MAX9257 Maxim, MAX9257 Datasheet - Page 26

• Manufacturer Part Number: MAX9257
• Description: The MAX9257 serializer pairs with the MAX9258 deserializer to form a complete digital video serial link
• Manufacturer: Maxim

Fully Programmable Serializer/Deserializer
with UART/I
A GPIO can be programmed to drive an LVCMOS logic
level or to read a logic input. The register bit that sets
the output level when the GPIO is programmed as an
output stores the input level when the GPIO is pro-
grammed as an input.
LOCK and ERROR are open-drain outputs that require
a pullup resistor to an external supply. ERROR asserts
Table 20. MAX9257 Modulation Rate
26
SERIAL-WORD
______________________________________________________________________________________
LENGTH
12
14
16
18
20
Open-Drain Outputs (LOCK, ERROR )
SRATE
11
11
10
10
01
01
00
11
11
10
10
01
01
00
11
11
10
10
01
01
00
11
11
10
10
01
01
00
11
11
10
01
2
C Control Channel
PRATE
11
10
10
01
01
00
00
11
10
10
01
01
00
00
11
10
10
01
01
00
00
11
10
10
01
01
00
00
11
10
01
00
PCLK RANGE
33.3–40
20–33.3
16.6–20
10–16.6
28.6–40
20–28.6
14.3–20
10–14.3
40–52.5
12.5–20
10–12.5
6.25–10
40–46.6
22.2–40
20–22.2
11.1–20
10–11.1
8.3–10
7.1–10
5–6.25
5.6–10
(MHz)
40–70
40–60
25–40
20–25
40–42
20–40
10–20
5–8.3
5–7.1
5–5.6
5–10
low when an error occurs and LOCK is high impedance
when the MAX9258 is locked to the MAX9257 and
remains high under the locked condition. When the
devices are in shutdown, the channel is not locked and
LOCK goes high impedance, is pulled high, and should
be ignored. ERROR is high impedance at shutdown
and remains high. In choosing pullup resistors, there is
a tradeoff between power dissipation and speed; 10kΩ
pullup should be sufficient.
MODULATION RATE
PCLK/2728
PCLK/1736
PCLK/1612
PCLK/1116
PCLK/2304
PCLK/1728
PCLK/1440
PCLK/1008
PCLK/1008
PCLK/1968
PCLK/1640
PCLK/1312
PCLK/1840
PCLK/1472
PCLK/1104
PCLK/1632
PCLK/1632
PCLK/1020
PCLK/992
PCLK/744
PCLK/868
PCLK/720
PCLK/720
PCLK/984
PCLK/820
PCLK/656
PCLK/656
PCLK/920
PCLK/736
PCLK/736
PCLK/552
PCLK/816
f
SSM
14.7 to 25.7
19.2 to 23.0
12.4 to 20.7
16.7 to 20.2
11.2 to 13.4
17.4 to 26.0
16.6 to 23.1
13.9 to 19.9
14.2 to 19.8
20.3 to 26.7
15.2 to 24.4
15.2 to 19.1
12.7 to 20.3
12.2 to 15.2
21.7 to 25.3
15.1 to 27.2
18.1 to 20.1
12.1 to 21.7
13.6 to 15.1
24.5 to 25.7
12.3 to 24.5
9.0 to 14.9
9.9 to 14.2
9.9 to 13.9
9.5 to 15.2
7.6 to 13.6
9.1 to 10.1
9.8 to 19.6
6.1 to 12.3
5.8 to 9.6
6.9 to 9.9
7.6 to 9.5
RANGE (kHz)