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| 型號： | MC92600CJUB |
| 廠商： | FREESCALE SEMICONDUCTOR INC |
| 元件分類： | 微控制器/微處理器 |
| 英文描述： | SPECIALTY MICROPROCESSOR CIRCUIT, PBGA217 |
| 封裝： | 23 X 23 MM, 2.32 MM HEIGHT, 1.27 MM PITCH, PLASTIC, BGA-217 |
| 文件頁數(shù)： | 40/98頁 |
| 文件大小： | 1288K |
| 代理商： | MC92600CJUB |
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MOTOROLA
Chapter 4. System Design Considerations
4-3
Standby Mode
4.3
Standby Mode
Standby mode puts the MC92600 into a low power, inactive state. When STNDBY is
asserted, the device will force all transmitter link outputs to their disabled state as dened
in Section 2.5.2, “Transmit Driver Operation,” and will disable all internal clocking. An
important feature of standby mode is that the internal PLL is not disabled. It remains
operating and locked to the reference clock. Keeping the internal PLL enabled greatly
reduces the time needed to recover from standby mode to run mode, because only the
receiver initialization and word alignment start-up steps are required.
4.4
Repeater Mode
To send 32 bytes of data the MC92600 can be congured into a four-link receive-transmit
repeater by setting REPE high. In repeater mode data received on link A's receiver is
forwarded to link A's transmitter, link B's receiver to link B's transmitter, and so on. The
following conguration inputs may be used to control how the repeater handles data that
passes through it: 10-bit interface, byte alignment, word synchronization, add/drop idle,
half-speed, and double data rate modes.
Certain congurations are more effective than others for various applications. The
transmitter at the source, the receiver at the destination, and the repeater must have
compatible congurations to ensure proper operation. The following sections describe how
each conguration control affects repeater operation.
Table 4-3. Settings for Repeater Mode
Mode
Signals
Recommended
State
Description
Word Synchronization
Mode
WSE
Don’t care
Enables word synchronization if desired. See Section
4.4.3 for more details.
Byte Alignment Mode
BSYNC_1
Don’t care
Byte alignment is required for idle detection. Both
alignment modes are supported in repeater mode.
See Section 4.4.2 for more details.
Add / Drop Idle Mode
ADIE
High
When enabled, allows the receiver to add/delete idle
patterns to maintain word alignment. This is the
recommended operating mode. Recovered clock
mode cannot be run in repeater mode therefore,
add/delete idles must be enabled
10-bit Interface
TBIE
Don’t care
When enabled, the idle character must be part of the
TBI code set.
When disabled, the idle is naturally supported by the
8B/10B codes.
Recovered Clock
RCCE
Illegal
Recovered clock mode cannot be run in repeater
mode. Repeater mode uses reference clock mode
exclusively.
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