參數(shù)資料
型號(hào)： UPD72850AGK-9EU
廠商： NEC Corp.
元件分類： 圓形連接器
英文描述： Circular Connector; No. of Contacts:56; Series:MS27467; Body Material:Aluminum; Connecting Termination:Crimp; Connector Shell Size:25; Circular Contact Gender:Pin; Circular Shell Style:Straight Plug; Insert Arrangement:25-4 RoHS Compliant: No
中文描述： IEEE1394連接400Mbps的物理層
文件頁(yè)數(shù)： 15/48頁(yè)
文件大?。?/td> 290K
代理商： UPD72850AGK-9EU
Data Sheet S14452EJ1V0DS00
15
μ
PD72850A
3. INTERNAL FUNCTION
3.1 Link Interface
3.1.1 Connection Method
Figure 3-1. PHY/Link Connection Method
Link
PHY
μ
PD72850A
D0-D7
CTL0,CTL1
DIRECT
LPS
LKON
SCLK
LREQ
Note
Note
Clamping to V
DD
provides direct connection to Link.
Clamping to GND connects through isolation barrier to Link.
The isolation barrier connection circuit is described in
3.1.7 Isolation Barrier.
3.1.2 LPS (Link Power Status)
LPS is a function to monitor the On/Off status of the Link power supply. After 1.2
μ
sec or more, LPS is Low, the
PHY/Link is reset and D and CTL are output Low (when the isolation barrier is Hi-Z). After 2.5
μ
sec or more, LPS is
Low, moreover, the PHY stops the supply of SCLK and SCLK outputs Low (when the isolation barrier is Hi-Z).
3.1.3 LREQ, CTL0,CTL1, and D0-D7 Pins
LREQ : Indicates that a request is received from Link.
CTL0,CTL1 : Bi-directional pin which controls the functions between the PHY/Link interface.
D0-D7 : Bi-directional pin which controls the data Transfer/Receive status signal, and the speed code
Transfer/Receive status signal.
3.1.4 SCLK
49.152 MHz clock supplied by PHY for the PHY/Link interface synchronization.
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