MAX9263GCB/V+T Maxim Integrated, MAX9263GCB/V+T Datasheet - Page 40

• Manufacturer Part Number: MAX9263GCB/V+T
• Description: Serializers & Deserializers - Serdes GMSL Serializer w/HDCP Interface
• Manufacturer: Maxim Integrated

40
HDCP Gigabit Multimedia Serial
Link Serializer/Deserializer
To reduce the EMI generated by the transitions on
the serial link and parallel outputs, both the serial-
izer and deserializer support spread spectrum. Turning
on spread spectrum on the deserializer spreads the
parallel video outputs. Turning on spread spectrum
on the serializer spreads the serial link, along with the
deserializer parallel outputs. Do not enable spread for
both the serializer and deserializer. The six selectable
spread-spectrum rates at the serializer serial output are
Q0.5%, Q1%, Q1.5%, Q2%, Q3%, and Q4% (Table 8).
Some spread-spectrum rates can only be used at lower
PCLK_ frequencies (Table 9). There is no PCLK_ fre-
quency limit for the 0.5% spread rate. The two selectable
spread-spectrum rates at the deserializer parallel output
are Q2% and Q4% (Table 10).
Set the serializer SSEN input high to select 0.5% spread
at power-up and SSEN input low to select no spread at
power-up. Set the deserializer SSEN input high to select
2% spread at power-up and SSEN input low to select no
Table 8. Serializer Serial Output Spread
Table 9. Serializer Spread Rate Limitations
Table 10. Deserializer Parallel Output Spread
24-BIT MODE PCLK_
FREQUENCY (MHz)
33.3 to < 66.7
000
001
010
011
100
101
110
111
SS
SS
00
01
10
11
< 33.3
66.7+
No spread spectrum. Power-up default when SSEN = low.
Q0.5% spread spectrum. Power-up default when SSEN = high.
Q1.5% spread spectrum.
Q2% spread spectrum.
No spread spectrum.
Q1% spread spectrum.
Q3% spread spectrum.
Q4% spread spectrum.
No spread spectrum. Power-up default when SSEN = low.
Q2% spread spectrum. Power-up default when SSEN = high.
No spread spectrum.
Q4% spread spectrum.
Spread Spectrum
32-BIT MODE PCLK_
FREQUENCY (MHz)
20 to < 50
< 25
50+
spread at power-up. The state of SSEN is latched upon
power-up or when resuming from power-down mode.
Whenever the serializer spread spectrum is turned on
or off, the serial link automatically restarts and remains
unavailable while the deserializer relocks to the serial
data. Turning on spread spectrum on the serializer
or deserializer does not affect the audio data stream.
Changes in the serializer spread settings only affect
the deserializer MCLK output if it is derived from PCLK_
(MCLKSRC = 0).
The serializer/deserializer include a sawtooth divider to
control the spread-modulation rate. Auto detection or
manual programming of the PCLKIN operation range
guarantees a spread-spectrum modulation frequency
within 20kHz to 40kHz. Additionally, manual configura-
tion of the sawtooth divider (SDIV: 0x03, D[5:0]) allows
the user to set a modulation frequency according to
the PCLKIN frequency. Always keep the modulation
frequency between 20kHz to 40kHz to ensure proper
operation.
SERIAL LINK BIT-RATE
SPREAD (%)
SPREAD (%)
1000 to < 2000
(Mbps)
< 1000
2000+
AVAILABLE SPREAD
All rates available
1.5%, 1.0%, 0.5%
RATES
0.5%