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FIN212AC Arkusz danych(PDF) 5 Page - Fairchild Semiconductor

Numer części FIN212AC
Szczegółowy opis  12-Bit Serializer Deserializer with Multiple Frequency Ranges
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Producent  FAIRCHILD [Fairchild Semiconductor]
Strona internetowa  http://www.fairchildsemi.com
Logo FAIRCHILD - Fairchild Semiconductor

FIN212AC Arkusz danych(HTML) 5 Page - Fairchild Semiconductor

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© 2006 Fairchild Semiconductor Corporation
www.fairchildsemi.com
FIN212AC Rev. 1.0.1
5
Power-Down Functionality:
When both S1 and S0
signals are 0, regardless of the state of the DIRI
signal, the FIN212AC resets and powers down. The
power-down mode shuts down all internal analog
circuitry, disables the serial input and output of the
device, and resets all internal digital logic. Table 5
indicates the state of the output buffers in Power-
Down mode.
Signal Pins
DIRI=1
DIRI=0
DP[10:1]
Inputs Disabled
Outputs HIGH-Z
DP[12:11]
Inputs Disabled
Outputs HIGH-Z
CKP
HIGH
Outputs HIGH-Z
STROBE
Input Disabled
Input Disabled
CKREF
Input Disabled
Input Disabled
/DIRO
0
1
Table 5. Output States
When an input is disabled, it does not draw current,
regardless of the state or level of the input signal.
All of the LV-CMOS inputs must remain driven during
power-down to ensure a low-power state
Turn-Around Functionality:
The device passes and
inverts the DIRI signal asynchronously to the /DIRO
signal. Care must be taken by the system designer to
ensure that no contention occurs between the
deserializer outputs and the other devices on this port.
Optimally the peripheral device driving the serializer
should be put into a HIGH-impedance state prior to the
DIRI signal being asserted. When a device with
dedicated data outputs turns from a deserializer to a
serializer, the dedicated outputs remain at the last
logical value asserted. This value only changes if the
device is once again turned around into a deserializer
and the values are overwritten.
Strobe Pass-Through Mode:
For some applications,
it is desirable to pass a word clock across a
differential signal pair in the opposite direction of
serialization. The FIN212 supports this mode of
operation. The following describes how to enable this
functionality.
Deserializer Configuration (DIRI=0)
1.
CKREF LOW
2.
Master clock connected DES to STROBE
Serializer Configuration (DIRI=1)
1.
CKSI passes signal to serializer CKP
[CTL_ADJ]
CTL
Drive
Adjustment:
The drive
characteristics of the CTL I/O can be adjusted through
the CTL_ADJ pin. Standard-level CTL drive is
provided when the CTL_ADJ pin is zero. High- level
drive is provided when CTL_ADJ pin is HIGH. High-
drive should be used in noisy environments or when
driving cables longer than 20cm. When in high-drive
mode, CTL drive increases by approximately by 50%.
CTL_ADJ
Description
0
Standard CTL Drive
1
High CTL Drive
Table 6. CTL_ADJ Functionality
[(/XTRM]] Test / XTRM Mode Functionality:
For the
deserializer, the (XTRM) signal can be used to enable
or disable the internal termination resistor on the CKS
and DS signals of the deserializer. When the internal
termination is disabled, an external termination resistor
is required for the CTL I/O to operate properly.
(XTRM)
DIRI=0 (/XTRM)
0
Internal Termination
1
External Termination
Table 7. (/XTRM) Functionality
Serializer Configuration (DIRI=1)
1.
Master CLK transmitted out of SER CKP
2.
Drive the pixel_CLK [(/XTRM)] into SER TROBE
Deserializer Configuration (DIRI=0)
1.
Pixel_CLK transmitted out of DES CKP


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