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参数资料
| 型号： | DS1884T+ |
| 厂商： | Maxim Integrated Products |
| 文件页数： | 30/92页 |
| 文件大小： | 0K |
| 描述： | IC SFP PON ONU CTRLR 24TQFN |
| 产品培训模块： | Lead (SnPb) Finish for COTS Obsolescence Mitigation Program |
| 产品变化通告： | DS1884 Series Discontinuation 03/Aug/2012 |
| 标准包装： | 28 |
| 系列： | * |
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DS1884
SFP and PON ONU Controller
with Digital LDD Interface
36
Maxim Integrated
I2C Protocol
Writing a Single Byte to a Slave: The master must
generate a START condition, write the slave address
byte (R/W = 0), write the memory address, write
the byte of data, and generate a STOP condition.
Remember that the master must read the slave’s
acknowledgement during all byte write operations.
Writing Multiple Bytes to a Slave: To write multiple
bytes to a slave, the master generates a START condi-
tion, writes the slave address byte (R/W = 0), writes the
memory address, writes up to 8 data bytes, and gener-
ates a STOP condition. The device writes 1 to 8 bytes
(one page or row) with a single write transaction. This is
internally controlled by an address counter that allows
data to be written to consecutive addresses without
transmitting a memory address before each data byte
is sent. The address counter limits the write to one
8-byte page (one row of the memory map). Attempts to
write to additional pages of memory without sending a
STOP condition between pages results in the address
counter wrapping around to the beginning of the pres-
ent row.
For example: A 3-byte write starts at address 06h and
writes three data bytes (11h, 22h, and 33h) to three
“consecutive” addresses. The result is that addresses
06h and 07h would contain 11h and 22h, respec-
tively, and the third data byte, 33h, would be written to
address 00h.
To prevent address wrapping from occurring, the mas-
ter must send a STOP condition at the end of the page,
then wait for the bus free time or EEPROM write time
to elapse. Then the master can generate a new START
condition and write the slave address byte (R/W = 0)
and the first memory address of the next memory row
before continuing to write data.
Acknowledge Polling: Any time a EEPROM page is
written, the device requires the EEPROM write time
(tW) after the STOP condition to write the contents of
the page to EEPROM. During the EEPROM write time,
the device does not acknowledge its slave address
Figure 19. Example I2C Timing
START
STOP
SLAVE
ACK
SLAVE
ACK
STOP
SINGLE-BYTE WRITE
-WRITE 00h TO REGISTER BAh
TWO-BYTE WRITE
-WRITE 01h AND 75h
TO C8h AND C9h
SINGLE-BYTE READ
-READ REGISTER BAh
TWO-BYTE READ
-READ C8h AND C9h
REPEATED
START
MASTER
NACK
10100010
A2h
10111010
BAh
SLAVE
ACK
START
SLAVE
ACK
10100010
A2h
1010001 1
A3h
10111010
BAh
SLAVE
ACK
SLAVE
ACK
STOP
00000000
00h
STOP
SLAVE
ACK
STOP
01110101
75h
START
SLAVE
ACK
10100010
A2h
11001000
C8h
SLAVE
ACK
SLAVE
ACK
00000001
01h
SLAVE
ACK
DATA IN BAh
DATA
REPEATED
START
MASTER
ACK
START
SLAVE
ACK
10100010
A2h
1010001 1
A3h
11001000
C8h
SLAVE
ACK
SLAVE
ACK
DATA IN C8h
DATA
MASTER
NACK
DATA IN C9h
DATA
EXAMPLE I2C TRANSACTIONS WITH A2h AS THE MAIN MEMORY DEVICE ADDRESS
*IF ASEL IS 0, THE SLAVE ADDRESS IS A0h FOR THE AUXILIARY MEMORY AND A2h FOR THE MAIN MEMORY.
IF ASEL = 1, THE SLAVE ADDRESS IS DETERMINED BY TABLE 02h, REGISTER 89h FOR THE MAIN MEMORY. THE AUXILIARY MEMORY CONTINUES TO BE ADDRESSED AT A0h, EXCEPT WHEN THE PROGRAMMED
ADDRESS FOR THE MAIN MEMORY IS A0h.
TYPICAL I2C WRITE TRANSACTION
A)
C)
B)
D)
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
REGISTER ADDRESS
MSB
LSB
b7
b6
b5
b4
b3
b2
b1
b0
DATA
SLAVE
ACK
SLAVE
ACK
SLAVE
ADDRESS*
1
0
1
0
1
R/W
MSB
LSB
READ/
WRITE
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相关代理商/技术参数 |
参数描述 |
|---|---|
| DS1884T+ | 功能描述:ADC / DAC多通道 SFP+ Controller w/ Digi LDD Interface RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| DS1884T+T | 功能描述:ADC / DAC多通道 SFP+ Controller w/ Digi LDD Interface RoHS:否 制造商:Texas Instruments 转换速率: 分辨率:8 bit 接口类型:SPI 电压参考: 电源电压-最大:3.6 V 电源电压-最小:2 V 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:VQFN-40 |
| DS1886 | 制造商:未知厂家 制造商全称:未知厂家 功能描述:带有数字LDD接口的SFP和PON ONU控制器 |
| DS1886_V1 | 制造商:MAXIM 制造商全称:Maxim Integrated Products 功能描述:SFP and PON ONU Controller with Digital LDD Interface |
| DS1886T+ | 功能描述:接口 - 专用 PON ONU/SFP CTRLR W/DIG LDD INT RoHS:否 制造商:Texas Instruments 产品类型:1080p60 Image Sensor Receiver 工作电源电压:1.8 V 电源电流:89 mA 最大功率耗散: 最大工作温度:+ 85 C 安装风格:SMD/SMT 封装 / 箱体:BGA-59 |
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