參數(shù)資料
型號: PDI1394P11BD
廠商: NXP SEMICONDUCTORS
元件分類: 通用總線功能
英文描述: 3-port physical layer interface
中文描述: TRIPLE LINE TRANSCEIVER, PQFP64
文件頁數(shù): 34/42頁
文件大?。?/td> 233K
代理商: PDI1394P11BD
Philips Semiconductors
Preliminary data
PDI1394P23
2-port/1-port 400 Mbps physical layer interface
2001 Sep 06
34
The sequence of events for resetting the PHY-LLC interface when it
is in the differentiated mode of operation (ISO terminal is low) is as
follows:
1. Normal operation. Interface is operating normally, with LPS
active, SYSCLK active, status and packet data reception and
transmission via the CTL and D lines, and request activity via
the LREQ line.
2. LPS deasserted. The LLC deasserts the LPS signal and, within
1.0 ms, terminates any request or interface bus activity, and
places its LREQ, CTL, and D outputs into a high-impedance
state (the LLC should terminate any output signal activity such
that signals end in a logic 0 state).
3. Interface reset. After T
LPS_RESET
time, the PHY determines that
LPS is inactive, terminates any interface bus activity, and places
its CTL and D outputs into a high-impedance state (the PHY will
terminate any output signal activity such that signals end in a
logic 0 state). The PHY-LLC interface is now in the reset state.
4. Interface restored. After the minimum T
RESTORE
time, the LLC
may again assert LPS active. (The minimum T
RESTORE
interval
provides sufficient time for the biasing networks used in Annex J
type isolation barrier circuits to stabilize and reach a quiescent
state if the isolation barrier has somehow become unbalanced.)
When LPS is asserted, the interface will be initialized as
described on the next page.
T
LPS_RESET
T
RESTORE
ISO
SYSCLK
CTL0, CTL1
D0 – D7
LREQ
LPS
(high)
(a)
(c)
(d)
(b)
SV01811
Figure 21.
Interface Reset, ISO High
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