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参数资料
| 型号： | MAX9257AGCM/V+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 32/53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 38
MAX9257A/MAX9258A
Fully Programmable Serializer/Deserializer
with UART/I2C Control Channel
UART
UART Frame Format
The UART frame used to program the MAX9257A and the
MAX9258A 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 devices. The baud rate of the
synchronization frame sets the operating 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 starting with the LSB first. The synchro-
nization 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 pro-
gram the devices.
Figure 25. UART-to-I2C Conversion
Figure 26. UART Frame Format
Figure 27. UART Synchronization Frame
Figure 28. UART Write Packet to MAX9257A/MAX9258A
START
D3
D4
D5
D6
D7
PARITY
STOP
D0
D1
D2
1
0
1
0
1
0
START
SYNCHRONIZATION FRAME
STOP
PARITY
4
5
0
1
NUMBER OF BYTES
REG ADDRESS
DEV ADDR +
R/W
SYNC
BYTE 1
BYTE N
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
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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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