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GS1675 データシート(PDF) 7 Page - Gennum Corporation

部品番号 GS1675
部品情報  Differential inputs and outputs
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メーカー  GENNUM [Gennum Corporation]
ホームページ  http://www.gennum.com
Logo GENNUM - Gennum Corporation

GS1675 データシート(HTML) 7 Page - Gennum Corporation

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GS1675 SD/HD SDI Reclocker
Data Sheet
54174 - 1
June 2011
7 of 37
1.3 Default Start-up Settings
The GS1675 has some functions that are not accessible via direct pin control, and are
only accessible through the host interface registers. These functions have an internal
pull-up or pull-down resistor that sets the default logic level or start-up state, if it is not
already set by a pin.
If the user wishes to override these logic levels, the associated bit should be programmed
within the PIN_OR_1 register (pin override register) at address 0x0C. The logic values
within the PIN_OR_1 register become active when the user sets the Pin Override Enable
bit to HIGH within that same register.
Table 1-2 shows:
1. The default logic state set by the internal pull up or pull down resistors.
2. The default values within the Pin Override register upon reset.
Table 1-2: GS1675 Default Start-up Settings
Name
Description
Default State set by
Internal Resistors
Default State within
the Pin Override
Register
DDI_SEL[0:1]
Selects one of two serial digital input signals for
processing. DDI0 is selected by default.
0:0
0:0
BYPASS
Bypasses the reclocker stage when set HIGH.
0
0
AUTOBYPASS
When set HIGH, this bit automatically bypasses the
reclocker stage when the PLL is not locked to a
supported rate.
00
AUTO/MAN
When set HIGH, the standard is automatically detected
from the input data rate.
10
SS0, SS1
When AUTO/MAN is set HIGH, SS[1:0] are outputs
displaying the data rate to which the PLL has locked.
Therefore, they will not have default values.
None
0:0
KBB
Controls the loop bandwidth of the PLL.
Floating
Ground
DATA_MUTE
Mutes the DDO0/DDO0 and DDO1/DDO1 (if data is
selected) outputs when LOW.
10
DDO1_DISABLE
Disables the DDO1/RCO and DDO1/RCO outputs when
LOW.
00
DATA/CLOCK
HIGH = DATA
LOW = CLOCK
00


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