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參數(shù)資料
| 型號(hào)： | BU9881 |
| 英文描述： | I2C Serial EEPROM |
| 中文描述： | I2C串行EEPROM的 |
| 文件頁(yè)數(shù)： | 7/12頁(yè) |
| 文件大?。?/td> | 142K |
| 代理商： | BU9881 |
7
Standard ICs
BU9881 / BU9881F
R / W set to 0: Writing
(0 is also set in order to specify a word address for random reading.)
R / W set to 1: Reading
1010
×
×
×
×
: Don't Care
R / W
SCL
(from
μ
-COM)
SDA
(
μ
-COM output data)
SDA
(data output from this IC)
Acknowledge signal (ACK signal)
Start condition
1
8
9
Fig. 7 Acknowledge signal (ACK signal) response
(When slave address is input for writing or reading)
(2) Device addressing
The master address should be output first, followed by the start condition, and then the slave address.
The first four bits of the slave address are used to recognize the device type. The device code for this IC is fixed
at "1010".
The next three bits of the slave address may be either HIGH or LOW.
The last bit of the slave address (R / W: READ / WRITE) is used to specify either writing or reading, and is as
shown below.
(3) ACK signal
This acknowledge signal (ACK signal) is determined by the software, and indicates whether or not the data has
been correctly transmitted. Regardless of whether the address is a master or slave address, the device on the
transmitter (sending signal) side (the
μ
-com when a slave address is input for a write command or a read com-
mand, and this IC when read command data is output) opens the bus after this 8-bit data is output.
With a device on the receiving (reception) side (this IC when a slave address is input for a read command or
write command, and a microcomputer when data is output for a read command), SDA is set to LOW during the
nine-clock cycle, and the acknowledge signal (ACK signal) is output when 8-bit data is received.
This IC output the acknowledge signal (ACK signal) in the LOW state after a start condition and a slave address
(8 bits) have been recognized.
For other writing operations, the acknowledge signal (ACK signal) is output in the LOW state each time that 8-bit
data (word address or write data) is received.
In the various reading operations, 8-bit data (read data) is output, and then the acknowledge signal (ACK signal)
in the LOW state is detected. If the acknowledge signal (ACK signal) is detected and no stop condition is sent
from the master (microcomputer) side, this IC continues to output data. If the acknowledge signal (ACK signal)
is not detected, this IC interrupts the transmission of data, recognizes a stop condition (stop bit), and terminates
the reading operation. The IC then enters the standby mode. (Refer to "Fig. 7 acknowledge signal (ACK signal)
response.")
相關(guān)PDF資料 |
PDF描述 |
|---|---|
| BU9881F | I2C Serial EEPROM |
| BU9928FV | マルチメディアLSI |
| BU999 | TRANSISTOR | BJT | NPN | 140V V(BR)CEO | 25A I(C) | SOT-93 |
| BUB941T | TRANSISTOR | BJT | DARLINGTON | NPN | 400V V(BR)CEO | 15A I(C) | TO-263 |
| BU941SM | |
相關(guān)代理商/技術(shù)參數(shù) |
參數(shù)描述 |
|---|---|
| BU9881F | 制造商:未知廠家 制造商全稱:未知廠家 功能描述:I2C Serial EEPROM |
| BU9882FV-W | 制造商:ROHM 制造商全稱:Rohm 功能描述:EDID Memory (For display) |
| BU9882FV-WE2 | 功能描述:電可擦除可編程只讀存儲(chǔ)器 2K BIT 128 X 8 X 2 3.3V/5V 14PIN RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
| BU9882F-W | 制造商:ROHM 制造商全稱:Rohm 功能描述:EDID Memory (For display) |
| BU9882F-WE2 | 功能描述:電可擦除可編程只讀存儲(chǔ)器 2K BIT 128 X 8 X 2 3.3V/5V 14PIN RoHS:否 制造商:Atmel 存儲(chǔ)容量:2 Kbit 組織:256 B x 8 數(shù)據(jù)保留:100 yr 最大時(shí)鐘頻率:1000 KHz 最大工作電流:6 uA 工作電源電壓:1.7 V to 5.5 V 最大工作溫度:+ 85 C 安裝風(fēng)格:SMD/SMT 封裝 / 箱體:SOIC-8 |
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