參數(shù)資料
型號: AM79C901AVIT
廠商: Advanced Micro Devices, Inc.
英文描述: HomePHY Single-Chip 1/10 Mbps Home Networking PHY
中文描述: HomePHY單芯片的1 / 10 Mbps的家庭網(wǎng)絡(luò)物理層
文件頁數(shù): 24/90頁
文件大小: 714K
代理商: AM79C901AVIT
24
Am79C901A
P R E L I M I N A R Y
Figure 4.
TXPKT - TXEN Asserted
Figure 5.
TXPKT - RXCLK Active
TXCLK
TXEN
TXDAT
RXCLK
RXCRS
RXDAT
CLS
Note
:
Once TXEN is asserted, the PHY stops RXCLK, asserts RXCRS, and toggles TXCLK.
22304B-6
TXCLK
TXEN
TXDAT
RXCLK
RXCRS
RXDAT
CLS
22304B-7
Note
: TXCLK continues to toggle until the SFD is observed, as shown in the first section of the above diagram.
At this point, TXCLK is disabled (low) until the AID header has been transmitted on the wire (or until a CLS has
been detected). At this time RXCLK starts toggling, thereby, shifting 32 bits of preamble and SFD back to the
MAC. Sometime later, the TXCLK restarts as symbols get sent onto the wire in an analogous manner as
RXCLK during packet reception.
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