參數(shù)資料
型號(hào)： TSB41AB3IPFPEP
廠商： Texas Instruments
文件頁(yè)數(shù)： 43/55頁(yè)
文件大?。?/td> 0K
描述： IC 3PRT CABLE TXRX/ARBIT 80HTQFP
標(biāo)準(zhǔn)包裝： 96
類型： 收發(fā)器
驅(qū)動(dòng)器/接收器數(shù)： 6/6
規(guī)程： IEEE 1394
電源電壓： 3 V ~ 3.6 V
安裝類型： 表面貼裝
封裝/外殼： 80-TQFP 裸露焊盤
供應(yīng)商設(shè)備封裝： 80-HTQFP（12x12）
包裝： 托盤
產(chǎn)品目錄頁(yè)面： 882 (CN2011-ZH PDF)
其它名稱： 296-22528
V62/03612-01XE
TSB41AB3EP
IEEE 1394a2000 THREEPORT CABLE TRANSCEIVER/ARBITER
SGLS122C JULY 2002 REVISED JUNE 2008
48
POST OFFICE BOX 655303
DALLAS, TEXAS 75265
PRINCIPLES OF OPERATION
interface reset and disable (continued)
The sequence of events for initialization of the PHY-LLC interface when the interface is in the differentiated
mode of operation (ISO terminal is low) is as follows:1
a.
LPS reasserted. After the interface has been in the reset or disabled state for at least the minimum
TRESTORE time, the LLC causes the interface to be initialized and restored to normal operation by
reactivating the LPS signal. (In Figure 26, the interface is shown in the disabled state with SYSCLK
high-impedance inactive. However, the interface initialization sequence described here is also
executed if the interface is merely reset but not yet disabled.)
b.
SYSCLK activated. If the interface is disabled, the PHY reactivates its SYSCLK output when it detects
that LPS has been reasserted. If the PHY has entered a low-power state, it takes from 5.3 ms to 7.3 ms
for SYSCLK to be restored; if the PHY is not in a low-power state, SYSCLK is restored within 60 ns.
The PHY commences SYSCLK activity by driving the SYSCLK output low for half a cycle. Thereafter,
the SYSCLK output is a 50% duty cycle square wave with a frequency of 49.152 MHz
±100 ppm (period
of 20.345 ns). Upon the first full cycle of SYSCLK, the PHY drives the CTL and D terminals low for one
cycle. The LLC is also required to drive its CTL, D, and LREQ outputs low during one of the first six
cycles of SYSCLK (in Figure 26, this is shown as occurring in the first SYSCLK cycle).
c.
Receive indicated. Upon the eighth SYSCLK cycle following reassertion of LPS, the PHY asserts the
receive state on the CTL lines and the data-on indication (all ones) on the D lines for one or more cycles
(because the interface is in the differentiated mode of operation, the CTL and D lines is in the
high-impedance state after the first cycle).
d.
Initialization complete. The PHY asserts the idle state on the CTL lines and logic 0 on the D lines. This
indicates that the PHY-LLC interface initialization is complete and normal operation may commence.
The PHY accepts requests from the LLC via the LREQ line.
SYSCLK
ISO
(high)
(a)
(c)
(b)
CTL0
D0 D7
LREQ
LPS
(d)
TCLK_ACTIVATE
CTL1
7 Cycles
(d)
Figure 28. Interface Initialization, ISO High
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