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| 型号： | MAX9257AGCM/V+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 33/53页 |
| 文件大小： | 0K |
| 描述： | IC SERDE PROG UART/I2C 48TQFP |
| 标准包装： | 250 |
| 系列： | * |
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Maxim Integrated Products 39
MAX9257A/MAX9258A
Fully Programmable Serializer/Deserializer
with UART/I2C Control Channel
Read Packet
The ECU writes the sync frame, 7-bit device address plus
read/write bit (R/W = 1 for read), 8-bit register address,
and number of bytes to be read. The addressed device
responds with read data bytes (Figure 29). UART read
delay is maximum 4 bit times when reading from the
MAX9257A or the MAX9258A.
Time Between Frames
Up to two high bit times are allowed between frames.
Reset of Packet Boundary
A high time ranging from 14 UART bit times or more
resets the packet boundary. In this case, the next frame
received is assumed to belong to a new packet by
the MAX9257A/MAX9258A and UART-to-I2C converter.
Resetting the boundary is required. Not resetting the
boundary treats the following packets as part of the first
packet, and they may be processed incorrectly.
Data Rate
The control channel data rate in base mode is between
95kbps to 4.25Mbps (Table 28). In bypass mode, the
allowed data rate is DC to 10Mbps (Table 29). For data
rates faster than 4.25Mbps in bypass mode, REG8[5]
in MAX9257A and REG7[5] in MAX9258A must be set
high. Set the control channel data rate in base mode by
writing to REG8[1:0] in the MAX9257A and REG7[1:0] in
the MAX9258A. These write commands take effect in the
next control channel.
Programming the FAST bit takes effect in the same con-
trol channel. Both the MAX9257A and the MAX9258A
should have the same settings for FAST. It is recom-
mended to first program the FAST bit in the MAX9257A.
Programming FAST to 1 results in shorter UART pulses
on the differential link.
MAX9257A/MAX9258A
Device Address Programming
The MAX9257A/MAX9258A have device addresses that
can be programmed to any 7-bit address. Table 30
shows the default addresses.
Figure 29. UART Read Packet
Table 28. Control Channel Data Rate in
Base Mode
Table 29. Control Channel Data Rate in
Bypass Mode
Table 30. Default Device Address
MAX9257A REG8[1:0]
MAX9258A REG7[1:0]
RANGE
00
95kbps–400kbps
(default)
01
400kbps–1Mbps
10
1Mbps–4.25Mbps
11
1Mbps–4.25Mbps
MAX9257A REG8[5]
MAX9258A REG7[5]
RANGE
0
DC–4.25Mbps
1
4.25Mbps–10Mbps
DEVICE
DEFAULT
BINARY
HEX
MAX9257A
1111 1010
0xFA
MAX9258A
1111 1000
0xF8
NUMBER OF BYTES
REG ADDRESS
BYTE 1
BYTE N
DEV ADDR +
R/W
SYNC
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相关代理商/技术参数 |
参数描述 |
|---|---|
| MAX9257AGCV | 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 |
| MAX9257AGTL | 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 |
| MAX9257AGTL/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 |
| MAX9257AGTL/V+T | 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 |
| MAX9257AGTL+ | 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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