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參數(shù)資料
| 型號(hào)： | MAX9257GTL+T |
| 廠商： | Maxim Integrated Products |
| 文件頁數(shù)： | 24/52頁 |
| 文件大?。?/td> | 0K |
| 描述： | IC SER/DESER PROG 40-TQFN |
| 其它有關(guān)文件： | Automotive Product Guide |
| 產(chǎn)品培訓(xùn)模塊： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 標(biāo)準(zhǔn)包裝： | 2,500 |
| 功能： | 串行器/解串器 |
| 數(shù)據(jù)速率： | 840Mbps |
| 輸入類型： | 串行 |
| 輸出類型： | LVDS |
| 輸入數(shù)： | 16 |
| 輸出數(shù)： | 1 |
| 電源電壓： | 3 V ~ 3.6 V |
| 工作溫度： | -40°C ~ 105°C |
| 安裝類型： | 表面貼裝 |
| 封裝/外殼： | 40-WFQFN 裸露焊盤 |
| 供應(yīng)商設(shè)備封裝： | 40-TQFN-EP（5x5） |
| 包裝： | 帶卷 (TR) |
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MAX9257/MAX9258
After the control channel closes, there is a brief hand-
shake period (T3 in Figure 22 and T5 in Figure 23)
between the MAX9257 and the MAX9258. The
MAX9258 sends a special lock frame to the MAX9257
to indicate if PLL is still locked. The MAX9258 sends the
lock frame if the number of decoding errors didn’t
exceed a threshold in the last LVDS video phase ses-
sion. The MAX9258 features a proprietary VCO lock
that prevents frequency drift while in the control chan-
nel for extended periods of time. If MAX9257 receives
the lock frame, it understands that the MAX9258 is in a
locked state and sends a short training sequence. If the
lock frame is not received by the MAX9257, it assumes
that the MAX9258 is not locked and sends a long train-
ing sequence. After the short or long training sequence
is complete, the MAX9257 sends three special synchro-
nization words before entering the video phase.
Training sequence is used to resynchronize the
MAX9257/MAX9258 before the video phase starts.
The MAX9257/MAX9258 control channel duration is
independent of VSYNC. The control channel does not
close when VSYNC deasserts, which allows the use of
a VSYNC interrupt signal on VSYNC_IN. The control
channel must be closed by STO, ETO, or EF. If the con-
trol channel does not close before video data becomes
available, video data can be lost.
STO/ETO Timer Programming
STO and ETO can be programmed given the values of
T2, T4, and maximum values of T1, T3, and T5 (Figures
22, 23):
tT = pixel clock period, tUCLK = UART period
When spread spectrum is not enabled in MAX9257:
max(T1) = 2.5s + (3 x tT) + (4 x tUCLK)
When spread spectrum is enabled in MAX9257:
max(T1) = 2.5s + (1400 x tT) + (4 x tUCLK)
T2 = tSTO
T4 = tETO
When pixel clock frequency range (PRATE) is 00 or 01:
When pixel clock frequency range (PRATE) is 10 or 11:
CTO Timer
The CTO (come-back timeout) timer temporarily or per-
manently blocks programming to the MAX9257/
MAX9258 registers. CTO keeps the MAX9257/ MAX9258
in bypass mode for the CTO timeout period (Table 26).
Bypass mode can only be exited when the CTO timer
expires. The CTO timer uses the UART bit times for its
counter. Note that STO and ETO timers use the pixel
clock while CTO uses the UART bit times. The UART
period tUCLK synchronizes with the UART bit times,
which synchronize every time the SYNC frame is sent.
When the CTO timer times out, INTEN bit in both
devices is set to 0 and the MAX9257/MAX9258 revert
back to base mode. If communication with the
MAX9257/MAX9258 is not needed after initial program-
ming is complete, CTO may be set to 000 (never come
back). In this case, CTO never expires and the
MAX9257/MAX9258 stay in bypass mode until they are
powered down. This prevents accidental programming
of the MAX9257/MAX9258 while ECU communicates
with the peripheral using a different UART protocol from
the MAX9257/MAX9258 UART protocol.
The overall CTO timeout is calculated as follows:
tCTO = tUCLK x CTO
max(
)
(
T
t
tt
STO
T
UCLK
3
8
1090
20
=
+
×+
×
))
max(
)
(
T
t
tt
ETO
TUC
5
8
1090
20
=
+
×+
×
L
LK)
max(
)
(
)
T
t
tt
STO
T
UCLK
3
8
546
20
=
+
×+
×
m
max(
)
(
T
t
tt
ETO
T
UCLK
5
8
546
20
=
+
×+
×
))
30
______________________________________________________________________________________
Fully Programmable Serializer/Deserializer
with UART/I2C Control Channel
MAX9257 REG2[7:4]
MAX9258 REG3[7:4]
COUNTER USING UART BIT
TIMES
000
Never come back
(lockout)
001
16
010
32
011
48
100
64
101
80
110
96
111
112
Table 26. CTO Counter Timeout Period
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相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| MAX9258 | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Fully Programmable Serializer/Deserializer with UART/I2C Control Channel |
| MAX9258A | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Fully Programmable Serializer/Deserializer with UART/I2C Control Channel |
| MAX9258AEVKIT# | 功能描述:界面開發(fā)工具 MAX9257A/58A Eval Kit RoHS:否 制造商:Bourns 產(chǎn)品:Evaluation Boards 類型:RS-485 工具用于評(píng)估:ADM3485E 接口類型:RS-485 工作電源電壓:3.3 V |
| MAX9258AGCM | 制造商:MAXIM 制造商全稱:Maxim Integrated Products 功能描述:Fully Programmable Serializer/Deserializer with UART/I2C Control Channel |
| MAX9258AGCM/V+ | 功能描述:串行器/解串器 - Serdes Prog Serializer / Deserializer RoHS:否 制造商:Texas Instruments 類型:Deserializer 數(shù)據(jù)速率:1.485 Gbit/s 輸入類型:ECL/LVDS 輸出類型:LVCMOS 輸入端數(shù)量:1 輸出端數(shù)量:20 工作電源電壓:2.375 V to 2.625 V 工作溫度范圍:0 C to + 70 C 封裝 / 箱體:TQFP-64 |
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