參數(shù)資料
型號： MAX9257GCM+
廠商： Maxim Integrated Products
文件頁數(shù)： 29/52頁
文件大?。?/td> 0K
描述： IC SER/DESER PROG 48-LQFP
其它有關文件： Automotive Product Guide
產(chǎn)品培訓模塊： Lead (SnPb) Finish for COTS
Obsolescence Mitigation Program
標準包裝： 250
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： 48-LQFP
供應商設備封裝： 48-LQFP（7x7）
包裝： 管件
sent, but since CTO timed out, bypass mode ends and
base mode is active for the next vertical blanking period.
With STO > CTO > ETO, bypass mode can be made
continuous by having the ECU send real commands or
dummy commands (such as a command to a nonexist-
ing address) each time the control channel opens.
Then the ECU does not have to send a command to
enter bypass mode each time it wants to program the
peripheral device.
UART
UART Frame Format
The UART frame used to program the MAX9257 and
the MAX9258 has a low start bit, eight data bits, an
even parity bit and a high stop bit. The data following
the start bit is the LSB. With even parity, when there are
an odd number of 1s in the data bits (D0 through D7)
the parity bit is set to 1. The stop bit is sampled and if it
is not high, a frame error is generated (Figure 26).
UART Synchronization Frame
The synchronization frame must precede any read or
write packets (Figure 26). Transitions in the frame cali-
brate the oscillators on the MAX9257/MAX9258. The
baud rate of the synchronization frame sets the operat-
ing baud rate of the control channel. At power-up,
UART data rate must be between 95kbps to 400kbps.
After power-up, UART data rate can be programmed
according to Tables 28 and 29. Data is serialized start-
ing with the LSB first. The synchronization frame is 0x54
as shown in Figure 27.
Write Packet
The ECU writes the sync frame, 7-bit device address
plus read/write bit (R/
W = 0 for write), 8-bit register
address, number of bytes to be written, and data bytes
(Figure 28). The ECU must follow this UART protocol to
correctly program the MAX9257/MAX9258.
MAX9257/MAX9258
______________________________________________________________________________________
35
Fully Programmable Serializer/Deserializer
with UART/I2C Control Channel
I2C
REG ADDR
DATA 0
DATA N
LSB
MSB LSB
MSB
LSB
MSB
MAX9257
PERIPHERAL
ECU
MAX9258
UART
MSB
S
SLAVE ADDRESS
I2C SLAVE ADDRESS + Wr
W
A
REG ADDRESS
A
DATA 0
A
DATA N
A
LSB
MSB
LSB
MSB
LSB
P
Figure 25. UART-to-I2C Conversion
START
D3
D4
D5
D6
D7
PARITY
STOP
D0
D1
D2
Figure 26. UART Frame Format
1
0
1
0
1
0
START
SYNCHRONIZATION FRAME
STOP
PARITY
45
0
1
Figure 27. UART Synchronization Frame
NUMBER OF BYTES
REG ADDRESS
DEV ADDR +
R/W
SYNC
BYTE 1
BYTE N
Figure 28. UART Write Packet to MAX9257/MAX9258
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相關代理商/技術參數(shù)
參數(shù)描述
MAX9257GCM/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
MAX9257GCM/V+T 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
MAX9257GCM+ 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
MAX9257GCM+T 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
MAX9257GTL/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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