bus is  
selected by the state of the DWS pin. Parallel data on this bus is  
clocked out on the falling edge of RCLK. In 20-bit mode, D[0] is  
the first bit received. In 10-bit mode, D[19:10] are used and  
D[9:0] are driven to the high state. In 10-bit mode, D[10] is the  
first bit received.  
D8  
D7  
D6  
D5  
D4  
D3  
D2  
D1  
D0  
LOCKDETN  
TTL  
TTL  
O
52  
Lock Detect. Active Low. When active, LOCKDETN indicates  
that the PLL is locked to the incoming data stream. When  
inactive, it provides a system flag indicating that the PLL is  
locked to the local reference clock.  
LPEN  
DWS  
I
I
8
4
Loop Enable. Active High. When active, LPEN selects the  
loopback differential serial input pins (RLX, RLY). When inactive,  
LPEN selects RX and RY (normal operation).  
Static  
TTL  
Data Width Select. The level on this pin selects the parallel data  
bus width. When LOW, a 20-bit parallel bus width is selected,  
and D[19:0] are active. When HIGH, a 10-bit parallel data bus is  
selected, D[19:10] are active and D[9:0] will go HIGH. (See  
Table 3.) A rising edge will reset the internal counters (used for  
test).  
RCLK  
Diff.  
TTL  
O
I
49  
48  
Receive Clock. Parallel data is clocked out on the falling edge of  
RCLK/RCLKN. After a sync word is detected, the period of the  
current RCLK and RCLKN is stretched to align with the word  
boundary. (See Table 3 for frequency.)  
RCLKN  
REFCLK  
SYNC  
PECL  
TTL  
2
Reference Clock. (Externally capacitively coupled.) A free-  
running crystal-controlled reference clock for the PLL clock  
multiplier. The frequency of REFCLK is set by the REFSEL pin.  
(See Table 3.)  
O
51  
Sync (Framing) Detected. Active High. Upon detection of a valid  
sync symbol (COMMA: 0011111XXX, positive running disparity),  
this output goes active for one RCLK period. When SYNC is  
active, the sync symbol is present on the parallel data bus bits  
D[9:0] in 20-bit mode or D[19:10] in 10-bit mode. SYNC is gated  
by SYNCEN.  
RLX  
RLY  
Diff.  
PECL  
I
11  
12  
Receive Loopback Serial Inputs. (Externally capacitively  
coupled.) The serial loopback data inputs. RLX is the positive  
input, and RLY is the negative input.  
March 29, 2000 / Revision B  
9