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参数资料
| 型号： | MAX9257GTL+T |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 21/52页 |
| 文件大小： | 0K |
| 描述： | IC SER/DESER PROG 40-TQFN |
| 其它有关文件： | Automotive Product Guide |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 标准包装： | 2,500 |
| 功能： | 串行器/解串器 |
| 数据速率： | 840Mbps |
| 输入类型： | 串行 |
| 输出类型： | LVDS |
| 输入数： | 16 |
| 输出数： | 1 |
| 电源电压： | 3 V ~ 3.6 V |
| 工作温度： | -40°C ~ 105°C |
| 安装类型： | 表面贴装 |
| 封装/外壳： | 40-WFQFN 裸露焊盘 |
| 供应商设备封装： | 40-TQFN-EP（5x5） |
| 包装： | 带卷 (TR) |
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MAX9257/MAX9258
register REG2 for both the MAX9257 and the MAX9258.
The four bits of REG2[7:4] select the divide ratio (STODIV)
for the STO clock as a function of the pixel clock (Table
24). The timeout period is determined by counter bits
REG2[3:0] that increment once every STO clock period.
Write to REG2[3:0] to determine the counter end time.
The STO counter counts to the programmed STOCNT +
1. The ECU must begin communicating before STO times
out, otherwise, the control channel closes (Figure 22). The
STO timeout period is given by:
For example:
If the pixel clock frequency is set to 16MHz, STODIV is
set to 1010 (STODIV = 1024), and STOCNT is set to
1001 (STOCNT = 9), the STO timer counts with
15.625kHz STO clock (16MHz/1024) internally until it
reaches 10 and timer expires. The tSTO is equal to tT x
1024 x 10 = 640s.
The default value for STODIV is 1024 while the default
value for STOCNT is 0. That means the STO timeout
period is equal 1024 pixel clock cycles. Activity from
the ECU on the control channel shuts off the STO timer
and starts the ETO timer.
ETO Timer
The ETO (end timeout) timer closes the control channel
if the ECU stops communicating for the ETO timeout
period. Configure register REG3[7:4] for both the
MAX9257 and the MAX9258 to select the divide ratio
(ETODIV) for the ETO clock as a function of the pixel
clock (Table 25). The timeout period is determined by
t
f
STODIV
STOCNT
STO
CLK
=
××
+
1
()
28
______________________________________________________________________________________
Fully Programmable Serializer/Deserializer
with UART/I2C Control Channel
REG3[7:4]
ETODIV
00XX
16
0100
16
0101
32
0110
64
0111
128
1000
256
1001
512
1010
1024
1011
2048
1100
4096
1101
8192
1110
16,384
1111
32,768
Table 25. ETO Clock Divide Ratio
VIDEO
HSK
VSYNC_IN
SDI/O
±
CCEN
T1
T2
T3
TX
RX
DOUT_
FROZEN
T1 = TIME TO ENTER CONTROL CHANNEL
T2 = STO TIMEOUT PERIOD
T3 = CONTROL CHANNEL EXIT TIME DUE TO STO
HSK = HANDSHAKING BETWEEN THE MAX9257 AND THE MAX9258
Figure 22. Control Channel Closing Due to STO Timeout
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9258 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Fully Programmable Serializer/Deserializer with UART/I2C Control Channel |
| MAX9258A | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:Fully Programmable Serializer/Deserializer with UART/I2C Control Channel |
| MAX9258AEVKIT# | 功能描述:界面开发工具 MAX9257A/58A Eval Kit RoHS:否 制造商:Bourns 产品:Evaluation Boards 类型:RS-485 工具用于评估:ADM3485E 接口类型:RS-485 工作电源电压:3.3 V |
| MAX9258AGCM | 制造商:MAXIM 制造商全称: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 类型:Deserializer 数据速率:1.485 Gbit/s 输入类型:ECL/LVDS 输出类型:LVCMOS 输入端数量:1 输出端数量:20 工作电源电压:2.375 V to 2.625 V 工作温度范围:0 C to + 70 C 封装 / 箱体:TQFP-64 |
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