參數(shù)資料
型號(hào)： MIC2569YQS TR
廠商： Micrel Inc
文件頁(yè)數(shù)： 13/15頁(yè)
文件大?。?/td> 715K
描述： IC POWER SWITCH CABLECARD 16QSOP
標(biāo)準(zhǔn)包裝： 2,500
類(lèi)型： 熱交換控制器
應(yīng)用： 衛(wèi)星/線纜/DVR/電視機(jī)頂盒，視頻記錄器，游戲控制臺(tái)
內(nèi)部開(kāi)關(guān)： 是
電流限制： 2.3A
電源電壓： 3.3V，5V
工作溫度： -40°C ~ 85°C
安裝類(lèi)型： 表面貼裝
封裝/外殼： 16-SSOP（0.154"，3.90mm 寬）
供應(yīng)商設(shè)備封裝： 16-QSOP
包裝： 帶卷 (TR)
Micrel, Inc.
MIC2569
 
 
September 2007 
13
M9999-092507-C
 (408) 944-0800
 
Application Information
CableCARD" Operating Modes
The OpenCable system has a host component (S-Host
or M-Host) and a card component (S-Card or M-Card).
The   host   /   card   combination   determines   which
operational mode is used i.e. S-Mode or M-Mode. This
in turn determines the appropriate state diagram. Table
3 below shows all of the combinations and operating
modes.
 
S-Host
M-Host
S-Card
S-Mode
S-Mode or No power
M-Card
S-Mode
M-Mode
 
Table 3 Operating Mode Combinations
 
An M-Host has the choice to accept or not accept an S-
Card. If the M-Host accepts the S-Card then the M-Host
will   initiate   a   change   from   M-Mode   to   S-Mode.
Otherwise, the M-Host will not power-up the S-Card.
S-Host
After power-up, the S-Host remains in state 0 [000]
unless one of two events occurs:
1.   CIS Request  The CableCard" may request
that the Vpp outputs be provided with 5VIN, that
is, enter state 1 [001]. It is the S-Host decision
whether to provide the Vpp outputs with 5VIN.
The S-Host has two possible options.
a.   If the S-Host refuses to provide 5VIN,
then the S-Host does not change to
state 1 [001] and will remain in state
0 [000], even upon card removal. See
paragraph 2 below.
b.   If the S-Host grants 5VIN, then S-Host
changes to state 1 [001]. The S-Host
remains   in   state   1   [001]   without
returning. See paragraph 2 below.
2.   Card removal  Upon card removal, the S-Host
has two possible options:
a.   The S-Host changes directly to state
0 [000], regardless of the state at card
was removed.
b.   The S-Host has the option to pass
through state 6 [110] to remove any
excessive voltage or charge on the Vpp
outputs. The S-Host then returns to
state 0 [000].
Figure 1 shows S-Mode power state diagram.
 
 
Figure 1 S-Host Power State Diagram
M-Host
1.   Power-up - Upon power-up, M-Host two options:
a.   Move directly the state 2 [010]
b.   Pass through state 7 [111] to remove any
excess voltage or charge, then move to
state 2 [010]
2.   No Card  M-Host will remain in state 2 [010]
until card insertion.
3.   Card Detection  If the M-Host detects that the
inserted card is an M-card, then the M- Host will
change to state 3 [011]. This informs the card
that the host is an M-Host.
4.   Card   ID      The   M-Host   uses   the   card
identification process to determine what type of
card it is and what modes the card can operate
in. There are three options:
a.   If the card is an M-Card, then the M-
Host will change to state 4 [100] and
remain   in   state   4   [100]   until   card
removal.
b.   If the card is an S-Card able to support
CH1, then the M-Host will reset the card
and power-up in S-Mode. The card will
remain in S-Mode until card removal.
c.   If the card is not an M-Card, or an S-
Card not able to support Ch1, then
power will not be provided to the card.
The card will remain without power and
not change state until card removal.
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